Developer Tools - HeavyToolz

{ } JSON Formatter & Validator Format, validate, and minify JSON with clear, precise error messages.

⇄ Base64 Encoder / Decoder Encode text to Base64 or decode Base64 back to text, with full Unicode support.

% URL Encoder / Decoder Encode text for safe use in URLs, or decode percent-encoded URLs back to plain text.

🪪 JWT Decoder Decode a JSON Web Token's header and payload to inspect its claims — no signature verification.

🎯 Regex Tester Test regular expressions against sample text with live match highlighting.

# Hash Generator Generate SHA-1, SHA-256, SHA-384, and SHA-512 hashes from any text.

🆔 UUID Generator Generate one or many random UUID v4 identifiers instantly.

🎨 Color Converter Convert colors between HEX, RGB, and HSL with a live preview.

01 Number Base Converter Convert numbers between decimal, binary, octal, and hexadecimal instantly.

📝 Markdown Previewer Write Markdown on the left and see the rendered HTML preview live on the right.