- 1Choose file
- 2Adjust
- 3Download
User Agent Parser & Profiler online, free
Parse and decode browser, device, operating system, and bot user-agents.
- Runs in your browser — no upload
- Free, no sign-up, no watermark
- TXT
How to use User Agent Parser & Profiler · User Agent Parser & Profiler — frequently asked questions
How to use User Agent Parser & Profiler
- 1
Add your TXT file
Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.
- 2
Fine-tune the settings
The defaults already suit most files; change them only if you need to.
- 3
Run User Agent Parser & Profiler
Press the start button. Processing happens on your device, usually in seconds.
- 4
Download the result
Save the finished file, or continue with another tool without downloading in between.
What User Agent Parser & Profiler can do
- Private by design — files are processed in your browser and never uploaded
- Free with no sign-up, no watermark and no daily limit
User Agent Parser & Profiler — frequently asked questions
What components are extracted from a User-Agent string?
The parser extracts browser name and version, rendering engine (Blink, Gecko, WebKit), operating system family and version, device brand and architecture, and bot/crawler identifiers.
Can I inspect my own browser's current User-Agent?
Yes. If you leave the input field empty, the tool automatically inspects and analyzes your current browser environment.
How does the tool differentiate human browsers from search bots?
The parser analyzes signature tokens indicating automated crawlers such as Googlebot, Bingbot, YandexBot, Twitterbot, and headless drivers.
Does this tool transmit User-Agent strings to any server?
No. The regex parsing engine runs entirely in your local browser sandbox with zero network uploads.
Why are modern User-Agent strings so complicated?
Historically, browsers appended tokens from earlier competitors (like Mozilla/5.0) to maintain backwards compatibility with legacy website layout scripts.
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