12 tools — free, fast, browser-only

Every tool developers reach for, in one place.

Format JSON, decode JWTs, generate UUIDs, convert colors, test regex — no signup, no tracking, nothing sent to a server.

Start with JSON FormatterBrowse All Tools
No data sent to servers
12+ tools
Works offline
No signup required

Popular Tools

JSON Formatter

Format, validate and minify JSON with syntax highlighting.

JSON ↔ YAML

Convert between JSON and YAML instantly — two-way.

Base64 Encode / Decode

Encode text or files to Base64 and decode Base64 strings.

URL Encode / Decode

Encode and decode URL components and full URLs.

UUID Generator

Generate UUID v1 through v7, ULID — bulk generate up to 1,000 at once.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512 hashes from text.

All Tools by Category