API Key Builder
Build an API key header or query parameter with a custom name. 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
key abc123 , name X-API-Key
Example Output
X-API-Key: abc123
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 build.
- 4The result appears in the Result area. Click Copy to copy it.
About API Key Builder
The API Key Builder creates an API key header (e.g. X-API-Key: <key>) or query parameter, with a name you can customize. It also reminds you that sending a key in the query string is less safe (logged) — a header is preferred.
In the browser.
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.