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Get everyday image, text, data, and developer tasks done

Complete image, text, data, security, document, and developer tasks with 100+ free tools. Most processing stays in your browser, and no account is required.

Crypto & Hash

25 tools

Encoders & Converters

Task collections

Start with higher-intent task collections that group existing tools around real jobs.

Image tools

13 tools

Start with image cleanup, transparent PNGs, compression, icon export, palette extraction, and print-friendly sizing in one browser-first workflow.

PDF & documents

7 tools

A focused collection for PDF signature checks, document markup prep, tables, and file-to-text workflows. Fuller document editing remains a roadmap item.

Passport & ID photos

6 tools

Use the registered browser tools that help with passport photos, background cleanup, file size tuning, print resolution, and metadata removal.

Security & privacy

9 tools

Browser-first security helpers for password generation, hashing, encryption, signature checks, metadata removal, and two-factor setup.

International text

8 tools

A practical cluster for encoding issues, character lookups, locale-sensitive cleanup, phone and email normalization, and text that must survive many systems.

Finance calculators

9 tools

Use practical finance tools for amortization, mortgage comparison, APR estimates, savings plans, VAT or GST math, and generic paycheck take-home planning.

Education & study

8 tools

A mixed collection for homework, revision, classroom examples, notes, and self-checks across math, statistics, Markdown, and text-focused practice.

Popular developer workflows

Start with tools developers and AI-assisted coding workflows use every day.

Background Remover — Transparent PNG Maker

Remove solid white, green-screen, blue-screen, or custom color backgrounds in your browser. Auto-detect edge colors, preserve enclosed character details, trim transparent borders, and export game-ready PNG assets.

JSON Formatter & Viewer — Free Online

Format, prettify, minify, and validate JSON instantly with this free online JSON formatter. Adjust indentation, sort keys, and view stats in real time.

JWT & Bearer Token Inspector - Decode JSON Web Tokens

Free online JWT decoder and Bearer token inspector. Decode JWT headers, payloads, and check expiration claims instantly in your browser.

Image Resizer & Target File Size Compressor

Resize images locally and hit common upload limits like 20 KB, 50 KB, 100 KB, 200 KB, 500 KB, or 1 MB with JPEG and WebP target-size search.

JSONPath Tester — Query JSON Responses

Test JSONPath expressions against JSON data in your browser. Extract values from API responses, logs, configuration files, and AI-generated JSON payloads.

SEO Meta Auditor — GEO Content Checker

Audit HTML title, meta description, canonical URL, H1 count, and JSON-LD signals for SEO, GEO, and AI answer-engine readiness directly in your browser.

Quick home filter

Clear home filter Crypto & Hash Encoders & Converters Web & Auth Development Network Text Data Formats Images & Videos Math Measurement

186 tools

Browse all tools by workflow

Browse encoding, API debugging, security, image editing, game assets, text, network, math, and data tools by real workflow.

Crypto & Hash

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SHA Hash & HMAC Generator

Generate SHA-1, SHA-256, SHA-384, SHA-512 hashes and HMAC signatures with this free online tool. No sign-up required, runs entirely in your browser.

Secure Password Generator

Generate strong, random passwords with customizable length and character sets using this free online tool. No sign-up required, runs entirely in your browser.

UUID v4 & v7 Generator

Generate UUID v4 (random) and UUID v7 (timestamp-based) identifiers in bulk with this free online tool. No sign-up required, runs entirely in your browser.

X.509 Certificate Chain Validator — Verify PEM Chains

Build and verify an X.509 certificate chain from PEM files. Check signatures, trust anchors, dates, CA constraints, key usage, purpose, and TLS hostnames locally.

WebAuthn and Passkey Credential Debugger

Inspect WebAuthn credential JSON, client data, authenticator flags, attestation CBOR, COSE keys, counters, and assertion fields offline.

Wei Gwei Ether Converter

Convert Ethereum values between wei, gwei, and ether for gas fee estimates, transaction debugging, and smart contract development.

Ethereum Address Checksum Tool

Validate and convert Ethereum wallet addresses to EIP-55 checksum format for Web3 development and transaction safety.

ABI Selector and Calldata Inspector

Compute Ethereum ABI function selectors and inspect calldata prefixes for Solidity smart contract debugging.

Keccak-256 Hash Tool

Generate Keccak-256 hashes for Ethereum, Solidity, smart contracts, selectors, and Web3 debugging.

JWE Encrypt, Decrypt, and Protected Header Inspector

Encrypt and decrypt compact JWE tokens locally with dir/A256GCM or RSA-OAEP-256/A256GCM, and inspect protected headers without decrypting.

Transaction Calldata Decoder

Inspect whole-byte, 0x-prefixed Ethereum calldata, function selectors, byte length, and raw transaction fields.

Wallet Signature Inspector

Inspect Ethereum wallet signatures, EIP-191 framing, r/s/v fields, hexadecimal validity, and 65-byte payload shape.

BIP39 Seed Phrase Structure Checker

Check BIP39 recovery phrase word count, duplicate words, and common mnemonic formatting issues without sending data to a server.

Certificate Format Converter — PEM, DER, P7B, and PFX Inspector

Convert X.509 certificates between PEM and DER, inspect bundles, extract PKCS#7 certificates, and locally inspect password-protected PKCS#12/PFX files.

Bcrypt Hash Generator & Verifier

Generate and verify bcrypt password hashes with adjustable cost factor using this free online tool. No sign-up required, runs entirely in your browser.

AES Encryption & Decryption Tool

Encrypt and decrypt text with authenticated AES-GCM. Tampered ciphertext is rejected, keys are derived from passwords with PBKDF2, and all processing stays in your browser.

Merkle Tree Root & Proof Tool

Build a Keccak Merkle root from leaves, generate an inclusion proof for any leaf, and verify that proof against the root.

Base58, Bech32 & Hex Converter

Convert blockchain data between Base58, Bech32 or Bech32m, and hexadecimal, with checksum validation and witness version detection.

OTP Generator & TOTP Authenticator — 2FA Codes

Generate automatically refreshing TOTP and OTP codes for two-factor authentication. View adjacent time windows, scan a QR code, and copy derived values locally.

X.509 Certificate Decoder

Free online X.509 certificate decoder. Parse PEM certificates to view subject, issuer, validity, SAN, fingerprints, and extensions. No sign-up required.

Password Strength Analyser

Estimate how many guesses a password really takes by detecting dictionary words, leet spelling, repeats, sequences, keyboard runs and dates, with crack times for four attack scenarios.

RSA Key Pair Generator

Generate 2048, 3072, or 4096-bit RSA key pairs in the browser and export them as SPKI and PKCS#8 PEM blocks.

Ed25519 Key Generator — Sign & Verify

Free online Ed25519 key pair generator with message signing and signature verification. Uses the Web Crypto API. No sign-up, runs in your browser.

BIP39 Mnemonic Generator — Seed Phrase Creator

Free online BIP39 mnemonic generator. Create 12-24 word seed phrases with cryptographic entropy and checksum validation. No sign-up, runs in your browser.

PGP Encryption & Decryption — OpenPGP Online

Client-side online PGP decrypt and encrypt tool. Inspect armored message metadata, verify signatures, inspect key fingerprints, and generate ECC/RSA keys with OpenPGP.js.

Encoders & Converters

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Base64 String Encoder & Decoder

Encode and decode Base64 strings instantly with this free online converter. Supports standard and URL-safe Base64. No sign-up required, runs entirely in your browser.

JSON to TypeScript & Zod Generator

Convert JSON into typed TypeScript interfaces, type aliases, or Zod validation schemas locally in your browser.

PDF Merge, Split & Reorder — Select Exact Page Ranges

Merge multiple PDFs, reorder source documents, extract selected pages, or split one PDF into range-based files entirely in your browser.

HTML to Text and Markdown Converter

Turn pasted HTML into readable plain text or Markdown while preserving useful document structure.

URL Encoder & Decoder — Free Online

Encode and decode URLs instantly with this free online tool. Supports encodeURIComponent and encodeURI modes for query strings and full URLs. No sign-up required.

Barcode Generator & Reader — Code 128, EAN, UPC, Code 39 & ITF

Generate validated 1D barcodes as PNG files and decode barcode images locally in your browser. Supports Code 128, EAN-13, UPC-A, Code 39, and ITF.

Base64 File Converter — Free Online

Convert files to Base64 and Base64 back to files with this free online tool. Supports images, PDFs, and any binary file. No sign-up required.

Morse Code Translator — Text to Morse and Back

Convert text to Morse code and decode Morse back to text, with the ITU chart, prosigns, adjustable WPM timing, and audible playback.

HTML Entity Encoder & Decoder — Free Online

Encode and decode HTML entities instantly with this free online tool. Escape special characters to prevent XSS and display issues. No sign-up required.

Number Base Converter

Free online number base converter. Convert between binary, octal, decimal, hexadecimal, and any base from 2 to 36 instantly.

Roman Numeral Converter

Convert integers from 1 to 3999 into Roman numerals, or turn Roman letter strings back into numbers.

Text to Binary

Encode text as space-separated binary bytes, or decode pasted 8-bit binary groups back into basic character output.

Text to Unicode

Convert text into Unicode escape sequences, or decode pasted braced Unicode code-point escapes and uFFFF escapes back into characters.

.env / YAML / JSON Converter — Free Online

Convert between .env, JSON, and YAML formats instantly with this free online converter. Transform environment variable files, configuration formats, and dotenv files with one click.

Text Encoder Explorer — Unicode, UTF-8, UTF-16 Byte Inspector

Explore how text is encoded in UTF-8, UTF-16, and Unicode code points. View per-character byte breakdowns, hex dumps, and encoding statistics. Free online tool, runs entirely in your browser.

Web & Auth

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JWT & Bearer Token Inspector - Decode JSON Web Tokens

Free online JWT decoder and Bearer token inspector. Decode JWT headers, payloads, and check expiration claims instantly in your browser.

CSS Gradient Generator — Linear, Radial & Conic

Build linear, radial and conic CSS gradients with draggable colour stops, live preview and copyable CSS. No sign-up, runs in your browser.

CSS Box Shadow Generator — Layered & Inset Shadows

Build layered box-shadow and text-shadow CSS with live preview, inset support, elevation presets and copyable output.

CSS clip-path Generator — Visual Shape Editor

Draw polygon, circle, ellipse and inset clip-path shapes by dragging handles, then copy the CSS or load an existing value back into the editor.

CSS Specificity Calculator — Score & Compare Selectors

Score any CSS selector, see which part contributes what, and compare two selectors to find out which rule wins the cascade.

QR Code Generator & Reader

Free online QR code generator and reader. Create QR codes from text or URLs and decode QR codes from uploaded images instantly.

URL Parser - Parse & Analyze URL Components Online

Free online URL parser tool. Break down any URL into its components — protocol, hostname, port, path, query parameters, and hash fragment.

SEO Meta Auditor — GEO Content Checker

Audit HTML title, meta description, canonical URL, H1 count, and JSON-LD signals for SEO, GEO, and AI answer-engine readiness directly in your browser.

Webhook Signature Verifier

Verify SHA-256 HMAC webhook signatures for GitHub, Stripe, Slack, and custom API integrations locally in the browser.

CSP Evaluator

Evaluate Content-Security-Policy headers for unsafe directives, missing defaults, wildcard sources, and browser security hardening.

HTTP Request Builder

Import curl commands or visually build HTTP requests, then generate curl, fetch, axios, Python requests, Go net/http, C# HttpClient, and PHP cURL snippets.

HTTP Status Codes Reference - Complete Status Code Guide

Free online HTTP status codes reference. Search and browse all HTTP response status codes with descriptions, categories, and common use cases.

HTTP Cache Policy Builder

Build Cache-Control headers for browser caching, CDN caching, immutable assets, and API response freshness.

JWT JWK JWKS Inspector

Inspect JWK and JWKS public keys, kid values, algorithms, and OAuth/OIDC signing metadata directly in your browser.

Basic Auth Generator & Decoder - HTTP Authorization Header

Free online Basic Auth header generator and decoder. Create HTTP Basic Authorization headers from credentials or decode existing headers instantly.

HAR Analyzer

Analyze HAR files for request counts, response bytes, slow requests, status codes, and web performance debugging.

OAuth2 Debugger & PKCE Generator — RFC 7636

Decode JWT tokens, parse OAuth2 authorization URLs, and securely generate or verify RFC 7636 PKCE code verifiers and S256 challenges.

OG Meta Tag Preview

Free online Open Graph meta tag preview tool. See how your page looks on Google, Facebook, Twitter, and LinkedIn before publishing.

Open Graph and Twitter Card Generator

Generate HTML-escaped Open Graph, Twitter Card, title, and meta description tags for social sharing and SEO previews.

SRI Hash Generator

Generate Subresource Integrity sha256 and sha384 hashes for CDN scripts and stylesheets in the browser.

Cookie Parser

Free online cookie parser tool. Parse and inspect Set-Cookie headers and document.cookie strings to view names, values, and attributes.

CORS Header Checker

Free online CORS header checker and analyzer. Validate Access-Control headers, diagnose cross-origin issues, and verify preflight configuration.

OpenAPI / Swagger Viewer

Free online OpenAPI 3.x viewer. Paste YAML or JSON to visualize API endpoints, parameters, responses, and schemas. No sign-up required.

CSP Header Builder

Free online Content Security Policy (CSP) header builder and generator. Visually configure CSP directives, validate policies, and test URLs against your security rules.

SAML Response Decoder - Decode & Format SAML XML

Free online SAML response decoder. Decode Base64-encoded SAML responses, format the XML output, and inspect SSO assertions instantly.

robots.txt & Sitemap Validator - Validate Robots Rules & Sitemap XML Online

Free online robots.txt and sitemap.xml validator. Parse and validate robots.txt directives, test URL access rules, and verify sitemap XML structure, URLs, and metadata.

Safe Links Decoder

Extract the original destination URL from a Microsoft Safe Links style wrapped link without opening the target.

User-Agent Parser

Parse a user-agent string into browser, engine, OS and device, tell Chromium forks apart, and flag crawlers and automation tools.

HTTP Header Parser - Analyze & Inspect HTTP Headers Online

Free online HTTP header parser tool. Parse raw HTTP headers, inspect key-value pairs, and check security headers like CSP, HSTS, X-Frame-Options, and more.

Device Information - Browser, Screen & Hardware Details

View detailed device and browser information including user agent, screen resolution, GPU, CPU cores, memory, connection type, and more — all detected in real time.

Development

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Kubernetes YAML Validator & Manifest Linter

Parse multi-document Kubernetes YAML and find missing fields, container conflicts, invalid resources, and operational hardening opportunities.

OpenAPI Diff & Breaking Change Checker

Compare two OpenAPI 3 JSON or YAML documents and identify endpoint, parameter, response, and schema changes with breaking-change classification.

Regex Tester & Debugger

Free online regex tester to match, replace, and debug regular expressions with real-time highlighting and capture group support.

curl to Code Converter — Python, JavaScript, Go & More

Paste a curl command and get equivalent Python requests, fetch, axios, Go, PHP, Ruby, C# or PowerShell code. Runs in your browser.

Unix Timestamp Converter

Free online Unix timestamp converter to convert between epoch timestamps and human-readable dates in ISO, UTC, and local formats.

HTML to JSX Converter — Paste Markup, Get React

Convert HTML into valid JSX: class becomes className, inline styles become objects, void elements self-close, and comments are converted.

SemVer Range Tester — Check ^ and ~ Version Ranges

Expand npm version ranges into concrete comparators and see exactly which versions satisfy them, including prerelease handling.

SVG to JSX — Convert SVG into a React Component

Turn SVG markup into a ready-to-paste React component with camelCase props, currentColor theming, TypeScript typings, and a safe preview.

Code Minifier — Shrink CSS, JavaScript and HTML

Remove comments and redundant whitespace from CSS, JavaScript or HTML in your browser, and see exactly how many bytes each change saves.

Color Converter & Picker

Free online color converter and picker tool to convert between HEX, RGB, and HSL formats with a visual color preview.

Crontab Generator, Explainer & Next Run Calculator

Build and explain five-field Unix cron expressions, calculate timezone-aware future runs, inspect DST behavior, and follow a live countdown.

Text, JSON & YAML Diff Viewer

Compare text, JSON, or YAML side by side or as a unified diff. Structured modes parse, recursively sort keys, and expose meaningful changes.

IEEE 754 Float Inspector — Bits, Exponent & Rounding

See the sign, exponent and mantissa bits of any float32 or float64 value, the exact stored result, the rounding error and the adjacent representable values.

Structured Log & NDJSON Explorer

Parse mixed NDJSON, JSON Lines, logfmt, and Apache or nginx access logs locally, then filter, summarize, and export matching events.

Font Inspector & Subsetter — Inspect TTF/OTF Glyphs

Inspect TTF and OTF font metadata, supported characters, metrics, and glyph counts, then build a smaller subset font from the exact text you need.

Text Case & Format Converter

Free online text case converter to transform text between camelCase, snake_case, PascalCase, kebab-case, and 10+ other formats instantly.

Chmod Permission Calculator

Free online chmod calculator to set Unix/Linux file permissions. Convert between octal, symbolic notation, and get the chmod command instantly.

Docker Run to Compose Converter

Free online tool to convert docker run commands to docker-compose.yml format. Instantly transform container commands into composable YAML configurations.

Code Formatter — Prettier Online

Free online code formatter powered by Prettier. Format JavaScript, TypeScript, HTML, Vue, CSS, SCSS, JSON, YAML, Markdown, and GraphQL with customizable options. No sign-up required.

Fake Data Generator

Generate 1–100 realistic fake values for testing and development, with exact whole-number count validation, multiple data types, locales, and output formats.

URL Slug Generator

Free online URL slug generator. Convert any text to SEO-friendly, URL-safe slugs with customizable separators, case options, and length limits.

CSS Unit Converter

Free online CSS unit converter. Convert between px, rem, em, pt, %, vw, and vh with customizable base font size and viewport dimensions.

Lorem Ipsum Generator

Free online Lorem Ipsum placeholder text generator. Generate dummy text by paragraphs, sentences, or words for mockups and designs.

Mermaid Live Editor — Diagram Generator

Free online Mermaid diagram editor. Create flowcharts, sequence diagrams, class diagrams, Gantt charts, pie charts, and mind maps. Export to SVG or PNG. No sign-up required.

Accessibility Color Contrast Checker

Free online WCAG color contrast checker. Calculate contrast ratios, verify AA/AAA compliance, preview text readability, and simulate color blindness for accessible design.

Date-Time Converter with Timezone Support

Free online date-time converter to convert dates and times across timezones. Supports ISO 8601, RFC 2822, Unix timestamps, and relative time — powered by native Intl APIs.

Git Cheatsheet - Quick Command Reference & Memo

Free online Git cheatsheet with searchable commands organized by category. Quickly find Git commands for branching, merging, rebasing, stashing, resetting, and more.

Git Commit Message Generator

Free online Git commit message generator using the Conventional Commits format. Build structured commit messages with type, scope, description, body, breaking changes, and footer fields.

Keycode Info

Capture a browser keydown event and inspect key, code, keyCode, location, and modifier flags for keyboard shortcut debugging.

MIME Type Lookup

Look up common file extension to MIME type mappings, or reverse a MIME type into the built-in list of matching extensions.

Nginx Config Generator

Free online Nginx configuration file generator. Build server blocks with SSL, reverse proxy, gzip, security headers, WebSocket support, and more — no manual editing required.

PDF Signature Checker

Inspect an uploaded PDF for signature dictionaries, ByteRange entries, SubFilter values, and embedded signature contents.

Dockerfile Linter

Analyze your Dockerfile for best practices, security issues, and optimization opportunities with instant feedback and actionable suggestions.

FILETIME & LDAP Timestamp Converter

Free online FILETIME and LDAP/Active Directory timestamp converter. Convert 18-digit Windows FILETIME to human-readable dates and back. Live clock included.

Color Space Explorer — OKLCH, OKLab, P3 & More

Free online extended color space converter. Convert between HEX, RGB, HSL, HWB, OKLab, OKLCH, Linear sRGB, and Display P3 with CSS output. No sign-up required.

Tailwind CSS Class Sorter — Organize Utility Classes

Free online Tailwind CSS class sorter. Organize utility classes following the official recommended order with duplicate removal. No sign-up required.

Benchmark Builder — JavaScript Performance Testing

Compare synchronous JavaScript snippets in disposable local workers with time limits, operations-per-second metrics, and visual results.

Figma Token Converter — Design Tokens to CSS/Tailwind

Free online Figma design token converter. Transform JSON design tokens to CSS custom properties, SCSS variables, Tailwind config, or JS exports. No sign-up required.

GraphQL Playground — Schema Validator & Query Formatter

Free online GraphQL playground. Validate queries against your schema, format GraphQL queries, and inspect schema types. Works offline, no sign-up required.

Network

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WebSocket and SSE Connection Tester

Connect to WebSocket or SSE endpoints and inspect a timestamped live transcript.

DNS Propagation Comparator — Compare dig Output Across Resolvers

Paste dig output from several resolvers and compare answers, TTLs, and response codes to see whether a DNS change has propagated. No query is sent from this page.

Punycode & IDN Converter — Decode xn-- Domains

Convert internationalized domain names to Punycode and back, inspect each label, and spot mixed-script names used for spoofing.

CIDR Calculator & Subnet Visualizer

Free online CIDR calculator. Compute network address, broadcast, subnet mask, host range, and total hosts from any CIDR notation.

IPv4 Address Converter

Convert one dotted IPv4 address into decimal, uppercase hex, dotted binary, and IPv6-mapped notation.

IPv4 Range Expander

Summarize a start-to-end IPv4 range, count addresses, and expand smaller ranges into individual dotted-decimal addresses.

IPv6 ULA Generator

Create a random RFC 4193 Unique Local Address prefix and first subnet for private IPv6 labs, docs, and internal network plans.

MAC Address Generator

Generate 1 to 100 random colon-separated MAC addresses, with an optional hexadecimal prefix for lab fixtures and test data.

MAC Address Lookup

Normalize a MAC address, identify its OUI vendor, read the administration and cast bits, and derive its modified EUI-64 and IPv6 link-local address.

Random Port Generator

Generate a sorted list of random user-space TCP or UDP port numbers between 1024 and 65535.

Text

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LLM Token Counter and Context Planner

Count OpenAI tokens exactly and plan prompts, output reserves, context limits, and estimated API cost.

Unicode Normalization & Confusable Character Inspector

Compare NFC, NFD, NFKC, and NFKD text, detect mixed scripts, invisible and bidi controls, and inspect common Unicode lookalikes.

Markdown Preview & Editor

Free online Markdown editor with live preview. Write and preview Markdown with GFM support, tables, code blocks, and more — all in your browser.

List Converter

Trim, deduplicate, and alphabetically sort newline-separated list items so copied data is easier to clean up and reuse.

Markdown Table Generator — Free Online GFM Table Builder

Generate well-formatted GitHub Flavored Markdown (GFM) tables with an interactive visual editor. Set column alignment, add or remove rows and columns, and copy the output instantly.

Numeronym Generator

Turn longer words into numeronyms such as i18n and a11y by keeping the first and last letters and counting the middle.

String Obfuscator

Mask the middle of each line with asterisks while keeping a small prefix and suffix visible for safer sharing.

Text Statistics

Count characters, words, lines, and UTF-8 bytes for pasted text so you can size content before reuse.

Text to NATO Alphabet

Spell letters and digits with NATO phonetic alphabet words, while preserving punctuation and marking spaces with slashes.

Emoji Picker & Search

Browse, search, preview, and copy 462 emojis using localized names and search terms, categories, and private recent history.

ASCII Text Drawer / Art Generator

Free online ASCII art text generator. Convert any text into large block letters, shadow art, or simple ASCII banners — no external libraries required.

Email Normalizer

Normalize and deduplicate email addresses by removing dots, plus aliases, and provider-specific suffixes to find canonical forms.

Unicode Character Lookup — Code Point Inspector

Free online Unicode character lookup tool. Inspect text to see code points, UTF-8/UTF-16 encoding, Unicode block, and category. Search by U+ code point. No sign-up required.

HTML WYSIWYG Editor — Rich Text to HTML

Free online WYSIWYG HTML editor. Create rich text content with formatting tools and get clean HTML output. Supports headings, lists, code blocks, blockquotes, and more. No sign-up required.

Data Formats

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JSON Formatter & Viewer — Free Online

Format, prettify, minify, and validate JSON instantly with this free online JSON formatter. Adjust indentation, sort keys, and view stats in real time.

XML Formatter & Validator — Pretty Print, Minify, Convert

Format, minify, and validate XML in your browser with exact error positions, then convert between XML and JSON. No upload, no sign-up.

SQL Test Data & INSERT Generator

Generate deterministic multi-row INSERT statements from field definitions or JSON for PostgreSQL, MySQL, and SQLite.

JSON Patch Generator & Applier — RFC 6902

Generate RFC 6902 JSON Patch operations from two documents, apply and validate existing patches, create inverse patches, and copy JSON Pointer paths locally.

Data Format Converter — Free Online

Convert between JSON, YAML, TOML, and CSV instantly with this free online data format converter. Swap formats with one click, no sign-up required.

Avro, CBOR, and MessagePack Binary Inspector

Encode JSON to Avro, CBOR, or MessagePack and decode hex or Base64 binary data with byte counts and reviewable typed values.

JSONPath Tester — Query JSON Responses

Test JSONPath expressions against JSON data in your browser. Extract values from API responses, logs, configuration files, and AI-generated JSON payloads.

Local SQLite & Parquet Explorer

Inspect SQLite databases and preview Parquet files entirely in your browser, with read-only SQL queries and CSV or JSON export.

API Mock Data Generator — JSON Test Payloads

Generate deterministic JSON mock data for frontend development, API contracts, tests, documentation, and AI-assisted prototyping directly in your browser.

JSON Schema Generator & Validator — Free Online

Generate JSON Schema from sample data or validate JSON against a schema with this free online tool. Uses Ajv for validation. No sign-up required.

CSV Viewer & Editor — Free Online

View, edit, sort, and export CSV data in a spreadsheet-like table. Supports custom delimiters (comma, tab, semicolon, pipe). Powered by PapaParse — no data leaves your browser.

SQL Formatter & Beautifier — Free Online

Format, beautify, and pretty-print SQL queries instantly. Supports MySQL, PostgreSQL, SQLite, T-SQL, PL/SQL, MariaDB, BigQuery, and standard SQL with customizable indentation and keyword casing.

IBAN Validator and Parser

Validate an IBAN with a Mod 97 checksum check, normalize spacing, and extract the country code and check digits directly in your browser.

Phone Parser and Formatter

Parse a phone number into its E.164 form, calling code and national number, without ever guessing a country the input did not state.

Protobuf to JSON Converter

Free online Protocol Buffers (Protobuf) to JSON converter. Encode JSON to Protobuf binary and decode Protobuf binary back to JSON. Paste your .proto schema and data. No sign-up required.

Images & Videos

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Image Compare & Pixel Diff — Overlay Screenshots Locally

Compare two images with an overlay slider or threshold-based pixel diff, measure changed pixels, locate the bounding box, and download a diff PNG.

Image Cropper — Crop Photos in Your Browser

Crop JPG, PNG, WebP, GIF or AVIF images with draggable handles and locked aspect ratios. Everything is processed on your device, never uploaded.

Image Resizer & Target File Size Compressor

Resize images locally and hit common upload limits like 20 KB, 50 KB, 100 KB, 200 KB, 500 KB, or 1 MB with JPEG and WebP target-size search.

Document Scan Cleanup — Crop, Straighten & Clean Paper Photos

Clean up photographed documents in your browser with manual crop margins or crop rectangles, 90-degree rotation, bounded straightening, grayscale, contrast, brightness, thresholded black-and-white output, paper background cleanup, and JPEG or PNG export.

Background Remover — Transparent PNG Maker

Signature Image Maker — Crop & Clean Signature Photos

Upload a signature photo, detect paper bounds, clean it to grayscale ink, choose a transparent or white background, resize it for forms, and export PNG or JPEG locally.

EXIF Metadata Remover — Photo Privacy Tool

Remove EXIF metadata from JPEG photos in your browser, including GPS location, camera model, timestamp, and editing software tags when stored in EXIF segments.

HEIC HEIF Converter — Batch to JPEG or PNG in Your Browser

Convert HEIC and HEIF photos to JPEG or PNG locally in your browser with batch limits, per-file errors, preview cards, JPEG quality control, and individual or all-file downloads.

Color Palette Extractor from Image

Extract dominant colors from images locally in your browser and export palettes as HEX values or CSS variables for UI design, game assets, and AI-generated artwork.

SVG to PNG and Icon Converter

Convert SVG markup to PNG icons in common favicon and app-icon sizes directly in your browser. Export 16, 32, 180, 192, and 512 px icon images.

Passport Photo Maker — Local Guides, File Targets, and Print Sheets

Create passport, visa, and ID photo exports locally in your browser with reviewed country presets, manual head-position guides, JPEG file-size targets, and 4x6 or A4 print sheets.

Sprite Sheet Cutter — Game Asset Slicer

Slice sprite sheets and texture atlases into individual frames in your browser. Use grid rows and columns to export game sprites, UI icons, and animation frames.

Power-of-Two Texture Resizer for Game Assets

Resize textures and images to power-of-two dimensions such as 256, 512, 1024, or 2048 for WebGL, Unity, Godot, Unreal, and game asset pipelines.

SVG Optimizer & Viewer — SVGO Online

Optimize SVG locally with SVGO, compare sanitized previews, then copy or download the exact optimized result. Your SVG stays in your browser.

Favicon Generator — Multi-Size Icon Creator

Free online favicon generator. Upload an image to create favicons in all standard sizes (16x16 to 512x512) with HTML and manifest snippets. No sign-up required.

Image/Color Placeholder Generator

Free online placeholder image generator. Create custom colored placeholder images with text overlay in SVG or PNG format for mockups, wireframes, and prototyping.

Video Toolbox - Metadata, Frame Extractor & GIF Maker

Inspect video metadata, save an exact frame as PNG or JPEG, or turn a short clip into an animated GIF. MP4, WebM, Ogg, MOV, and M4V files stay in your browser.

Camera Recorder — Webcam Video Capture

Free online camera recorder. Record video from your webcam with optional audio, pause/resume, and download as WebM. No sign-up, runs in your browser.

Math

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Compound Interest Calculator with Yearly Growth Projection

Estimate compound growth from an initial balance, recurring contributions, contribution timing, compounding frequency, rate, and years with a yearly projection table.

Loan Amortization Calculator & Extra Payment Schedule

Calculate fixed-rate loan payments, total interest, a full amortization schedule, and the payoff impact of recurring extra monthly principal.

Paycheck Estimator for Salary, Hourly Pay, Taxes, and Deductions

Estimate gross-to-net pay from salary or hours, overtime, pre-tax deductions, entered tax rates, and post-tax deductions. Results are not official payroll advice.

Savings Goal Calculator for Monthly Contribution or Time to Goal

Set a savings target, current balance, and APY, then solve for the missing monthly contribution or the estimated time needed to reach the goal.

Mortgage Comparison Calculator for Monthly and Lifetime Cost

Compare two mortgage scenarios side by side, including loan amount, rate, term, fees, taxes, insurance, monthly payment, and lifetime cost differences.

VAT & GST Calculator for Tax-Inclusive or Tax-Exclusive Prices

Add or extract VAT or GST, compare multiple tax rates at once, and review net, tax, and gross amounts without jurisdiction-specific legal claims.

APR Fee Calculator for Loan Origination and Recurring Charges

Estimate how upfront and recurring loan fees change the effective APR, monthly cost, and net funds received. Results are clearly labeled as estimates.

Statistics Calculator

Calculate count, sum, mean, median, min, max, variance, and standard deviation from numeric datasets.

Matrix Calculator

Calculate matrix transpose, determinant, row and column sizes from rectangular, finite-number matrices.

Quadratic Equation Solver

Solve ax² + bx + c quadratic equations, calculate discriminants, and return real or complex roots.

Prime Factorization Calculator

Factor integers into primes for number theory, coding challenges, cryptography learning, and math homework checks.

Math Evaluator

Evaluate arithmetic expressions with correct operator precedence and a fixed set of math functions, parsed in the page rather than executed as code.

Percentage Calculator

Free online percentage calculator. Compute X% of Y, find what percent X is of Y, calculate percentage change, and increase or decrease values by a percentage.

Measurement

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