SealZero
Zero-knowledge proofs for authentic, privacy-safe images
What it does
SealZero lets you prove image and document authenticity using zero-knowledge proofs — fully client-side. You can selectively mask sensitive parts of a document, share the modified version, and provide a cryptographic proof that guarantees authenticity and integrity. No data ever leaves the browser. Proof size is under 11kB. Open-source and built for real-world use.
Does a similar job
all alternatives →- LSLet's Seal – Let's Encrypt for document signing, free and self-hostedJul 2026 · github.com · ▲94
TLDR, Let's Seal gives the finger to Adobe and every doc signing tool (docusign, google, etc) who pay to play with the Adobe Approved Trust List and then charge you for something that should be free. Currently even the person checking if a document/contract is sealed or code is authentic has to also be inside the same Adobe walled garden too. Verification, the part that should be free is the part everyone charges for. Thats the shape Let's Encrypt fixed for TLS, and I wanted the same thing for documents and files. The core idea therefore needed to go a bit beyond e signatures and i…
- SVSeal – Verifiable timestamp for your private ideas2022 · docs.planet.ink · ▲113
- GAGet a verifiable human proof seal for your content2023 · humanproved.com · ▲13
Get a unique seal and url that is verifiable. Display a unique badge next to your content that proves there is a human behind the content.
SealDoc — independently verifiableJul 2026 · sealdoc.eu · ▲3Compliance infrastructure for legally provable documents
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