Free Proxy Tools
The same two checks we run before a line reaches a customer, open to everyone. No sign-up, nothing stored.
What IP am I on? See each line's carrier, ASN, city, time-zone match and WebRTC leak at a glance.
Free toolProxy checkerPaste a single proxy or your whole fleet (HTTP, HTTPS, SOCKS4, SOCKS5) for each line's exit IP, location, ISP and latency, then export the working ones.
Free downloadProxy Tester appDesktop app for Windows, macOS and Linux.
Go deeper with IPFighter
For teams testing browser fingerprinting, bot detection, DNS and WebRTC leaks, IPFighter's free suite is our usual referral, and it sits well beside a Mobile Proxies USA line:
IP score & lookup ↗ Browser fingerprint ↗ Bot detection ↗ DNS leak test ↗ WebRTC leak test ↗ IPFighter proxy checker ↗
Recommended antidetect browsers
Which antidetect browser works best with several lines? Undetectable.io first: one profile per line, each profile's time zone and language set to that line's city, the HTTP or SOCKS5 details pasted in. GoLogin is our second pick, and the one for teams on Linux.
Undetectable.io
Start on a free plan; Windows and macOS; profiles stored locally or in the cloud. Give each profile its own Mobile Proxies USA line.
Get Undetectable.io ↗GoLogin
A free plan covers 3 profiles; Windows, macOS and Linux, with phone apps too. Paste a Mobile Proxies USA line as host:port:user:pass.
Get GoLogin ↗Partner links. Our lines plug into any antidetect browser that accepts an HTTP or SOCKS5 proxy, and these two are our recommendations.
Ready to start?
Real carrier SIMs on every line, eight live US metros, unlimited rotation. Per line: $2 for two hours, $5 for a day.