The Developer Toolbox You Always Needed
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
10 tools →Encoding
Base64, URL encoding, HTML entities, and character encoding tools
10 tools →Security
Hash generators, password tools, UUID, JWT decoder, and encryption
10 tools →Debug
Regex tester, cron parser, diff checker, HTTP tools, and debugging utilities
10 tools →Code Formatters
Format and beautify HTML, CSS, JavaScript, SQL, Python, and more
10 tools →Converters
HTML to Markdown, CSS to Tailwind, color converter, and unit converters
10 tools →Generators
Lorem ipsum, meta tags, robots.txt, QR codes, and CSS generators
10 tools →API Tools
REST builder, GraphQL playground, cURL converter, and API testing tools
10 tools →Database
SQL builder, MongoDB converter, ERD generator, and schema design tools
10 tools →Frontend
Flexbox, CSS Grid, color palette, animation, and visual CSS generators
10 tools →Bonus Tools
Chmod calculator, Docker compose, Nginx config, and other handy utilities
10 tools →How It Works
Three simple steps to boost your productivity
Choose a Tool
Browse 110+ tools organized by category or search with Cmd+K.
Paste Your Data
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Results appear in real-time. Copy or download with one click.
Why DevToolHere?
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No Signup Required
Use any tool immediately. No account, no email, no friction.
110+ Tools
Everything you need in one place — formatters, converters, generators, and more.
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