WhereGoes
wheregoes.com
Follows a shortened link through every redirect and names the final destination
No sign-up
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coveryourtracks.eff.org
Measures how uniquely identifiable your browser is to a tracker.
The EFF's successor to Panopticlick runs a test against your browser and reports two things: whether your tracker blocking actually works, and how many bits of identifying information your fonts, canvas, screen and headers give away. The verdict — one in how many browsers looks like yours — is the number that makes fingerprinting concrete. Run it before and after changing an extension to see whether the change helped.
AltFTool does this too
If you would rather not leave the site, Browser Fingerprint Visualizer covers the same job here — free, no account, and it runs in your browser.
Open Browser Fingerprint VisualizerQuestions
Works the moment the page loads. No account, no email, no trial. It measures one browser profile at one moment against EFF's own sample, so the uniqueness figure is indicative rather than an absolute.
Yes. Cover Your Tracks sends your input to its own servers to process it. That is fine for public material; for anything containing personal data, use one of the on-device tools instead.
It measures one browser profile at one moment against EFF's own sample, so the uniqueness figure is indicative rather than an absolute.
Alternatives
Same category or same task, ordered by how closely they overlap.
wheregoes.com
Follows a shortened link through every redirect and names the final destination
bitwarden.com
Generates a random password or passphrase without leaving the page
dnsleaktest.com
Reveals which DNS servers are actually resolving your queries right now
haveibeenpwned.com
Tells you which data breaches your email address has turned up in
jimpl.com
Shows the hidden EXIF in a photo, including GPS, and gives you a stripped copy
justdeleteme.xyz
A directory of the direct links for deleting your account on hundreds of sites