Inspect User-Agent browser, OS and device claims with optional supplied Client Hints, explicit unknown values, local parsing and spoofing caveats.
A quick decision brief for this specific tool
User-Agent value
User-Agent analysis JSON
A dedicated interactive panel for this data format or operation
Choose your path
Inspect unverified browser/OS/platform claims with explicit unknowns and compare optional manually supplied Client Hints without authenticating a device.
Distinguish mobile OS and browser tokens correctly.
Compare Android, iPhone, iPad, Edge and Safari samples, then inspect reported version versus engine.
Mobile systems are not mistaken for generic desktop tokens; reported values remain claims.
Compare two untrusted identity sources.
Provide supported and unsupported Client Hints brands; inspect raw hints, UA-only and combined inference.
No blanket hint-precedence claim; original hints and uncertainty stay visible.
Inspect a single UA without automatic device collection.
Explicitly load this browser’s UA or paste a crawler claim, clear/retry and copy on a narrow screen.
No high-entropy collection or automatic persistence; bot token is not treated as authentication.
Outputs and checklists are planning aids. Review the linked current authorities and the records, terms, instructions, and requirements that apply to your exact situation before a consequential decision.
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Bowser 2.14.1 identifies browser, OS, platform and engine patterns. Android and iOS are distinguished from generic Linux/macOS tokens, and Safari Version is separate from its engine build. Unknown fields remain explicit.
Optional Client Hints JSON is manually supplied and retained separately. Bowser uses selected supported hints for inference; not every brand or platform field overrides a UA token. No high-entropy hints are collected automatically.
UA strings can be spoofed, reduced or frozen. A crawler token is only a claim; Windows NT 10.0 and desktop-mode iPadOS are ambiguous. Use feature detection and independent security controls. UA/hints each allow 8,192 characters; worker timeout is 10 seconds.
Updated: August 2026
Compare Android, iPhone and iPad tokens without misclassifying them as desktop Linux or macOS.
Supply selected Client Hints and compare the raw hints, UA-only inference and combined parser result.
Inspect a Googlebot-like token without treating it as bot verification, authorization or proof of a real browser.
Compare reported browser and operating-system tokens without mistaking a string for a verified device. Optional Client Hints remain visible beside UA-only inference.
