Tools
Compare two blocks of text side-by-side or inline, with word-level and line-level diff highlighting for insertions, deletions, and changes — runs offline in your browser.
Format, validate, and beautify JSON with syntax highlighting, 2- or 4-space indentation, and one-click minification. Runs entirely in your browser — no uploads, no sign-up.
Decode JSON Web Tokens in real-time, view headers and payloads, and format timestamps into human-readable local dates — entirely in your browser, no uploads.
Retro Windows-like Notepad with full-screen editing, multi-tab support, offline file picker, Word Wrap, and localStorage persistence — no uploads, 100% private.
Convert YAML data to JSON and JSON data to YAML in real-time with syntax validation and minification — entirely in your browser, no uploads.
Convert CSV data to JSON and JSON data to CSV in real-time with custom delimiters and formatting — entirely in your browser, no uploads.
Create custom QR codes as high-quality PNG images or vector SVGs with custom colors, margins, and sizes — entirely in your browser, no uploads.
Test and debug regular expressions with live match highlighting, capture group inspection, and flag toggles — entirely in your browser, no server required.
Live word, character, and line counter with tools to sort lines, remove duplicates, and reverse text — entirely in your browser, no uploads.
Create custom, high-resolution vector barcodes in Code 128, Code 39, EAN, and UPC formats with real-time downloads — entirely in your browser, no uploads.
Encode and decode HTML entities, format numeric or named entities, and prevent HTML/XSS injection — entirely in your browser, no uploads.
Convert XML data to JSON and JSON data to XML in real-time with syntax validation and formatting — entirely in your browser, no uploads.
Encode plain text into percent-encoded URL strings or decode them back — handles special characters, Unicode, and query parameters instantly in your browser.
Parse and analyze URLs in real-time, inspect protocols, hostnames, and paths, and interactively edit query parameters to rebuild URLs — entirely in your browser, no uploads.
Encode plain text or binary data to Base64 and decode Base64 back to UTF-8 — handles special characters and symbols entirely in your browser with zero network requests.
Decode, inspect, edit, and cryptographically re-sign JSON Web Tokens in real-time with signature verification — entirely in your browser, no uploads.
Convert text or variable names between camelCase, PascalCase, snake_case, kebab-case, UPPER CASE, Title Case, and sentence case instantly in your browser.
Convert color spaces between HEX, RGB, HSL, and HSV in real-time, pick custom colors, and generate harmonic palettes — entirely in your browser, no uploads.
Generate secure cryptographic checksums (MD5, SHA-1, SHA-256, SHA-512), DES encryptions, and RSA-2048 signatures in real-time — entirely in your browser, no uploads.
Format, minify, and validate XML in your browser — syntax highlighting, real-time error detection, and one-click copy. No uploads, no server, works offline.
Decode any 17-digit Vehicle Identification Number (VIN) in real-time, inspect country of origin, model year, manufacturer, and verify the check digit — entirely in your browser, no uploads.
Search and lookup ISO country codes (Alpha-2, Alpha-3, Numeric), international dial codes, capitals, currencies, and flags — runs entirely in your browser, no uploads.
Mathematically validate ISBN-10 and ISBN-13 book codes and verify check digits entirely in your browser — optionally lookup book metadata via Open Library.
Convert text to Morse code and Morse code to text in real-time, and synthesize real Morse audio beeps using native Web Audio — no uploads, runs in your browser.
Convert text into the official NATO phonetic radio spelling alphabet with pronunciation guides and speech synthesis — entirely in your browser, no uploads.
Format phone numbers into National, International, E.164, and TEL URI formats in real-time with country-specific rules — entirely in your browser, no uploads.
Merge and combine multiple PDF files in your browser completely offline using pdf-lib. No server uploads, total privacy.
Split PDF files into individual pages, split in half, or extract custom page ranges completely offline in your browser using pdf-lib.
Rotate PDF files 90, 180, or 270 degrees clockwise. Select individual pages, odd/even pages, or the entire document to rotate and download offline.
Extract specific pages or page ranges from any PDF document, or invert selection to delete pages, completely offline using pdf-lib.
Convert JPEG and PNG images into a single PDF document. Re-order files, customize page sizes, margins, and download completely offline using pdf-lib.
Convert PDF documents into high-quality PNG or JPEG images completely in your browser. Render crisp page canvases and download them offline.
View and read PDF documents directly in your browser with complete privacy. Features page navigation, zoom controls, and fit-to-width rendering completely offline.
Create, package, and compress multiple files and folders into a downloadable ZIP archive completely offline in your browser using JSZip.
Extract, inspect, and preview the contents of any ZIP archive completely offline in your browser. Download individual files or extract all.
Format, sanitize, and validate MAC addresses (MAC-48, EUI-64) into IEEE colon, hyphen, Cisco dot, binary, or raw hex, with client-side OUI vendor lookup.
Interactive chmod permissions calculator — select checkboxes, enter octal values, or input symbolic strings to calculate Unix file/directory permissions instantly in your browser.
Interactive Cron expression builder — select presets, toggle parameters, translate schedules to plain English, and calculate next execution runs instantly in your browser.
Parse, validate, and debug crontab expression lines — extract parameters, translate schedules to plain English, and view next run executions instantly in your browser.
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