Sign a PDF Privately — Browser-Only, No Servers
Most online e-signature tools upload your PDF to a server, process it there, and stream the signed file back. GhostSign does the opposite: PDF bytes never leave your browser. The signing, certificate generation, and download all happen client-side in JavaScript and WebAssembly. You can verify it yourself — open DevTools, switch to the Network tab, and watch: zero requests carry your file.
What "private" actually means here
- 100% client-side PDF processing — verify in DevTools that no request carries your file
- No upload endpoint exists for solo signing — there is no server to leak from
- No account, no email, no IP-linked usage log — we cannot tie a document to you because we never see it
- Open-source crypto: AES-GCM 256 and SHA-256 from the Web Crypto API, no homebrew
- Tab close = total cleanup. There is nothing on disk and nothing on our servers