User Agent Parser
User Agent Parser
Parse user-agent strings online to identify browser, OS, device class, and rendering engine.
Input
Parsed Output
About The User Agent Parser
The User Agent Parser reads a browser user-agent string and extracts a quick browser, operating system, device class, rendering engine, mobile-token flag, and string length. It is useful for support tickets, QA notes, compatibility checks, and quick environment triage.
The parser uses lightweight browser-side pattern matching. It is meant for quick inspection, not for security decisions or high-accuracy device analytics where a maintained user-agent database would be more appropriate.
How to Parse a User Agent Online
- Paste one complete user-agent string into the input box.
- Click Parse.
- Review the detected browser, OS, device class, engine, mobile token, and length.
- Use Load sample to parse your current browser user agent.
- Copy the output when you need to include environment details in a bug report or support note.
Reading the Output
Browser and OS: The tool reports common families such as Chrome, Firefox, Safari, Edge, Windows, macOS, Android, iOS, and Linux when their tokens are present.
Device: The result is a broad class: desktop, mobile, tablet, or bot/crawler based on recognizable tokens.
Engine: The result is inferred from common rendering-engine tokens such as Blink, WebKit, Gecko, or Trident.
Common Use Cases
- Summarizing browser details for a frontend bug report.
- Checking whether a reported user agent looks mobile, tablet, desktop, or crawler-like.
- Comparing test-device user agents during QA.
- Quickly documenting the browser environment behind a support issue.
Quick FAQ
Can user-agent strings be misleading?
Yes. Browsers, bots, privacy tools, and apps can spoof or reduce user-agent details. Treat results as hints.
Does this parse multiple user agents at once?
Use the controls shown on the page. If only one input is provided, batch parsing needs a separate workflow.
Does it send the string to a server?
No. Parsing is designed to run in the browser.
Why is the OS or browser wrong?
Some user agents are frozen, abbreviated, compatibility-focused, or intentionally misleading.
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