Tools

• Notepad

  Retro Windows-like Notepad application. Full-screen distraction-free text editor with multi-tab support, offline file picker, Word Wrap, and localStorage state persistence.

• JWT Decoder

  Decode JSON Web Tokens (JWT) in real-time, view headers and payloads, and format token timestamps into human-readable local dates.

• JSON Formatter

  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.

• Text Compare

  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.

• QR Code Generator

  Create custom QR codes as high-quality PNG images or vector SVGs with custom colors, margins, and sizes.

• YAML ↔ JSON Converter

  Convert YAML data to JSON and JSON data to YAML in real-time with syntax validation, minification, and copy features.

• CSV ↔ JSON Converter

  Convert CSV data to JSON and JSON data to CSV in real-time with custom delimiters, formatting, and copy features.

• Regex Tester

  Test and debug regular expressions with live match highlighting, capture group inspection, and flag toggles — entirely in your browser, no server required.

• Text Counter & Analyzer

  Live word, character, and line counter with tools to sort lines, remove duplicates, and reverse text.

• Barcode Generator

  Create custom, high-resolution vector barcodes in formats like Code 128, Code 39, EAN, and UPC with real-time downloads.

• HTML Encoder/Decoder

  Encode and decode HTML entities, format numeric or named entities, and prevent HTML/XSS injection.

• XML ↔ JSON Converter

  Convert XML data to JSON and JSON data to XML in real-time with syntax validation, formatting, and copy features.

• URL Encoder/Decoder

  Encode plain text into percent-encoded URL strings or decode them back — handles special characters, Unicode, and query parameters instantly in your browser.

• URL Parser

  Parse and analyze URLs in real-time, inspect protocols, hostnames, and paths, and interactively edit query parameters to rebuild URLs instantly.

• Base64 Encoder/Decoder

  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.

• JWT Inspector

  Decode, inspect, edit, and cryptographically re-sign JSON Web Tokens (JWT) in real-time with signature verification.

• Text Case Converter

  Convert text or variable names between camelCase, PascalCase, snake_case, kebab-case, UPPER CASE, Title Case, and sentence case instantly in your browser.

• Color Picker & Converter

  Convert color spaces between HEX, RGB, HSL, and HSV in real-time, pick custom colors, and generate harmonic palettes.

• Cryptographic Hash Generator

  Generate secure cryptographic checksums (MD5, SHA-1, SHA-256, SHA-384, SHA-512), DES symmetric encryptions, and RSA-2048 digital signatures in real-time.

• XML Formatter

  Format, minify, and validate XML in your browser — syntax highlighting, real-time error detection, and one-click copy. No uploads, no server, works offline.

• Vehicle VIN Decoder

  Decode any 17-digit Vehicle Identification Number (VIN) in real-time, inspect country of origin, model year, manufacturer, and verify the mathematical check digit checksum.

• Country Code Lookup

  Search and lookup ISO country codes (Alpha-2, Alpha-3, Numeric), international dial codes, capitals, currencies, and flags in real-time.

• Book ISBN Validator

  Mathematically validate ISBN-10 and ISBN-13 book codes, verify check digits, and lookup real-time book metadata via Open Library.

• Morse Code Converter

  Convert text to Morse code and Morse code to text in real-time, and synthesize real Morse audio beeps using native Web Audio.

• NATO Phonetic Alphabet Converter

  Convert text into the official NATO phonetic radio spelling alphabet with pronunciation guides and speech synthesis.

• Phone Number Formatter

  Format phone numbers into standard National, International, E.164, and TEL URI formats in real-time with country-specific rules.

• Merge PDFs

  Merge and combine multiple PDF files in your browser completely offline using pdf-lib. No server uploads, total privacy.

• Split PDF

  Split PDF files into individual pages, split in half, or extract custom page ranges completely offline in your browser using pdf-lib.

• Rotate PDF

  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 PDF Pages

  Extract specific pages or page ranges from any PDF document, or invert selection to delete pages, completely offline using pdf-lib.

• Convert Images to PDF

  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 to Images

  Convert PDF documents into high-quality PNG or JPEG images completely in your browser. Render crisp page canvases and download them offline.

• Interactive PDF Viewer

  View and read PDF documents directly in your browser with complete privacy. Features page navigation, zoom controls, and fit-to-width rendering completely offline.

• ZIP File Creator

  Create, package, and compress multiple files and folders into a downloadable ZIP archive completely offline in your browser using JSZip.

• ZIP File Extractor

  Extract, inspect, and preview the contents of any ZIP archive completely offline in your browser. Download individual files or extract all.

• MAC Address Formatter

  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.

• Unix Permissions Calculator

  Interactive chmod permissions calculator. Select checkboxes, enter octal values, or input symbolic strings to calculate Unix file/directory permissions instantly.

• Cron Expression Builder

  Interactive Cron expression builder. Select presets, toggle interactive crontab parameters, translate schedules to plain English, and calculate next execution runs instantly.

• Cron Parser

  Parse, validate, and debug crontab expression lines. Extract cron parameters and commands, translate schedules to plain English, and view next run executions.

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