Developer Tools

Format, beautify, and validate JSON data instantly.

Encode or decode Base64 strings and files instantly.

Percent-encode or decode any URL or query string.

Minify CSS to reduce file size and speed up your website.

Strip whitespace and comments from HTML for faster pages.

Generate random UUIDs (v4) in bulk — one click, no login.

Convert Markdown to clean, semantic HTML in real time.

Test and debug regular expressions with live match highlighting.

Pick colors and convert between HEX, RGB, HSL, and more.

Generate SHA-1, SHA-256, and SHA-512 hashes from any text — no upload required.

Convert HTML markup to clean Markdown syntax — reverse of Markdown-to-HTML.

Check WCAG accessibility contrast ratios between foreground and background colors.

Convert any number into its written English word form — e.g. 1234 → "one thousand two hundred thirty-four."