User Agent Library
Browse and copy common UA strings.
🖥User Agent Library
All processing happens locallyWhat this tool does
User Agent Library is a UserAgent string reference library, it is static text with no network access, so your real UA is not collected.
Never test an API with one UA only. Cover desktop Chrome, mobile Safari and the WeChat in-app browser, which is a frequent source of compatibility issues.
How to use it
- Paste or type your content into the input field at the top, or press the sample button to load demo data.
- Adjust the options below the input, such as output format, separators, letter case or precision.
- Press the main button to run the conversion. Results appear instantly in the output panel without a page reload.
- When the result looks right, use the copy button in the corner, or download it as a local file.
Tips and notes
Clean up stray spaces and line breaks before pasting for more accurate results.
FAQ
Version numbers change over time; the library holds common versions at time of writing, adequate for testing.
The dedicated UserAgent viewer tool does that; this page is a static reference.
Servers often return different content by UA, so testing needs to confirm consistency across clients.
Yes. The tool is completely free with no usage limits, and you never need an account or a sign-in.
No. All processing runs locally in your browser, so the input never reaches a server and is never logged or stored.
Yes. The layout is mobile-first, so inputs and buttons stay comfortable on phones and tablets in both orientations.
Yes. A copy button in the output panel puts the result on your clipboard, and you can also download it as a text file.