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Sign PDF Documents

Draw your signature and stamp it securely on your PDFs locally.

Upload PDF to Sign

Click or drag & drop a .pdf file here.
Processed securely in your browser.

How to e-sign a PDF safely

Need to sign a contract, waiver, or invoice but don't want to upload it to an unknown server? Otter Digitals' Sign PDF tool processes everything using JavaScript directly in your browser. This means your sensitive documents never leave your computer.

  • Otter Logo
    Click the "Upload PDF to Sign" box and select your file.
  • A window will appear allowing you to draw your signature using your mouse, trackpad, or stylus.
  • Click Place Signature and drag the image to your desired location.
  • Use the slider to make your signature bigger or smaller to fit the line.
  • Click Download Signed PDF to save the final document to your device.