Free User Agent Parser Online
Parse any User-Agent string into browser, engine, OS, device type, vendor and model, and detect bots and crawlers. No UA given? It parses your own.
Result
Press “Run” to see the result.
The User Agent API turns a raw User-Agent header into structured data: browser name, version and major version, rendering engine, operating system and version, device type, vendor and model, and CPU architecture when present. Simple booleans – is_mobile, is_tablet, is_desktop and is_bot – make it easy to branch in your code.
Pass the string in ua (or user_agent) via query or JSON. If you omit it, the API parses the User-Agent of the request itself, which is handy for a quick “what is my browser” check from a browser or a script.
Bot detection matches common crawlers, link-preview fetchers and HTTP clients (Googlebot, Bingbot, facebookexternalhit, Slack, Discord, Telegram and WhatsApp previews, curl, wget, python-requests, axios, headless browsers, Lighthouse, uptime monitors). Parsing is based on the open-source ua-parser-js library.
Use this in your code
curl "https://apibox.io.vn/v1/user-agent?ua=Mozilla%2F5.0%20(iPhone%3B%20CPU%20iPhone%20OS%2017_5%20like%20Mac%20OS%20X)%20AppleWebKit%2F605.1.15%20(KHTML%2C%20like%20Gecko)%20Version%2F17.5%20Mobile%2F15E148%20Safari%2F604.1" \
-H "Authorization: Bearer YOUR_API_KEY"const res = await fetch('https://apibox.io.vn/v1/user-agent?ua=Mozilla%2F5.0%20(iPhone%3B%20CPU%20iPhone%20OS%2017_5%20like%20Mac%20OS%20X)%20AppleWebKit%2F605.1.15%20(KHTML%2C%20like%20Gecko)%20Version%2F17.5%20Mobile%2F15E148%20Safari%2F604.1', {
method: 'GET',
headers: {
Authorization: 'Bearer YOUR_API_KEY',
},
});
const data = await res.json();
console.log(data);import requests
res = requests.get(
"https://apibox.io.vn/v1/user-agent?ua=Mozilla%2F5.0%20(iPhone%3B%20CPU%20iPhone%20OS%2017_5%20like%20Mac%20OS%20X)%20AppleWebKit%2F605.1.15%20(KHTML%2C%20like%20Gecko)%20Version%2F17.5%20Mobile%2F15E148%20Safari%2F604.1",
headers={"Authorization": "Bearer YOUR_API_KEY"},
timeout=30,
)
print(res.json())<?php
$ch = curl_init('https://apibox.io.vn/v1/user-agent?ua=Mozilla%2F5.0%20(iPhone%3B%20CPU%20iPhone%20OS%2017_5%20like%20Mac%20OS%20X)%20AppleWebKit%2F605.1.15%20(KHTML%2C%20like%20Gecko)%20Version%2F17.5%20Mobile%2F15E148%20Safari%2F604.1');
curl_setopt_array($ch, [
CURLOPT_RETURNTRANSFER => true,
CURLOPT_HTTPHEADER => ['Authorization: Bearer YOUR_API_KEY'],
]);
$response = curl_exec($ch);
print_r(json_decode($response, true));API documentation → Get a free API key
FAQ
How do I detect if a visitor is a bot?
Send their User-Agent in ua and check is_bot. Detection is pattern based (crawlers, preview fetchers, HTTP libraries, headless browsers); a bot that fakes a normal browser UA will not be detected.
Can I parse the User-Agent of my own request?
Yes, call /v1/user-agent without parameters and the API parses the User-Agent header it received.
Why is device type "desktop" when vendor and model are null?
Desktop browsers do not announce a device model, so the API falls back to desktop when the UA is not a bot and does not contain "Mobile".