ETag Generator
Generate an ETag header from content for conditional caching. Everything is processed on your device, nothing is sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
Hello world
Example Output
ETag: "1c8a4f2b-b"
How to Use
- 1Fill the input fields with your data (or paste the text to process).
- 2If there are options, adjust them to your needs.
- 3Click Run (or press Ctrl+Enter) to generate.
- 4The result appears in the Result area. Click Copy to copy it.
About ETag Generator
The ETag Generator creates an ETag value from response content using a fast hash (FNV-1a) plus the content length. An ETag is a resource version identifier — the client sends If-None-Match with the ETag, and the server replies 304 Not Modified if unchanged, saving bandwidth.
In the browser, no eval.
FAQ
Are any network requests sent?
No. This tool only transforms/analyzes text in your browser — no actual HTTP request is sent, and your data never leaves your device. (Tools that truly call an external server are intentionally not provided due to browser CORS limits.)
Is my data safe?
Yes. All processing happens entirely locally in your browser. Nothing is uploaded, logged, or stored on our servers.