All tools

Format, validate and minify JSON with instant feedback.

Validate JSON with precise error locations.

Strip whitespace and produce compact JSON output.

Compare two JSON documents side by side.

Generate TypeScript interfaces from a JSON sample.

Encode and decode Base64 with UTF-8 support.

Percent-encode and decode URL components.

Break a URL into its scheme, host, path, query and hash.

Convert a cURL command into JavaScript fetch code.

Inspect JWT headers, payloads and signature status.

SHA-1, SHA-256, SHA-384, SHA-512 hashes computed in-browser.

Convert HEX ↔ RGB ↔ HSL ↔ OKLCH.

Test regular expressions with live match highlighting.

Convert between Unix timestamps and human-readable dates.

Generate v4/v7 UUIDs — one or many at a time.