Sign PDF

Sign PDF Online Free

Use Sign PDF when everyday paperwork needs a visible signature: approval forms, school documents, delivery confirmations, simple agreements, invoices, or internal sign-offs.

Draw a signature, type one, or use a signature image, then place it on the page and download a signed copy while keeping the original file unchanged.

What this tool helps with

Draw, type, or upload a visual signature
Place the signature on a PDF page
Resize the signature before export
Download a signed PDF copy

Supported formats

Input: PDF files supported by the browser PDF workflow.
Output: a new PDF copy with a visible signature placed on selected pages.
This is visual signing, not certificate-backed digital signing.

Best for

Approval forms and acknowledgements
School or office paperwork
Delivery confirmations and simple agreements
Internal sign-offs where a visible signature is enough

Limits to know

This tool adds a visible signature layer and does not cryptographically prove identity.
Some organizations require a certificate-backed signing workflow instead.
Damaged, protected, or unusual PDFs may need a different workflow first.

How it works

Open the Sign PDF workspace.
Add the PDF that needs a signature.
Draw, type, or upload the signature, then place and resize it on the page.
Download the signed PDF copy and review it before sending.

Open Sign PDF or browse all PDF tools.

Processing and original-file safety

Drawn, typed, or uploaded visual signatures are created and placed on supported PDF pages in the browser, then embedded into a new PDF copy.

The source PDF and the signature source remain separate from the downloaded signed copy. Delete temporary signature images from shared devices after use.

Tested limits and output tradeoffs

Enforced limits

One PDF up to 100 MB can be opened per signing workspace.
The placement editor enforces a minimum visible signature box of 44 by 18 page units and caps drawing-canvas pixel density to control memory use.

What the output may change

This is a visible signature layer, not a certificate-backed digital signature and not cryptographic identity proof.
Some legal, financial, government, or regulated workflows require a named e-signature provider or certificate process instead.

First-party QA note

Reviewed 2026-07-19: First-party QA verified three signature sources - draw, type, and image upload - plus minimum placement sizing and high-density typed-signature rendering.

Implementation review of signature creation, page placement, resizing, and PDF embedding.

Troubleshooting

If a signature looks blurry, redraw it at normal zoom or upload a clear transparent PNG.
If placement is difficult, zoom the page and use numeric width or height controls for a final adjustment.
Confirm that every required page is signed before downloading; the tool does not decide which fields are legally required.

Desktop and phone notes

Touch drawing is supported and is often easiest with the phone in landscape orientation.
Typed signatures are rasterized for consistent placement, while uploaded images should be cropped before use.

Related practical guides and tests

These QuickerConvert articles explain the closest workflow, measured limit, or output tradeoff for this tool.

Common questions

Is this a digital signature?

No. It adds a visible signature to the PDF. It is not a certificate-backed digital signature.