# DevToolHub > DevToolHub is a professional suite of 100% browser-side developer tools designed with a privacy-first architecture. It provides secure, high-performance utilities for formatting, validating, and converting data without ever transmitting sensitive information to a server. ## Core Developer Tools - [JSON Formatter & Validator](https://devtoolhub.site/): Professional-grade JSON pretty-printer with syntax validation and tree-view exploration. - [Base64 Encoder](https://devtoolhub.site/base64-encode): Securely convert text or binary data to Base64 format locally. - [Base64 Decoder](https://devtoolhub.site/base64-decode): Restore Base64 strings to human-readable text or binary blobs. - [HTML Formatter & Beautifier](https://devtoolhub.site/html-formatter): Clean up and standardize messy HTML markup with intelligent indentation. - [HTML Minifier](https://devtoolhub.site/html-minifier): Optimize web performance by compressing HTML code securely. - [XML Formatter & Beautifier](https://devtoolhub.site/xml-formatter): Enterprise-grade XML pretty-printing with namespace support. - [SQL Formatter](https://devtoolhub.site/sql-formatter): Standardize SQL queries with proper casing and hierarchical indentation. - [JWT Debugger](https://devtoolhub.site/jwt-debugger): Decode and inspect JSON Web Tokens (JWT) safely in your browser. - [JSON to TypeScript](https://devtoolhub.site/json-to-typescript): Generate production-ready TypeScript interfaces from JSON payloads. - [JSON to CSV](https://devtoolhub.site/json-to-csv): Flatten hierarchical JSON data into tabular CSV format for Excel/Sheets. - [RegEx Tester](https://devtoolhub.site/regex-tester): Real-time regular expression testing and debugging with match highlighting. - [URL Encoder](https://devtoolhub.site/url-encode): Convert text to web-safe, percent-encoded URI strings. - [URL Decoder](https://devtoolhub.site/url-decode): Restore percent-encoded strings to original plain text. - [UUID/GUID Generator](https://devtoolhub.site/uuid-generator): Bulk generate secure, Version 4 unique identifiers. - [Markdown Previewer](https://devtoolhub.site/markdown-preview): Secure, live GitHub Flavored Markdown (GFM) editor and previewer. ## Technical Architecture & Privacy - **Client-Side Processing:** All tools execute 100% in the user's browser using local JavaScript and Web Workers. - **Zero-Trust Security:** No data is ever uploaded, logged, or cached on the server, making it safe for PII and proprietary code. - **Performance:** Optimized for speed with zero network latency for data transformations. ## Metadata & Support - [About DevToolHub](https://devtoolhub.site/about): Our mission and privacy-first philosophy. - [Contact](https://devtoolhub.site/contact): Reach out for support or feedback. - [Privacy Policy](https://devtoolhub.site/privacy): Detailed information on our data handling practices. - [Terms of Service](https://devtoolhub.site/terms): Usage guidelines for the platform.