WEB UTILITIES
Free User Agent Parser online
Parse browser user agent strings.
Use User Agent Parser to parse browser user agent strings in seconds, straight from your browser. Paste your file into User Agent Parser, tweak the options, and take the result with one click. User Agent Parser processes everything in your own browser, so your data never leaves your device.
- Free to use
- No signup
- Private and local
- Unlimited use
Why use User Agent Parser
- parse browser user agent strings without installing software
- Your file is processed on your device by User Agent Parser, never uploaded
- User Agent Parser needs no account, email address or payment details
- User Agent Parser shows live output that updates as you type
- User Agent Parser is keyboard accessible and screen-reader friendly
- User Agent Parser is free forever, with no watermark on the result
User Agent Parser runs entirely inside your browser. Your file is never uploaded, stored or shared, and nothing is retained once you close the tab.
How to use User Agent Parser
- Enter your file Paste or type your file into the input panel above.
- Adjust the options Set the options that control how User Agent Parser handles your input.
- Apply the change User Agent Parser works instantly on your device, with no queue and no upload wait.
- Copy or download Copy the output to your clipboard or download it as a file, free and unlimited.
Benefits
Private by design
Your file stays on your device while User Agent Parser works. User Agent Parser never sends it to a server, so confidential work stays confidential.
Instant results
User Agent Parser finishes most jobs in under a second because the work happens on your own hardware.
No signup, no limits
Use User Agent Parser as many times as you want. User Agent Parser asks for no account, adds no watermark and keeps no paid tier gating the output.
Works on any device
User Agent Parser runs in any modern browser on desktop, tablet and phone, with a keyboard-accessible interface throughout.
Who it is for
For students
Students use User Agent Parser to hand in coursework without installing software: parse browser user agent strings on a shared or locked-down machine.
For freelancers
User Agent Parser helps freelancers send client deliverables quickly, since your file never leaves the laptop it was created on.
For HR and admin teams
User Agent Parser helps HR and admin teams process paperwork quickly, since your file never leaves the laptop it was created on.
How it works
User Agent Parser loads your file into memory, applies the change you requested to the underlying data rather than to a screenshot of it, and writes a fresh copy for download. Your original stays untouched on disk, and every step of User Agent Parser happens inside your browser sandbox.
Frequently asked questions
Is User Agent Parser free to use?
Yes. User Agent Parser is completely free with no account, no trial and no usage cap. Every feature on this page is available on the first visit.
Does User Agent Parser upload your file to a server?
No. User Agent Parser processes your file inside your browser, so it never reaches a DocTools server. That also means the tool keeps working if your connection drops mid-task.
Is there a limit on how much input I can use?
User Agent Parser handles inputs into the megabytes without trouble; the only real limit is how much your browser tab can hold in memory.
Do I need to install anything to use User Agent Parser?
No installation is needed. User Agent Parser runs in Chrome, Edge, Firefox and Safari, on desktop and on mobile, with no extension or plugin.
Can I use User Agent Parser on a phone or tablet?
Yes. The User Agent Parser interface adapts to small screens and supports touch input, though very large jobs are faster on a desktop browser.
What happens to your file when I close the tab?
It is discarded. User Agent Parser keeps everything in temporary browser memory, so closing the tab removes every trace of the session.
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Last updated: 2026-09-07