Security
Encrypt a file, hash it, or see what a public page exposes.
What you can do
- Encrypt a file or a folder with a passcode you choose.
- Compute a SHA-256 checksum.
- Show your IP, compare two public DNS resolvers, and read a browser fingerprint.
- Look up a site’s Mozilla Observatory header grade.
- Encrypt a fileEncrypt one file or a batch of files in the browser. Download Hash_Lock for the database.
- SHA-256 checksumHash a local file so you can compare it to a published checksum.
- Website security checkLook up a public site’s Mozilla Observatory grade for security headers. It is not a trust or scam score.
- What's my IPShow the public IP address seen for this browser and a city-level location guess.
- Is my DNS misconfigured?Compare Cloudflare and Google public DNS for a name you type. Your computer's resolver is not visible to a web page.
- What's my browser fingerprint?List the screen size, fonts, browser, and device details this page can already see. Nothing is uploaded.