Sign PDF

Sign PDF is an online tool that runs entirely in your browser to add a signature to PDF files. You can draw a signature directly on the page or upload an existing signature image, then drag it into place, resize it, choose which pages to sign, and download the result. Nothing is uploaded to a server, making it handy for documents that need a quick signature, mark, or name.

Key Features

• Handwritten signature: a built-in pad lets you sign with a mouse or touchscreen, pick the ink color, and clear it to redo in one click.
• Upload a signature image: supports PNG, JPG, and WebP; a transparent PNG is recommended for a cleaner look.
• Drag to position and resize: move the signature on the preview, drag its corners to scale proportionally, or set the width precisely with a slider.
• Flexible page range: sign only the last page, every page, or just the page you are previewing.
• Live page-by-page preview: flip through pages before and after signing, and switch between files for a WYSIWYG view.
• Batch processing and ZIP: add multiple PDFs that share one signature, stop at any time, then download results one by one or as a ZIP.
• Local and secure: signing happens in your browser; neither the PDFs nor the signature are uploaded to a server.

Use Cases

• Quickly signing internal approval forms, confirmations, or receipts.
• Placing a signature image on a contract or agreement so it is ready to print or archive.
• Marking a signature, initials, or personal identifier on every page or the last page.
• Processing several PDFs at once with the same signature, then downloading them together.

Important Note About Signature Validity

This tool stamps your signature onto PDF pages as an image — a visual signature only. It contains no digital certificate, offers no signature verification, and is not a legally valid electronic signature. If your document requires a certified, verifiable, legally binding e-signature, please use a professional electronic-signature service that complies with the relevant regulations; this tool is not meant for such cases.

How to Use

1. Click the upload area or drag PDFs into it; you can select multiple files at once.
2. Choose "Draw" to sign directly, or "Upload image" to load an existing signature (for nicer handwriting, generate a transparent PNG with an online signature maker first, then upload it).
3. Drag the signature into place on the preview, adjust its size, and choose which pages to sign.
4. Click "Sign PDFs" and the tool processes each file in turn, showing progress.
5. When finished, download the results individually or as a ZIP package.

FAQ

Q: Is this tool free?

A: Yes, signing and batch processing are completely free, with no registration or sign-in required.

Q: Are my files and signature safe?

A: Yes. Everything runs locally in your browser, so neither the PDF files nor the signature image are uploaded to a server.

Q: Is a signature added this way legally binding?

A: No. This tool only stamps the signature as an image; it has no digital certificate, no verification, and no legal effect as an electronic signature. Use a professional e-signature service when legal validity is required.

Q: Can I sign an encrypted PDF?

A: No. An encrypted file triggers a "password-protected" notice; remove the password first with the Unlock PDF tool, then sign.

Q: Does it work on mobile devices?

A: Yes. The page is responsive and the drawing pad supports touch, so you can sign, preview, and download on phones and tablets.