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DEVELOPER BENCH
Use a supplied text key and message to generate an HMAC-SHA-256 or HMAC-SHA-512 hexadecimal digest in the browser.
WHAT THIS DOES
Runs entirely in your browser.
/tools/hmac-generatorhmacv4.0.0LOCAL · 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 and returns a hexadecimal digest for the supplied message.
Boundary: Do not paste a material production secret. This is a local test utility, not a key vault, signature-verification service, or production credential workflow.
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
Do not paste a material production secret. This is a local test utility, not a key vault, signature-verification service, or production credential workflow.
No. This published tool runs locally in your browser. UtilityForge does not send the values entered in this workbench to a server.
No. This workbench runs in the page: Test key, Message, HMAC algorithm 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.
RELATED TOOLS
LOCAL — Runs entirely in your browser.
COMMON USE CASES / SOURCE NOTE
Last reviewed:
Source information: Browser Web Crypto HMAC signing over supplied text. UtilityForge does not transmit, store, or verify the test key or message.