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Is there a file size limit to sign a PDF?
Updated July 2026
On the free plan you can sign a PDF with files up to 10 MB and 25 pages. Pro raises this to 200–500 MB and up to 1000 pages, and Lifetime to 1 GB with unlimited pages. Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again.
Answer
On the free plan you can sign a PDF with files up to 10 MB and 25 pages. Pro raises this to 200–500 MB and up to 1000 pages, and Lifetime to 1 GB with unlimited pages. Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again.
More about sign pdf
A clear electronic signature is legally valid for everyday agreements in most countries.
Cryptographic digital signatures bind the signature to the document for higher assurance.
You can fill form fields and sign in the same tool without printing.
How to sign a PDF
- 1
Open the sign tool
Sign in and open the sign-and-fill tool.
- 2
Create your signature
Draw it, type it in a signature font, or use a digital certificate.
- 3
Place it and fill the form
Drop the signature where it belongs and fill any fields, dates or checkboxes.
- 4
Download the signed PDF
Save the signed document with no watermark.
Common questions
- How do I sign a PDF online for free?
- Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again. On Arthize it's free with no watermark and processed privately.
- Is an electronic signature on a PDF legally valid?
- Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again. On Arthize it's free with no watermark and processed privately.
- Can I fill in a form and sign it?
- Signing a PDF lets you draw, type or add a digital signature and fill form fields, so you never print, sign and rescan a document again. On Arthize it's free with no watermark and processed privately.
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