CleanorTools
PDF

Sign PDF

Details

How to use Sign PDF

What the tool does, how to run it, and what to expect from the result.

How to sign a PDF in your browser

To sign a PDF with this tool, open the document, create your signature, drag it onto the page where it belongs, then export the signed copy. The whole flow happens in the browser, so the file is processed on your device and never sent to a server.

You can build a signature three ways: type your name and pick a style, draw it with a mouse or touchscreen, or upload an image of an existing handwritten signature with a transparent or white background. The same signature can be reused and placed on several pages of the same document.

  • Open one PDF from your device
  • Create a typed, drawn, or uploaded signature
  • Drag it into position on any page
  • Repeat on additional pages if needed
  • Export the signed PDF locally

Visible signatures vs. certificate-based digital signatures

This tool places a visible signature image into a fresh PDF export, which is the right fit for everyday forms, approvals, and routine handoff documents. It does not issue a certificate-based digital signature, so it will not embed a cryptographic identity certificate or a tamper-evident audit trail.

For most personal and business documents, a clear visible signature on a clean signed PDF is exactly what the recipient expects. If you need a legally certified digital signature with identity verification, use a dedicated certificate-authority service instead.

Is signing a PDF here private and safe?

Yes. Sign PDF runs client-side in your browser, so the source PDF and your signature are processed on your device and are never uploaded to a server. This makes it safe for contracts, agreements, and personal paperwork you would rather not send to a cloud service.

Because the work is local, nothing is stored after you close the tab. The exported signed PDF is created on your device and saved directly to your downloads.

Tips

Getting a better result out of Sign PDF

Specific settings and thresholds, not general advice.

  • This places a visual signature on the page. It is not a cryptographic digital signature, and it does not prove who signed or that the document has not changed since.
  • For most everyday agreements, a visual signature is what is expected and accepted. For anything legally weighty, a qualified digital signature is a different thing entirely, and this is not it.
  • Flatten the result before sending it. A signature that sits as a movable annotation can be dragged off the page by the recipient.
  • Sign last. Merging, compressing or reordering after signing will either move the signature or, in the case of compression, rasterize the whole page.
  • Place the signature where the line is, at the size a handwritten one would be. An enormous signature reads as a paste-in, because it is one.
Limits

What Sign PDF does not do

The honest boundary, so you do not lose time finding it yourself.

  • It is not a cryptographic digital signature. It proves nothing about identity or integrity.
  • It does not verify or validate existing signatures.
  • It does not lock the document against further editing.
  • It cannot sign a password-protected PDF without unlocking it.
Reference

Terms used on this page

Short, plain-language definitions for the formats and settings above.

Files & formatsDigital signatureA digital signature on a PDF marks who signed a document and confirms it has not been altered since. It ranges from a simple drawn or typed signature image to a cryptographic signature backed by a certificate that can be mathematically verified.General
At a glance

Who Sign PDF is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

People signing routine forms, agreements, and approval documents without leaving the browser.

Ideal for

Everyday PDF signing where the main goal is to place a visible signature and export a shareable signed copy quickly.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

Is this PDF signing tool free?

Yes. Sign PDF is completely free with no account, watermark, or page limit, and it runs entirely in your browser.

Does it upload my PDF to a server?

No. The signing happens locally in your browser, so the PDF and your signature stay on your device and are never uploaded.

Can I upload an image of my signature?

Yes. You can type, draw, or upload an image of an existing handwritten signature, then place it anywhere on the PDF.

Does this create a certificate-based digital signature?

No. It places a visible signature into the PDF export rather than issuing a certificate-based digital signature with identity verification.

Can I sign multiple pages?

Yes. You can place your signature on one page or repeat it across several pages of the same document before exporting.

How do I sign a PDF?

Draw or upload your signature, place it on the page, and export. Everything happens in your browser and the document is never uploaded.

Is this a legally binding digital signature?

It is a visual signature, which is what most everyday agreements expect and accept. It is not a cryptographic digital signature and it proves nothing about who signed or whether the document changed afterwards.

Can the recipient move my signature?

If it stays as an annotation, yes. Flatten the document before sending it so the signature becomes part of the page.

Should I sign before or after merging the PDF?

After. Merging, reordering or compressing a signed document will move the signature or, in the case of compression, rasterize the whole page.

How big should the signature be?

About the size a handwritten one would be, placed on the signature line. An oversized signature reads as a paste-in, because that is exactly what it is.

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Do it all on your device

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