How is this different from other online PDF tools?

Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.

Are my PDF files uploaded?

No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.

Can I verify that files are not uploaded?

Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.

Does this tool work offline?

Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.

What happens when I refresh the page?

Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.

Does this tool store my files?

No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.

Can this tool unlock password-protected PDFs?

No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.

What technologies does this tool use?

This tool uses the Canvas API to capture your drawn signature and client-side JavaScript with pdf-lib to stamp it onto the PDF — your files never leave your browser.

Does this tool use WebAssembly?

No. This tool uses client-side JavaScript and pdf-lib for local PDF structure editing. No WebAssembly is involved.

Is this a legally binding electronic signature?

The tool adds a visual image of your signature to the document, which many jurisdictions accept for everyday paperwork. It is not a certificate-based digital signature; for documents that require cryptographic signing, use dedicated signing software.

How do I draw and place my signature on a PDF?

Pick a PDF with the file selector, then draw your signature on the white pad using a mouse, finger, or stylus. Choose which pages to sign, the position on the page, and the size with the width slider, then select Sign to stamp it and save the result directly from your browser.

Why does my signature get placed in the same spot on every page I selected?

The signature is stamped at one of nine fixed anchor positions (such as bottom-right or center), and that same anchor is applied to each page in your selection. If you need it on just one page, choose First page only or Last page only instead of All pages, since the default targets the last page.

How is the signature size determined, and why is the background of my signature transparent?

The width slider sets the signature as a percentage of the page width (from 5% up to 60%, with the height scaled to keep the aspect ratio), and it is capped so it never exceeds the printable area. The pad is automatically cropped to the ink you drew and exported as a PNG with a transparent background, so only your strokes appear over the page, not a white box.

Does Sign PDF (Draw Signature) cost anything to use?

Sign PDF (Draw Signature) is completely free — no account, no sign-up, and no cap on how many PDFs you sign. Your drawn signature and your document are processed entirely within your browser using the Canvas API and pdf-lib, so neither the file nor your signature is ever sent anywhere; this matters because a handwritten signature is sensitive personal data, and it always will be free to use.

Draw Your Signature and Sign a PDF Privately — In Your Browser

Draw your signature on the canvas, pick the pages and position, and the signature is stamped into the PDF locally — nothing ever leaves your browser.

Quick answer

What it does: Draw your signature on the canvas, pick the pages and position, and the signature is stamped into the PDF locally — nothing ever leaves your browser.
Free?: Yes — 100% free, no account or sign-up.
Files uploaded?: No — everything is processed in your browser.
Works offline?: Yes — once the page has loaded.
Best for: A freelancer signs a client contract PDF by drawing their signature on a trackpad and downloads the signed file without printing.
Good to know: This adds a visual signature image — it is not a cryptographic digital signature and carries no certificate.

How it works

Select a PDF file from your device using the file picker.
The file is read into browser memory — no data leaves your browser.
Draw your signature on the signature pad with a mouse, finger, or stylus.
Choose which pages to sign, the position on the page, and the signature size.
pdf-lib stamps the signature image onto the chosen pages and the signed PDF is offered as a download directly from your browser.

When to use this tool

A freelancer signs a client contract PDF by drawing their signature on a trackpad and downloads the signed file without printing.
A small business owner draws a signature on a phone touchscreen and places it on the correct page of a supplier agreement.
A student signs an academic declaration PDF using a stylus, positions the signature on the page, and saves the signed copy.
This adds a visual signature image only — it is not a cryptographic digital signature and may not satisfy formal e-sign requirements.

Frequently asked questions

How is this different from other online PDF tools?: Most online PDF tools send your files to a remote server for processing. This tool processes everything locally in your browser using client-side JavaScript. Your files are never transmitted to any server, which means your document content stays entirely under your control.
Are my PDF files uploaded?: No. Your files are read directly by your browser. Your files are never transmitted over the network. The tool works entirely within the browser tab you have open.
Can I verify that files are not uploaded?: Yes. Open your browser's developer tools (F12), go to the Network tab, and watch for any outgoing requests while using the tool. You will see no file data leave your browser. The site may record an anonymous page-view count, which never includes your files and can be disabled.
Does this tool work offline?: Yes, once the page has loaded the tool processes your files entirely in your browser; tool functionality needs no network connection. You can disconnect from the internet and continue using it.
What happens when I refresh the page?: Because nothing is stored on a server, refreshing the page clears your current session. Any files you had selected will need to be selected again.
Does this tool store my files?: No. Files are held in browser memory only for as long as the page is open. Closing or refreshing the page discards them. Nothing is written to disk by the tool, and nothing is sent to a server.
Can this tool unlock password-protected PDFs?: No. This tool does not attempt to remove or bypass PDF password protection. If you know the password, the Unlock PDF tool on this site can remove it locally; then this tool can process the file.
What technologies does this tool use?: This tool uses the Canvas API to capture your drawn signature and client-side JavaScript with pdf-lib to stamp it onto the PDF — your files never leave your browser.
Does this tool use WebAssembly?: No. This tool uses client-side JavaScript and pdf-lib for local PDF structure editing. No WebAssembly is involved.
Is this a legally binding electronic signature?: The tool adds a visual image of your signature to the document, which many jurisdictions accept for everyday paperwork. It is not a certificate-based digital signature; for documents that require cryptographic signing, use dedicated signing software.
How do I draw and place my signature on a PDF?: Pick a PDF with the file selector, then draw your signature on the white pad using a mouse, finger, or stylus. Choose which pages to sign, the position on the page, and the size with the width slider, then select Sign to stamp it and save the result directly from your browser.
Why does my signature get placed in the same spot on every page I selected?: The signature is stamped at one of nine fixed anchor positions (such as bottom-right or center), and that same anchor is applied to each page in your selection. If you need it on just one page, choose First page only or Last page only instead of All pages, since the default targets the last page.
How is the signature size determined, and why is the background of my signature transparent?: The width slider sets the signature as a percentage of the page width (from 5% up to 60%, with the height scaled to keep the aspect ratio), and it is capped so it never exceeds the printable area. The pad is automatically cropped to the ink you drew and exported as a PNG with a transparent background, so only your strokes appear over the page, not a white box.
Does Sign PDF (Draw Signature) cost anything to use?: Sign PDF (Draw Signature) is completely free — no account, no sign-up, and no cap on how many PDFs you sign. Your drawn signature and your document are processed entirely within your browser using the Canvas API and pdf-lib, so neither the file nor your signature is ever sent anywhere; this matters because a handwritten signature is sensitive personal data, and it always will be free to use.