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Sign a PDF online
Add your signature to a document without printing it. Draw, type or drop in a saved signature, fill any form fields, and download — all inside a private workspace, so a signed contract never sits on a public server.
How to sign a PDF
- 1
Open the sign tool
Sign in and open your PDF in the Arthize sign-and-fill tool.
- 2
Create your signature
Draw it with a mouse or finger, 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 text fields, dates or checkboxes.
- 4
Download the signed PDF
Save the signed document with no watermark. The file is deleted after the job.
Sign without Adobe
Draw, type or use a cryptographic digital signature — no Acrobat subscription required.
Fill forms too
Complete text fields, dates and checkboxes in the same place you sign.
Private & free
Signing runs in your own workspace and the file is deleted afterwards. Free plan, no watermark.
Common questions
- How do I sign a PDF online for free?
- Open the sign tool, create a signature by drawing, typing or using a digital certificate, place it on the document, fill any fields, then download. It's free with no watermark.
- Is an electronic signature on a PDF legally valid?
- In most countries a clear electronic signature is legally valid for everyday agreements. For higher assurance, Arthize also supports cryptographic digital signatures that bind the signature to the document.
- Can I fill in a form and sign it?
- Yes. You can complete text fields, dates and checkboxes and add your signature in the same tool.
More PDF tools
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Arthize bundles 50+ PDF tools in one private workspace. Start free — no watermark, no credit card.
Sign a PDF free