seal a file.
Drag a file, sign it, and get a receipt in under a second.
You bring the file. Seal hashes it on your device, signs the hash with your key, and anchors the receipt to chain. The content itself never leaves your machine.
costfree · first 1k/day
formatsany
receiptinstant
storagecontent stays with you
what happens next
The receipt is public immediately. Anyone you share the file with can verify it against the ledger, forever — no account, no API key, just the hash.