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JWT Decoder

Paste a JWT to see its decoded header and payload. Decoded entirely in your browser — the token is never sent anywhere.

File Hash Calculator

Calculate the hash of a file.

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Subnet / CIDR Calculator

Calculate subnet mask, network range, and host count, for IPv4 and IPv6.

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HTTP Status Code Lookup

Look up the meaning of any HTTP status code.

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Regex Tester

Test a regular expression against text with matches highlighted.

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JSON Minifier

Remove whitespace from JSON to reduce its size.

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YAML ⇄ JSON Converter

Convert between YAML and JSON.

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