What this tool does
HMAC Generator: free online Developer tool with clear controls, private processing where supported and verifiable results.
Input and output
Generate HMAC: text you paste into the page → the HMAC Generator result, which you can copy and download when the tool produces a file
How to use HMAC Generator
- Provide text you paste into the page.
- Fill in Message.
- Fill in Secret key.
- Press "Generate HMAC" and review the result in the panel on the right.
- Download or copy the HMAC Generator result, which you can copy and download when the tool produces a file.
Settings
Privacy and limitations
- HMAC Generator runs entirely in your browser: the input is not uploaded, so it never leaves your device.
- Results depend on valid input and on the limits declared by each field above; this page does not promise a fixed processing time or file size.
Frequently asked questions
- Is my data uploaded when I use HMAC Generator?
- No. This tool runs entirely in your browser, so the input stays on your device and is not uploaded.
- Which input does it accept?
- It works with text you paste into the page.
- What do I get back?
- After you press "Generate HMAC" the result panel shows the HMAC Generator result, which you can copy and download when the tool produces a file, which you can copy or download.
- Can I change the settings?
- Yes. The page exposes Algorithm (MD5, SHA-1, SHA-256, SHA-384, SHA-512); Message input encoding (UTF-8 text, Hexadecimal, Base64); Secret encoding (UTF-8 text, Hexadecimal, Base64); Output (Hexadecimal, Base64).
