Sign a PDF
Drop a PDF, place your signature, download the signed file — all in this tab, with no upload. Sending it to someone else to sign, or handing it to your phone by QR, uploads an encrypted copy so the other device can open it.
No PDF handy?
Private e-signatures, verifiable by anyone
Sign a PDF in your browser — draw or type a signature, place it, and download, with no upload. Sending it to someone else to sign uploads an encrypted copy, and we say exactly what we hold.
Signing uploads nothing
Signing a PDF yourself runs entirely in your browser — open your network tab and watch: the file never leaves your device. Most online tools round-trip your document through their servers. The exception is handing it to someone else: sending for signature, or the QR handoff to your phone, uploads a copy encrypted in your browser so the other device can open it. We hold that ciphertext for 7 days.
Verifiable on any device
Add an optional tamper-evident audit trail, and a signature anyone can verify offline at attachkit.com/verify — no account, no callback to us. Most e-sign tools lock verification inside their platform.
ESIGN / UETA e-signatures
Designed to meet the US ESIGN Act and UETA requirements for a valid electronic signature. Save your signature once and reuse it across documents.