Sign your own document

Drop your document. It never leaves your device.

NightSign reads your file right here in the browser and computes its fingerprint. Only that 64-character fingerprint goes into the receipt — the file itself is never uploaded.

V0 boundary: this proves a file with this exact fingerprint was receipted at this time — not legal identity, notarization, wallet ownership, or Midnight anchoring. Change one byte of the file and the fingerprint won't match.