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Send the seal to the server and embed a digital signature. Continue?

About this app

  • 🖌️ Easily create your own seal
  • 💻 Free to use in your browser
  • 📄 Paste the seal into Word or Excel documents
  • 🔏 Create signed PNG images to detect tampering
  • 🧐 Verify page shows signing information

How to use

  • 🔧 Change text in the left form to update the preview
  • 💾 Click Download PNG to save the image
  • 📋 Click the preview to copy the seal
  • 🔐 All processing is done in your browser and settings are saved automatically

About digital signatures

A digital signature encrypts seal settings and creation time in the image to prevent tampering. Signed PNGs behave like ordinary images and can be verified.

  • 🛡️ Changes after signing are detected during verification
  • 🕒 Records signing time and settings for later reference
  • 🖼️ Use it directly in your documents
  • 🔐 Signing is processed securely on the server and the private key is never exposed
  • ✉️ Including a verified email address proves the creator