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SECURITY BENCH
Use a supplied text key and message to generate an HMAC-SHA1 hexadecimal digest in the browser.
WHAT THIS DOES
Runs entirely in your browser.
/tools/hmac-sha1-generatorhmac-sha1v4.0.0LOCAL · LOCAL RUNIMPLEMENTED — This workbench is functional in the current release.Presets for this workbench
No preset yet. A preset stores the values in this form — never the result — and only for workbenches that run entirely in your browser.
Collections
Saved on this device only. Turn on sync to carry them to another device.
BATCH / ONE VALUE PER LINE
Up to 200 lines, one at a time, in this browser. Each line takes the place of key and everything else stays as you set it. Nothing is uploaded, and the row limit is not exceeded silently.
METHOD / LOCAL RUN
Browser Web Crypto imports the supplied UTF-8 key for HMAC signing with SHA-1 and returns a hexadecimal digest.
Boundary: Do not paste a material production secret. SHA-1 is included for legacy test fixtures; choose HMAC-SHA-256 or HMAC-SHA-512 for new work.
The calculation or transformation runs in your browser using the values entered above. No input is sent to UtilityForge for this tool.
EXAMPLES / LOCAL RUN FIXTURES
FAQ
No. UtilityForge is a local workbench. Use a real password manager and authentication system for credentials.
No. The HMAC-SHA1 generator runs locally; nothing is sent to UtilityForge.
The workbench states the exact method behind every result — the formula or procedure this page runs — so you can verify the computation instead of trusting a black box.
No. This workbench runs in the page: Test key, Message are read by the code your browser already downloaded, and UtilityForge receives neither the values nor the result.
Yes, and it is enforced rather than advertised: Test key (100,000 characters) and Message (100,000 characters). The limit is a browser input limit on a tool that runs on this device, so nothing is truncated after being sent anywhere.
Do not paste a material production secret. SHA-1 is included for legacy test fixtures; choose HMAC-SHA-256 or HMAC-SHA-512 for new work.
RELATED TOOLS
LOCAL — Runs entirely in your browser.
COMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Browser Web Crypto HMAC signing with SHA-1. UtilityForge does not transmit, store, or verify the test key or message.