ITOpsFree IT Tools
No sign-up, nothing leaves your browser. Part of IT Operations Intelligence Platform — the full toolbox has more, once you're in.
JWT Decoder
Inspect a JSON Web Token's header and claims. Doesn't verify the signature.
IP Calculator
Subnet mask, network/broadcast address and host range from a CIDR block.
Regex Tester
Test a pattern against sample text and see every match, group and index.
UUID Generator
Generate RFC 4122 v4 UUIDs, one at a time or in bulk.
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