Let's Seal is a software project built with digital-signature, document-authentication, open-standard, listed on Viber's Vault, a community directory of vibe-coded and AI-assisted software. It is available at app.letsseal.org.
🔏 Let's Encrypt, but for proving a file is real. Let's Seal is an open standard for sealing any file so anyone can later verify it is unaltered, signed by a known certificate, and existed by a certain date. One approach covers documents, images, email, source code and containers. Seal a PDF from the command line with sealbot , or drop one into the hosted app and get back a sealed copy with a public proof link. There is a web verifier, SDKs for any language, and a self-host option. Free forever…
Tags: digital-signature, document-authentication, open-standard, security, c2pa, cryptography, open-source, provenance, e-signature, supply-chain