SignSeal - PDF Digital Signature Tool

Sign PDFs with digital signatures and timestamps. Draw, type, or upload signatures — all offline.

Overview

SignSeal enables you to add legally-binding digital signatures to PDF documents entirely in your browser. Create signatures by drawing, typing, or uploading images. Add timestamps, custom text, and position signatures precisely. All processing happens client-side, ensuring your documents never leave your device.

Features

  • Draw signatures with mouse or touch
  • Type signatures with custom fonts
  • Upload signature images
  • Add timestamps and custom text
  • Position signatures precisely
  • Completely offline processing
  • No server upload required
  • Works with multi-page PDFs

Use Cases

  • Sign contracts and agreements
  • Add signatures to legal documents
  • Timestamp important documents
  • Sign forms and applications
  • Create legally-binding signatures

Privacy & Security

All SignSeal - PDF Digital Signature Tool operations are performed entirely in your browser. Your data never leaves your device and is never transmitted to any server. We implement zero-knowledge architecture to ensure maximum privacy and security.