Browser extension
Know who you are really dealing with online.
Attestto warns you when a website is pretending to be another, lets you sign in without passwords, and carries your digital ID and documents safely. All from your browser, all on your device.
Free for individuals. No account needed. Works on Chrome, Brave, and Edge.
Protect
Protect yourself from fake sites.
It works on every site, with no setup and no account. Attestto checks the sites you visit and warns you the moment one is impersonating another.
Spot fake sites
Get warned the moment a site is pretending to be your bank, a store, or a government page.
Extra care where it matters
On pages that ask for personal or financial details, Attestto flags anything unsafe before you type.
Confirm official sites
On Costa Rican government and official sites, a small bar confirms the site is genuine.
See it
See it in action.
Sign in
Sign in without passwords.
Log in with an identity protected by your device's passkey, your fingerprint or face. Because your login is tied to the real website, a fake site cannot trick you into signing in.
A different identity on every site
So companies cannot link what you do on one site to another. You are not trackable across the web.
You stay in control
See every site where you have an identity, and remove any of them at any time.
Your wallet
Carry your ID and credentials.
Keep your digital ID and credentials in one safe place on your device: a certificate, a membership, a license, and more.
Share only what is needed
Prove that you hold a license or that you are over 18, without handing over the whole document or extra details.
Sign documents
Approve and sign forms and documents securely, tied to your identity.
Fill forms faster
Use your saved information to complete Attestto forms without retyping.
Your inbox
When a site asks you to prove or share something, it shows up here to review and approve.
Your data, in your hands
Never lose your identity.
Everything you hold stays yours, and you can move it with you.
Back it up
Save an encrypted backup, protected by a password only you know.
Restore it
Bring your identity and credentials back on a new device from your backup.
Import what you have
Add digital credentials issued to you elsewhere, like a course certificate.
Private by design.
Everything lives on your device, encrypted with your passkey. Attestto never sees or sends your browsing. Your data is never sold or shared.
FAQ
Common questions
Do I need to create an account?
No. The anti-phishing protection works the moment you install it, with no account and no setup. A digital identity is optional and lives only on your device.
Is it free?
Yes. Attestto is free for individuals, forever, for identity, signing, and verification.
What does Attestto see about me?
Nothing about your browsing. Your identity and credentials are stored on your device and encrypted with your passkey. Attestto never sees or sends the sites you visit.
How is it different from a password manager?
A password manager stores passwords. Attestto gives you an identity you control, warns you when a site is fake, and holds real credentials you can present, sharing only what a site needs.
Does it work on government sites?
Yes. On Costa Rican government and official sites, a small trust bar confirms the site is genuine so you can act with confidence.
What if I lose my device?
You restore everything from your encrypted backup, protected by a password only you know.
Is it open source?
Yes. The extension and its libraries are open source.
Your identity, in your hands.
Anti-phishing protection, passwordless sign in, and your digital ID. All in one extension.