User Agent Parser
Parse browser user agents
User Agent Parser: Parse browser user agents. A free, browser-based tool from DevToolbox that runs entirely on your own device: no upload, no account, no tracking.
About the User Agent Parser
Break a user agent string into browser, engine, operating system and device type, including your own, which is loaded by default.
This is a reference and calculation tool, not a probe: the numbers and lookups are computed from tables and arithmetic in your browser rather than by contacting any host. That keeps it usable behind a firewall and means nothing about your network is disclosed.
What you can do with it
- UA parser
- Browser detection
- User agent string
- Device detection
- OS detection
How to use it
- Enter the address, code or identifier you want to look up.
- The breakdown is calculated locally from reference tables and arithmetic.
- Every derived field is shown together so you can check your working.
- Copy the result or share the link.
Questions
- Why do user agent strings mention browsers that are not the browser?
- History. Nearly every string still claims to be Mozilla, and Chromium browsers claim Safari and Chrome as well, because sites once sniffed for them. Parsing them is guesswork by convention, which is why client hints exist.
- Is my data uploaded anywhere?
- No. The tool is JavaScript that runs in the tab you already have open, and DevToolbox has no backend to send anything to. You can open the network tab and watch: after the page and its script load, nothing is sent while you work.
Related tools
The User Agent Parser sits in Network & API, one of the 90 tools on DevToolbox.