Free browser and proxy tools
Small, honest tools for the things an anti-detect browser is about: what a website can read about you, whether your IP and your clock agree, and whether a proxy is alive. Each one answers on the page. Most run entirely in your browser; the few that need the network say so, keep nothing, and log no request bodies.
Browser fingerprint test
Every value a page can read about your browser and computer, grouped and checked for the contradictions detectors look for.
browser fingerprint test · runs in your browserWebRTC leak test
Gathers the IP addresses WebRTC can expose and compares them with the address your HTTP traffic comes from.
webrtc leak test · runs partly on our serverProxy checker
Paste HTTP, HTTPS or SOCKS5 proxies and check reachability, the exit IP, its country and the network owner.
proxy checker online · runs partly on our serverWhat is my IP
Your public IP, its ASN and owner, country and city, and whether its timezone matches your browser clock.
what is my ip · runs partly on our serverUser-agent parser
Parse any user-agent string into browser, version, engine, OS and device — and flag the parts that contradict.
user agent parser · runs in your browserTimezone & IP checker
Compares your browser timezone and locale with your IP’s location — the exact signal consistency detectors read.
ip timezone mismatch checker · runs partly on our serverCookie converter
Convert cookies between Netscape cookies.txt, JSON and the header form — in your browser, nothing uploaded.
cookie converter netscape to json · runs in your browserProxy list formatter
Clean a messy proxy list: normalise, dedupe and convert between host:port:user:pass and user:pass@host:port.
proxy list formatter · runs in your browserCanvas fingerprint hash
Render a 2D canvas the way trackers do, hash the pixels, and see the value that identifies your machine.
canvas fingerprint · runs in your browserJA3 / TLS fingerprint
What a JA3/JA4 TLS fingerprint is, what a server reads from your handshake, and what a browser can and cannot show.
ja3 fingerprint · runs partly on our serverHow these work. Tools marked runs in your browser never send what you type anywhere — the work happens on your machine. Tools marked runs partly on our server need the network to see your exit address or reach a proxy; the server keeps only aggregate counters, logs no request bodies, and anything you paste is used for that one request. Use a test credential where you can.
One reading is a fact, not a verdict
These tools show you what a site sees. What a site does with it is its own call, and it changes site to site. So read them as evidence — your timezone is one place, your IP is another — never as a score that says you are safe. For the long version, the guides and the glossary explain each surface.
Do these tools store what I enter?
No. The tools that work in your browser never send what you type anywhere. The few that need the network — the proxy checker, and anything that reads your exit IP — keep only aggregate counters, log no request bodies, and use anything you paste for that one request. Use a test credential where you can.
Are the tools free?
Yes, all of them, with no account and no sign-up. They are here because they are useful, and because the questions they answer are what Mosaic is built around.
Does a clean result mean a site will let me in?
No, and no tool can tell you that. These show what a site can read about you; what a site decides to do with it is its own call and differs site to site. Read a result as a fact — your timezone is one place, your IP is another — not as a verdict.
What does Mosaic have to do with them?
Mosaic is a local-first anti-detect browser: it gives every account its own fingerprint, proxy exit and cookies, and keeps them consistent so they are not tied together. The tools measure the same things Mosaic sets per profile.
Every account its own browser. One price for all of them.
Free holds 3 profiles and 10 profile creations, with no card. Pro is $49 a month for any number, or $490 a year with 2 months free. Try it for 14 days; cancel before day 14 and you pay nothing.