Sign PDF

From ToolzPedia, the free tools encyclopedia
This is one of several pdf tools. For the full list of utilities, see All tools.

Adding a signature to a PDF used to mean printing the document, signing it with a pen, scanning it back in, and emailing the result, a workflow that wastes paper, time, and image quality. Modern e-signature tools eliminate all that, but the popular ones (DocuSign, HelloSign) typically require an account, charge per document, and upload your file to their servers.

The ToolzPedia Sign PDF tool lets you draw or type a signature directly into a PDF in your browser. The signed file is generated locally using pdf-lib and downloaded immediately, no signup, no server upload, no per-document fee. It is suitable for low-stakes signing (informal agreements, internal forms, signing your own documents); for legally-binding signatures across jurisdictions you may still want a service that provides an audit trail and tamper-evident certificate, but for the 80% of cases where you just need a signature on a page, this is faster and more private.

Use the tool edit

✍️
Drop PDF here or click to upload

Add a signature to any PDF · Drawn entirely in your browser

How to use Sign PDF edit

Follow these steps to use the tool:

  1. Upload your PDF

    Drop the PDF you want to sign onto the upload area. The tool reads the page count and shows the first page so you can see where you will be placing the signature.

  2. Create your signature

    Choose between drawing your signature with a mouse or touchscreen, typing it in a handwriting font, or uploading an existing signature image.

  3. Place the signature on the page

    Click on the page preview where the signature should go. Drag the corners to resize, drag the body to reposition. Switch pages using the page navigator if the signature goes elsewhere.

  4. Apply and download

    Hit Apply Signature. The tool bakes the signature into the page and offers the signed PDF as a download.

Frequently asked questions edit

It depends on jurisdiction and document type. In most countries, a visible signature on a PDF is legally equivalent to a wet-ink signature for routine agreements (consumer contracts, internal company forms, NDAs). For documents that require notarisation, witness signatures, or cross-border enforcement, use a dedicated e-signature platform that provides a full audit trail.
No. The PDF, your signature drawing, and the final signed file all stay in your browser. Nothing is uploaded.
Yes, apply the signature, navigate to the next page, place it again. There is no one-shot multi-page sign yet, but each page-level apply takes only a few seconds.
No. Once applied, the signature becomes part of the page content and cannot be moved or deleted in a PDF reader. This is intentional, it matches the behaviour of a real signature.
No. Remove the password first by opening the file in a PDF reader and saving an unlocked copy.
Yes, pass the signed PDF to the next person, who runs it through the tool and adds their own signature. The previous signatures are preserved as part of the page content.
No. This tool produces visible signatures only. For certificate-based signing, use Adobe Acrobat or a similar desktop tool.

Use cases edit

Internal company forms

Time-off requests, expense approvals, IT acceptable-use agreements, anything that needs your signature but does not require a third-party audit trail.

Informal agreements with friends or family

Loan acknowledgements, room-rental agreements, simple service contracts.

NDAs for early-stage conversations

Quick mutual NDAs before sharing a pitch deck or technical details with a potential collaborator.

Signing your own documents

Adding a signature to invoices, letters, or PDFs you authored yourself before sending them out.

Receipts and acknowledgements

Confirming receipt of equipment, documents, or deliveries.

How it works edit

The signature you draw on the canvas is captured as an array of stroke coordinates (and optionally pressure data on touch devices), then rendered to a transparent PNG in memory. pdf-lib embeds that PNG into the PDF page at the position and size you chose, producing a new PDF with the signature baked into the page content. Typed signatures use a handwriting-style font rendered to a PNG via the Canvas API, then embedded the same way.

Critically, the signature becomes part of the PDF page content, it is not an annotation that can be deleted by opening the file in a PDF reader. This is the same behaviour as a printed-and-signed document: the mark is permanent. There is no cryptographic signing or audit trail, however; for documents that need to be verifiably untampered, look at desktop tools that produce PAdES or PKCS#7 signatures.

Tips and best practices edit

  • Drawing on a touchscreen with a stylus produces the most natural-looking signature; mouse signatures often look angular.
  • If you sign many documents, save your signature as a transparent PNG once and reuse it via the upload option.
  • Place signatures in the same area the printed line indicates, typically just above a printed line and to the left of the date field.
  • For multi-page documents that need initials on every page, you will need to apply the signature to each page individually; there is no batch-apply yet.

Common mistakes edit

Treating in-browser signatures as cryptographically valid

A drawn signature is visually identical to a scanned ink signature, but it is not cryptographically signed. For high-stakes legal documents, use a service that provides PKI signing.

Signing the wrong page

Always verify the page number before applying. Use the page navigator to confirm.

Forgetting to date the signature

Most signed documents include a date next to the signature. The tool does not auto-date, type the date in the same way you placed the signature.

Your files stay private. This tool processes files entirely in your browser using JavaScript. No file is uploaded to any server.

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See also edit