Reading User-Agent strings
User-Agent strings are imperfect but still useful for debugging crawlers, support tickets, and analytics anomalies. Parsed fields are best-effort heuristics, not a guaranteed fingerprint.
User-Agent Parser
Paste any User-Agent header to see browser, version, operating system, rendering engine, and whether it looks like a bot.
How it works
- 1
Paste your input into the editor.
- 2
Choose format / mode options if available.
- 3
Copy the transformed output (it usually updates as you edit).
Why use this tool
- Runs entirely in your browser — nothing is uploaded to a server.
- 100% free, no sign-up, no limits.
- Works in any modern browser — no app install, no extension, no account.
How to use User-Agent Parser
Paste into User-Agent Parser, tweak options, and copy the output. Formatting and conversion run in the browser for this tool.
Tips for better results
Keep a backup of original input before bulk transforms. Invalid input should show an error instead of silent corruption.
Privacy and offline-friendly processing
Whenever possible, User-Agent Parser processes your data locally with JavaScript in this page. That means drafts, secrets, and unfinished work stay on your device by default. Prefer this workflow when you do not want to upload sensitive text, tokens, passwords, or files to a third-party service.
Frequently asked questions
Is this as accurate as server-side UA databases?
It covers common browsers, OS tokens, and bot patterns. Rare or spoofed agents may show as Unknown.
Is my User-Agent sent to a server?
No. Parsing runs entirely in your browser.
Is my data uploaded when I use this tool?
For most FlyUtils tools, no. Processing happens in your browser with JavaScript. If a tool ever needs a server, that will be stated clearly on the page.
Is User-Agent Parser free to use?
Yes. User-Agent Parser is free, with no sign-up and no artificial usage caps for normal personal and work use.
Does User-Agent Parser work on mobile?
Yes. The page is mobile-first, so you can paste input, tweak options, and copy results from a phone or tablet.