Developer Tools — 100 Free Dev Tools Online
Format, encode, convert, debug, hash, generate CSS, test APIs, validate configs and more — all the developer utilities you need, free with no sign-up.
100Dev Tools
11Subcategories
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Code Formatting & Beautifiers
Format, validate and minify JSON, XML, HTML, CSS, JS, SQL, YAML, Markdown and CSV
Encoding / Decoding Tools
Base64, URL, HTML, Unicode, ASCII, JWT, binary, hex encode and decode
Data Conversion Tools
Convert JSON, CSV, XML, YAML, Markdown, HTML and Excel between each other
Developer Debugging Tools
Regex tester, HTTP headers, REST API tester, cURL generator, JSON diff and code diff
Hashing & Security Tools
MD5, SHA1, SHA256, SHA512, HMAC, Bcrypt, password checker and entropy calculator
Web Developer Tools
Meta tags, robots.txt, sitemaps, Open Graph, Twitter Cards, schema markup and DOM viewer
CSS & UI Development Tools
Grid, flexbox, shadow, border-radius, clip-path, gradient, animation and glassmorphism generators
JavaScript Developer Tools
Obfuscate, deobfuscate, visualize event loop, promises, async/await and data processing
Network & Internet Tools
IP validator, IPv4/IPv6 converter, CIDR and subnet calculator
DevOps / Infrastructure Tools
Cron expression generator and parser, Dockerfile linter, Kubernetes YAML validator, .env generator
Code Utility Tools
UUID generator, slug generator, lorem ipsum, case converter and code snippet formatter
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