Free Online Developer Tools
Fast, free tools that run entirely in your browser — no uploads, no waiting, no ads blocking your results.
JSON Formatter & Validator
Format, validate, and beautify JSON instantly.
Base64 Encode/Decode
Encode or decode Base64 strings in your browser.
URL Encode/Decode
Encode or decode URL components instantly.
Regex Tester
Test regular expressions with live match highlighting.
UUID Generator
Generate random UUIDs/GUIDs instantly.
Lorem Ipsum Generator
Generate placeholder text by word or paragraph count.
Hash Generator
Generate MD5, SHA-1, and SHA-256 hashes from text.
Password Generator
Generate strong, random passwords instantly.
QR Code Generator
Generate a QR code from text or a URL.
Word/Character Counter
Count words, characters, and sentences instantly.
Case Converter
Convert text between upper, lower, title, camelCase, and snake_case.
Markdown Previewer
Write Markdown and preview the rendered output live.
Diff Checker
Compare two blocks of text and see the differences.
CSS/JS/HTML Minifier
Minify or beautify CSS, JS, and HTML code.