This webapp lets you authenticate cryptographically (PGP) signed files right in your browser.
To start simply drag & drop the publisher's public key, the signature file and the file itself from your desktop,
download bar or folder, or click on the icons to select them.
You can also fetch keys from a key server by selecting the option "Server" after clicking the Key icon.
Hint: Add the signature and file first to avoid having to copy/paste the key id to the fetch dialog.
Verify the authenticity and integrity of files based on cryptographic digital signatures.
This tool uses a modified version of the openpgp.js LGPL library. License information and source code is available here