Developer

Build URL query strings locally.

Preview how an Open Graph card may appear.

Format, minify, validate and sort JSON.

Compare two JSON objects locally.

Test crawler access against robots.txt rules locally.

Inspect URL parts and query parameters locally.

Generate UUID v4 values locally in your browser.

Validate UUIDs locally in your browser.

Encode or decode Base64.

Generate SHA-256 hashes.

Test regular expressions locally.

Format Markdown tables locally.

Generate copyable SVG/CSS background patterns locally.

Inspect email routing and authentication headers locally.

Validate JSONL records line by line locally.

Decode JWT header and payload locally.

Generate MD5 hashes locally.

Encode or decode URL text locally.

Build UTM-tagged URLs locally.

Format XML locally for readable inspection.

Generate SHA512 hashes locally.