Developer Tools
Format, minify, encode, debug code, convert data formats, and optimize for SEO. Essential developer utilities.
ToolsHub packs 33+ free developer tools into a single, ad-light interface that respects your workflow. From formatting messy JSON to minifying production CSS, from decoding JWTs to generating UUIDs, every tool is built to save you time and keep your data private.
Our formatters and minifiers support JSON, HTML, CSS, JavaScript, SQL, and XML with syntax highlighting and one-click copy. Data-conversion tools let you move between CSV, JSON, XML, and YAML effortlessly. And our SEO toolkit — including Meta Tag, OpenGraph, Robots.txt, and Sitemap generators — helps you ship search-engine-friendly sites faster.
Whether you're debugging a regex pattern, encoding a string to Base64, checking password strength, or testing responsive layouts, ToolsHub has a purpose-built utility ready to go. All tools work offline after the initial page load, making them ideal for use on flights, in coffee shops, or anywhere with spotty connectivity.
All Developer Tools
33 toolsJSON Formatter
Format, validate, and beautify JSON data with syntax highlighting.
JSON Minifier
Minify JSON data to reduce file size.
XML Formatter
Format and beautify XML data with proper indentation.
XML Minifier
Minify XML data to reduce file size.
HTML Formatter
Format and beautify HTML code with proper indentation.
HTML Minifier
Minify HTML code to reduce file size.
CSS Formatter
Format and beautify CSS code with proper indentation.
CSS Minifier
Minify CSS code to reduce file size and improve load times.
JavaScript Formatter
Format and beautify JavaScript code.
JavaScript Minifier
Minify JavaScript code to reduce file size.
SQL Formatter
Format and beautify SQL queries with proper indentation.
SQL Minifier
Minify SQL queries to reduce size.
Regex Tester
Test and debug regular expressions with real-time matching.
JWT Decoder
Decode and inspect JSON Web Tokens.
Base64 Encoder/Decoder
Encode or decode text and files to/from Base64 format.
URL Encoder/Decoder
Encode and decode URL strings.
Markdown Editor
Write and preview Markdown in real-time.
Markdown to HTML
Convert Markdown to HTML code.
HTML to Markdown
Convert HTML to Markdown syntax.
Text Diff
Compare two texts and see differences highlighted.
Color Picker & Converter
Pick colors and convert between HEX, RGB, and HSL formats.
CSV to JSON
Convert CSV data to JSON format.
JSON to CSV
Convert JSON data to CSV format.
CSV to XML
Convert CSV data to XML format.
XML to CSV
Convert XML data to CSV format.
YAML to JSON
Convert YAML data to JSON format.
Meta Tag Generator
Generate SEO meta tags.
Sitemap Generator
Create XML sitemaps.
OpenGraph Generator
Generate OpenGraph and Twitter Card meta tags.
Robots.txt Generator
Create robots.txt files for SEO.
Password Strength Checker
Check password security.
HTML Entities Reference
HTML character entity codes.
Responsive Design Tester
Test website on all devices.
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Frequently Asked Questions
Common questions about developer tools
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