# Online Developer Tools > Free online developer tools for debugging, formatting and validation needs. Access 10+ utilities to help boost your day-to-day productivity. All tools run entirely client-side in the browser: no registration, and no user data is sent to any server. Site root: https://tools.codesamplez.com/ ## Code Formatters & Validators - [JSON Formatter](https://tools.codesamplez.com/json-formatter/): Format, validate, and minify JSON data with selectable indentation and alphabetical key sorting. Features tree view, error detection, and clipboard integration. - [JavaScript Minifier](https://tools.codesamplez.com/js-minifier/): Minify JavaScript code by removing comments, whitespace, and optionally shortening variable names (minification). Features real-time size statistics and clipboard integration. - [CSS Minifier](https://tools.codesamplez.com/css-minifier/): Minify CSS code by removing unnecessary whitespace, comments, and optimizing style declarations (minification). Features real-time size reduction statistics and clipboard support. ## Encoders & Decoders - [Base64 Converter](https://tools.codesamplez.com/base64-converter/): Convert text and files to Base64 encoding and decode Base64 strings back to their original format. Supports multiple encodings and file uploads. - [JWT Decoder & Validator](https://tools.codesamplez.com/jwt-decoder/): Decode and validate JSON Web Tokens (JWT). Inspect header, payload, and verify signatures with your secret key for token authenticity. - [JWT Builder](https://tools.codesamplez.com/jwt-builder/): Create and sign JSON Web Tokens (JWT) with custom headers and payloads. Generate secure tokens with various signing algorithms and secret keys. - [QR Code Generator](https://tools.codesamplez.com/qr-code-generator/): Generate QR codes from any text input or URL. Customize QR code size, margin, and error correction level. - [Data Format Converter](https://tools.codesamplez.com/data-format-converter/): Convert between JSON, XML, and YAML formats with real-time conversion. Perfect for working with different API formats and configuration files. ## Text Analysis & Diff Tools - [Diff Checker](https://tools.codesamplez.com/diff-checker/): Compare two texts side by side and highlight the differences (diff). Perfect for comparing code snippets, configurations, or any text-based content. - [Text Analyzer](https://tools.codesamplez.com/text-analyzer/): Analyze text to get insights like character count, word count, line count, and other useful text statistics. Perfect for content writers and developers. ## Metadata - [Sitemap](https://tools.codesamplez.com/sitemap.xml): XML sitemap listing every tool page