Add Signature to PDF
Draw, type or upload a signature and place it on PDF
How to Use Add Signature to PDF
- Upload the PDF you need to sign.
- Create your signature by drawing it, typing your name in a handwriting font, or uploading an image.
- Click the position on the page where the signature should sit.
- Adjust the size, then choose which page it belongs on.
- Apply and download the signed document.
About Add Signature to PDF
What this page solves
Add Signature to PDF solves the privacy and friction problem of typical online tools — it never uploads, never asks for a signup, and runs in your browser.
Add Signature to PDF is a free, privacy-first PDF utility that lets you draw, type or upload a signature and place it on pdf entirely in your browser. Unlike most online PDF services, Add Signature to PDF never uploads your documents — every page is parsed, modified, and re-saved locally using pdf-lib and the browser's built-in capabilities. That makes it a safe choice for confidential files such as contracts, invoices, medical records, tax forms, or signed agreements that should never touch a third-party server. Output PDFs are clean: no watermark, no "Made with X" footer, no metadata injected into the document properties. Add Signature to PDF preserves PDF metadata, bookmarks, internal links, and form fields where the operation allows — what comes out is the same document, modified only where you intended. Add Signature to PDF uses `pdf-lib` under the hood — the same library powering many open-source PDF tools — so the output PDFs open correctly in Acrobat, Preview, browser viewers, and printer drivers. Add Signature to PDF follows a clean four-step workflow (Upload → Edit → Process → Download) inspired by the best desktop PDF apps and is part of our broader PDF Tools collection. If you also need a complementary utility, try our PDF Merger. It is free with no signup, no watermark, and no page count limits beyond what your device can handle.
Common Use Cases
- Process confidential business documents without uploading them
- Prepare contracts, invoices, or signed agreements before sharing
- Edit scanned documents and forms locally on your device
- Combine PDF tools in a chain — output of one becomes the input of the next
- Handle large or sensitive PDFs that exceed typical online upload limits
- Reorganising legal exhibits or evidence bundles before sending to opposing counsel
- Re-ordering scanned pages that came out of a document feeder in the wrong sequence
- Sanity-checking the output of an automated pipeline before shipping the result downstream
Related tools in PDF Tools
- PDF MergerCombine multiple PDF files into one document
- PDF SplitterSplit a PDF into multiple files by page ranges
- PDF Page ExtractorExtract specific pages from a PDF into a new file
- PDF Page RemoverRemove unwanted pages from PDF files
See all PDF Tools.
Frequently asked questions
Is this a legally binding signature?
It depends entirely on jurisdiction and context. Many places accept an electronic signature for routine agreements, and a visible signature image often satisfies that. It is not a cryptographic digital signature with a verifiable certificate, which some regulated contexts require. If the document is legally significant, check what standard applies.
What is the difference between this and a digital signature?
This places a visual image of your signature onto the page. A cryptographic digital signature embeds a certificate that proves who signed and detects any later modification. Those require a certificate authority, which is outside what a browser tool can provide.
Can the signature be removed by someone else?
It becomes part of the page content rather than a separate annotation layer, so it cannot simply be deleted. Someone with PDF editing software could still obscure or edit it, as with any visual element.
How do I get a clean signature image?
Sign on white paper with a dark pen, photograph it in good light, then remove the background using the Background Color Replacer tool in transparent mode. Upload the resulting PNG.
How to use Add Signature to PDF?
1) Open the tool. 2) Enter or upload your input. 3) Get your result instantly. Everything happens locally — nothing is uploaded.
When should I use Add Signature to PDF?
Use Add Signature to PDF whenever you need a fast, private, browser-based way to draw, type or upload a signature and place it on pdf.
Is Add Signature to PDF safe?
Yes. Add Signature to PDF runs 100% in your browser. Inputs are never uploaded, stored, or logged — safe for confidential content.
Will quality be affected by Add Signature to PDF?
No quality loss for text and vector content. Embedded images keep their original resolution unless you compress them.
What formats does Add Signature to PDF support?
Add Signature to PDF supports PDF (any version), with import/export to JPG, PNG and TXT in related tools
Is Add Signature to PDF free?
Yes — Add Signature to PDF is completely free, with no registration, no watermarks, and no usage limits.
Is my PDF uploaded to a server?
No. Add Signature to PDF processes PDFs entirely in your browser using pdf-lib. Your documents never leave your device.
Are there file-size or page limits?
There are no enforced limits. Performance depends on your device — files up to about 100 MB process smoothly on most modern browsers.
Will the output have a watermark?
Never. Add Signature to PDF produces clean PDFs with no added branding, watermarks, or metadata.
Does Add Signature to PDF support password-protected PDFs?
If the PDF requires a password to open, you must unlock it first (our PDF Unlocker tool handles this when you know the password). Owner-restricted PDFs (printable but not editable) can be processed by some tools — the UI will indicate when a restriction blocks the operation.