Best free User-Agent parser tools
AdminKit's free User agent tool reads your browser's own User-Agent string entirely client-side and breaks it into browser, engine, OS and device type, with no account and no server round trip; WhatIsMyBrowser.com, UserAgentString.com, User-Agents.net and WhatMyUserAgent.com each parse User-Agent strings too, but with different mixes of reference databases, developer APIs and paid tiers.
AdminKit is built by Netbase JSC. AdminKit is listed below; WhatIsMyBrowser.com, UserAgentString.com, User-Agents.net and WhatMyUserAgent.com are independent and not affiliated with AdminKit.
What each tool’s own page confirms
WhatIsMyBrowser.com, read 2026-11-04, automatically reads the visiting browser’s own request on its detect page and decodes it into browser, OS and device details, alongside system info like IP address, location and ISP, with no account required. Its separate User Agent Parsing API offers a free Basic tier (5,000 monthly detections) and paid tiers from $25 to $99 AUD/month up to 1,000,000 detections — the fuller breakdown, including its explore.whatismybrowser.com research platform, is covered in AdminKit vs WhatIsMyBrowser.com.
UserAgentString.com, read 2026-11-04, is a free paste-and-analyze tool: its own homepage instructs you to “copy/paste any user agent string in this field and click Analyze,” rather than auto-detecting your current browser, and it links a directory of known (and unrecognized) user-agent strings for reference. No account, API or pricing is mentioned anywhere on its page.
User-Agents.net, read 2026-11-04, is primarily a user-agent database — its own homepage describes lists organized by browser, bot, device and rendering-engine category — with a dedicated My User Agent page that does auto-detect the visiting browser, plus a separate parser page for pasted strings. No sign-up or account link appears anywhere on the site, and its own pages name no API or pricing.
WhatMyUserAgent.com, read 2026-11-04, shows a visiting browser’s name, version, engine, OS, device, and IP address with geolocation directly on its homepage, with optional account sign-up only required for its API tiers. Its own pricing page lists a free API tier (1,000 requests/day) and three paid tiers from $9.99 to $99.99/month up to unlimited daily requests.
The honest angle
These four tools and AdminKit’s parser aren’t solving the identical problem. If you need to paste an arbitrary User-Agent string you found somewhere else and look it up against a known-strings reference, UserAgentString.com and User-Agents.net both do that and AdminKit doesn’t. If you need a paid API to classify traffic programmatically at volume, WhatIsMyBrowser.com and WhatMyUserAgent.com both sell one with free tiers to start from, and AdminKit has no API product today. AdminKit’s User agent tool instead does one thing for a single visitor: read your own browser’s current User-Agent and parse it entirely client-side, with no account, no API and nothing sent to AdminKit’s servers — see what a User-Agent string reveals for what each parsed field actually means, and AdminKit’s own IP tool for the separate check that covers your public IP and location instead.
Trademarks belong to their respective owners; AdminKit is not affiliated with WhatIsMyBrowser.com, UserAgentString.com, User-Agents.net or WhatMyUserAgent.com.
| Feature | AdminKit | WhatIsMyBrowser.com | UserAgentString.com | User-Agents.net | WhatMyUserAgent.com |
|---|---|---|---|---|---|
| Free, no account required for a basic parse | ✓ | ✓ | ✓ | ✓ | ✓ |
| Automatically detects and shows your own current browser's User-Agent (no copy/paste needed) | ✓ | ✓ | ✗ | ✓ | — |
| Dedicated database/reference list of known user-agent strings to browse | ✗ | — | ✓ | ✓ | — |
| Paid developer API for programmatic UA parsing | ✗ | ✓ | — | — | ✓ |
| Parsing/display runs client-side, nothing sent to the tool's own server | ✓ | ✗ | — | — | — |
| Also shows your public IP address and approximate location alongside the UA breakdown | ✗ | ✓ | — | — | ✓ |
AdminKit vs WhatIsMyBrowser.com
Free, no account required for a basic parse
Automatically detects and shows your own current browser's User-Agent (no copy/paste needed)
Dedicated database/reference list of known user-agent strings to browse
Paid developer API for programmatic UA parsing
Parsing/display runs client-side, nothing sent to the tool's own server
Also shows your public IP address and approximate location alongside the UA breakdown
AdminKit vs UserAgentString.com
Free, no account required for a basic parse
Automatically detects and shows your own current browser's User-Agent (no copy/paste needed)
Dedicated database/reference list of known user-agent strings to browse
Paid developer API for programmatic UA parsing
Parsing/display runs client-side, nothing sent to the tool's own server
Also shows your public IP address and approximate location alongside the UA breakdown
AdminKit vs User-Agents.net
Free, no account required for a basic parse
Automatically detects and shows your own current browser's User-Agent (no copy/paste needed)
Dedicated database/reference list of known user-agent strings to browse
Paid developer API for programmatic UA parsing
Parsing/display runs client-side, nothing sent to the tool's own server
Also shows your public IP address and approximate location alongside the UA breakdown
AdminKit vs WhatMyUserAgent.com
Free, no account required for a basic parse
Automatically detects and shows your own current browser's User-Agent (no copy/paste needed)
Dedicated database/reference list of known user-agent strings to browse
Paid developer API for programmatic UA parsing
Parsing/display runs client-side, nothing sent to the tool's own server
Also shows your public IP address and approximate location alongside the UA breakdown
Last checked
Sources: WhatIsMyBrowser.com — homepage, WhatIsMyBrowser.com — What is my User Agent?, WhatIsMyBrowser.com Developers — API pricing, UserAgentString.com — homepage, User-Agents.net — homepage, User-Agents.net — My User Agent, WhatMyUserAgent.com — homepage, WhatMyUserAgent.com — pricing
Frequently asked questions
Do any of these tools automatically show your own browser's current User-Agent, or do you have to paste one in?
It varies. WhatIsMyBrowser.com's detect page and User-Agents.net's dedicated 'My User Agent' page both read the visiting browser's own request automatically, the same way AdminKit's User agent tool reads navigator.userAgent automatically. UserAgentString.com's own homepage, read 2026-11-04, instead asks you to 'copy/paste any user agent string in this field and click Analyze' — it's built as a lookup for an arbitrary string, not an auto-detect of your own.
Which of these tools offer a paid developer API?
WhatIsMyBrowser.com and WhatMyUserAgent.com both do, per their own pricing pages read 2026-11-04. WhatIsMyBrowser.com's User Agent Parsing API has a free Basic tier (5,000 monthly detections) then $25-$99 AUD/month paid tiers up to 1,000,000 detections. WhatMyUserAgent.com's API has a free tier (1,000 requests/day) then $9.99-$99.99/month paid tiers up to unlimited daily requests. UserAgentString.com and User-Agents.net's own pages name no API or pricing, so those two are marked unverified here rather than assumed to have none.
Does AdminKit's User agent tool have a reference database of known user-agent strings like UserAgentString.com or User-Agents.net?
No. AdminKit's tool only parses the User-Agent your own browser sends; it has no browsable list of known strings. UserAgentString.com's own homepage links a directory of (including unrecognized) user-agent strings, and User-Agents.net's own homepage describes a database organized by browser, bot, device and rendering-engine category — both are reference-lookup sites first, which is a different job than a one-off personal check.
Is this page ranking these four tools from best to worst?
No. A one-off client-side check, a paste-and-analyze reference lookup, a browsable user-agent database and a paid detection API solve different problems, so a single best-to-worst order would misrepresent what each is for. The table below states only what each tool's own page confirms, so you can match the tool to what you actually need.
Does this page use WhatIsMyBrowser.com's, UserAgentString.com's, User-Agents.net's or WhatMyUserAgent.com's logo or brand assets?
No. All four names are used only to identify and compare publicly available services (nominative use). AdminKit is not affiliated with or endorsed by WhatIsMyBrowser.com, UserAgentString.com, User-Agents.net or WhatMyUserAgent.com.
AdminKit already has a page comparing it to WhatIsMyBrowser.com directly — why a second comparison?
The two pages answer different questions. [AdminKit vs WhatIsMyBrowser.com](/compare/vs-whatismybrowser/) is a one-on-one deep dive into that single competitor's API pricing and exploration platform. This page is the wider category roundup: how AdminKit's parser stacks up against four of the more commonly used free User-Agent parsing tools side by side. Nothing here repeats the head-to-head page's detail — see that page for WhatIsMyBrowser.com's full breakdown.
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