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Format JSON, encode Base64, test regex, generate UUIDs, and 100+ more — all free, instant, and private in your browser.
Most Popular Tools
The developer tools used by thousands every day
JSON Formatter
Data Tools
Format, validate & beautify JSON data
Base64 Encode/Decode
Encoding
Encode or decode Base64 strings instantly
Regex Tester
Debug
Test regular expressions with live matching
UUID Generator
Security
Generate UUIDs v4 with one click
JWT Decoder
Security
Decode and inspect JWT tokens
Password Generator
Security
Create strong, secure passwords
Diff Checker
Debug
Compare two texts and find differences
SQL Formatter
Code Formatters
Format and beautify SQL queries
Color Converter
Converters
Convert between HEX, RGB, HSL formats
Lorem Ipsum Generator
Generators
Generate placeholder text for designs
CSS Gradient Generator
Frontend
Create beautiful CSS gradients visually
HTML Formatter
Code Formatters
Beautify and indent HTML code
Browse by Category
11 categories covering every aspect of development
Data Tools
JSON formatter, CSV converter, XML parser, and data manipulation tools
ExploreEncoding
Base64, URL encoding, HTML entities, and character encoding tools
ExploreSecurity
Hash generators, password tools, UUID, JWT decoder, and encryption
ExploreDebug
Regex tester, cron parser, diff checker, HTTP tools, and debugging utilities
ExploreCode Formatters
Format and beautify HTML, CSS, JavaScript, SQL, Python, and more
ExploreConverters
HTML to Markdown, CSS to Tailwind, color converter, and unit converters
ExploreGenerators
Lorem ipsum, meta tags, robots.txt, QR codes, and CSS generators
ExploreAPI Tools
REST builder, GraphQL playground, cURL converter, and API testing tools
ExploreDatabase
SQL builder, MongoDB converter, ERD generator, and schema design tools
ExploreFrontend
Flexbox, CSS Grid, color palette, animation, and visual CSS generators
ExploreBonus Tools
Chmod calculator, Docker compose, Nginx config, and other handy utilities
ExploreHow It Works
Three simple steps to boost your productivity
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110+ Tools
Everything you need in one place — formatters, converters, generators, and more.
Latest from the Blog
Tips, tutorials, and best practices for developers
Understanding CORS: Common Errors & How to Fix Them
Struggling with CORS errors? This guide breaks down common Cross-Origin Resource Sharing issues and provides clear, actionable steps to fix them, from configuration to best practices.
How to Use Diff Checkers for Efficient Code Comparison
Master code comparison with diff checkers! Learn how these essential developer tools streamline code reviews, merge conflicts, and track changes efficiently. Explore various types and features on DevToolHere.
HTTP Status Codes: The Complete Guide for Developers
Master HTTP status codes with this comprehensive guide for developers. Learn 1xx-5xx categories, debugging tips, and how to improve web applications.
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