Identify client details from user agent strings. This tool detects browser names, versions, operating systems, and device categories from web requests, helping developers and analysts understand user environments.
Privacy Protected
User Agent Parser - Browser & OS Detector - FusioFiles
Decode any User Agent string to identify browser, operating system, and device type instantly. Fast, free, and 100% private. All processing happens locally.
Share Tool
Select files or drag & drop here
Processed 100% locally in your browser. Your files never touch an external server.
Choose File to Begin
100% Client-Side Privacy•No File Size Limits•Free Forever
How to use User Agent Parser
FusioFiles 100% Client-Side Privacy Guarantee
Your files and data never leave your browser — processed directly on your device.
Zero Server UploadsExecution occurs entirely in browser memory via WebAssembly and HTML5 Canvas.
HIPAA & GDPR ReadySafe for confidential tax forms, medical records, financial sheets, and legal contracts.
Zero Cloud LatencyInstant results with no upload delays, server queues, or third-party tracking.
Automatic RAM PurgeBuffers and caches are automatically wiped clean the instant you close the tab.
1
Input UA
Paste the raw User Agent string you want to analyze.
2
Identify Software
The tool detects browser engine, version, and vendor.
3
Trace OS
See the Operating System and device category instantly.
Key Features
Browser & OS detection
Identifies software versions.
Device category
Detects mobile vs desktop.
Paste analysis
Analyze any UA string.
Current browser
Auto-detects your current UA.
Frequently Asked Questions
A User Agent string identifies your browser and operating system to the websites you visit.
Related Tools
View allLast updated on