# Dev Tools > Fast, free developer utilities that run directly in the browser. Tool inputs are processed locally and are not uploaded by Dev Tools. ## Tools - [Base Converter](https://piyushdoorwar.github.io/dev-tools/base-converter/): Convert UTF-8 text and byte values between binary, hexadecimal, decimal, and octal representations instantly in your browser. - [Crypto Generator](https://piyushdoorwar.github.io/dev-tools/crypto-generator/): Generate cryptographically secure random values and developer-friendly credentials locally with your browser's security APIs. - [Fake Data Generator](https://piyushdoorwar.github.io/dev-tools/fake-data-generator/): Design a schema and generate realistic JSON test records with names, addresses, IDs, dates, numbers, and nested fields. - [File Compressor](https://piyushdoorwar.github.io/dev-tools/file-compressor/): Compress files locally in your browser with multiple algorithms while comparing original and compressed sizes before download. - [HTML Preview](https://piyushdoorwar.github.io/dev-tools/html-preview/): Write HTML, CSS, and JavaScript in a live browser playground with an instant preview and downloadable output. - [Image Converter](https://piyushdoorwar.github.io/dev-tools/image-converter/): Convert PNG, JPEG, WebP, SVG, and BMP images locally, control output quality, and optionally remove standard metadata. - [ID Generator](https://piyushdoorwar.github.io/dev-tools/id-generator/): Generate and inspect developer identifiers including UUID variants and ULIDs directly in your browser. - [JSON Diff](https://piyushdoorwar.github.io/dev-tools/json-diff/): Compare two JSON documents with formatting, validation, and clear structural difference highlighting. - [JSON to Toon Converter](https://piyushdoorwar.github.io/dev-tools/json-toon-converter/): Convert standard JSON data into compact Toon format locally with validation and copy-ready output. - [JSON to XML Converter](https://piyushdoorwar.github.io/dev-tools/json-to-xml-converter/): Convert JSON documents into formatted XML locally with validation and convenient editing controls. - [JWT Debugger](https://piyushdoorwar.github.io/dev-tools/jwt-debugger/): Decode, inspect, edit, and verify JSON Web Tokens with readable header, payload, signature, and timestamp details. - [Markdown Editor](https://piyushdoorwar.github.io/dev-tools/markdown-editor/): Write Markdown with synchronized editing, safe live preview, local file opening, and export-friendly controls. - [QR Generator](https://piyushdoorwar.github.io/dev-tools/qr-generator/): Create customizable QR codes for links, contact details, Wi-Fi, email, phone, UPI, and other common formats. - [Regex Tester](https://piyushdoorwar.github.io/dev-tools/regex-tester/): Test regular expressions with live match highlighting, flags, capture details, navigation, and replacement templates. - [SQL Formatter](https://piyushdoorwar.github.io/dev-tools/sql-formatter/): Format and beautify SQL queries locally with readable indentation and practical editor controls. - [Text Diff](https://piyushdoorwar.github.io/dev-tools/text-diff/): Compare text side by side with added, removed, modified, and character-level differences clearly highlighted. - [Toon to JSON Converter](https://piyushdoorwar.github.io/dev-tools/toon-to-json-converter/): Convert Toon data into standard formatted JSON locally with validation and copy-ready output. - [Unit Converter](https://piyushdoorwar.github.io/dev-tools/unit-converter/): Convert common measurements across length, area, volume, mass, temperature, time, speed, data, and more. - [XML to JSON Converter](https://piyushdoorwar.github.io/dev-tools/xml-to-json-converter/): Convert XML documents into readable JSON locally with validation and convenient formatting controls. ## Additional resources - [Homepage](https://piyushdoorwar.github.io/dev-tools/): Browse and search the complete tool collection. - [Sitemap](https://piyushdoorwar.github.io/dev-tools/sitemap.xml): Canonical index of all public tool routes. - [Source code](https://github.com/piyushdoorwar/dev-tools): Project source and documentation.