A fast three-step workflow
How to use the user agent parser
- 1
Enter the known information
Add only the values or source text the calculation needs. Useful examples and safe defaults are already selected.
- 2
Adjust the assumptions
Use the extra controls to match your real task instead of accepting a hidden one-size-fits-all assumption.
- 3
Review the complete result
Check the main answer, supporting values and method before copying, downloading or acting on the result.
What makes this tool more useful
Inspect a pasted user agent without claiming more precision than the string contains. Matching evidence remains visible in the result.
How the calculation works
Rules look for well-known tokens in priority order and report uncertainty because user-agent strings can be reduced or spoofed.
Triage support logs, analytics exports or compatibility reports while respecting UA limitations.
Private, fast and mobile-ready
The workspace runs with browser JavaScript and does not submit entered values to a Rantey calculation endpoint. Controls use readable labels, large touch targets and responsive result panels for narrow screens.
Frequently asked questions
User Agent Parser FAQ
Is User Agent Parser free?+
Yes. The complete tool is free to use without registration, subscriptions or a watermark.
Does User Agent Parser work on mobile?+
Yes. Inputs, actions and result panels stack for current Android, iPhone, tablet and desktop browsers.
Is my information uploaded?+
No. Values and pasted text are processed in the current browser tab and are not sent to a Rantey application endpoint.
How should I use the result?+
Review the displayed assumptions, method and comparison details. The result is an estimate or transformation based on the values you entered.