How to Sign a PDF Online: Draw, Type, or Upload a Signature
Quick answer
Drawing suits a handwritten look when you have a mouse, finger or stylus; typing is faster for a signature you reuse; uploading works when you already have a clean scan or transparent PNG. Whichever you choose, place it in the correct signature block and check the signer name, page position and document version before downloading. Sign PDF needs no account — upload, place everything, and download the signed copy.
Choose the signature method that fits the document
Drawing works well when a mouse, finger, or stylus is available and you want a handwritten appearance. Typing is faster for repeatable signatures, while an uploaded signature is useful when you already have a clear scan or transparent PNG.
Whichever method you choose, place it deliberately in the correct signature block and include a date or supporting text field when the document requires it.
Review before you finalize
Check the signer name, page position, document version, and every visible field before downloading. A signature placed on an earlier draft can create avoidable confusion even when the mark itself looks correct.
Keep the unsigned source separately. The signed result should be treated as a final record, because later editing can change the document that the signature was intended to approve.
Protect and share the final PDF
After signing, use password protection when the document contains confidential information. Send the password separately from the attachment, and make sure recipients know which final version they should retain.
NexaPDF AI doesn't ask you to sign in at all: upload the document, place everything, and download the signed copy without an account. Use is metered by a daily credit allowance instead, and signing in (free, no payment involved) raises it and keeps a signing history you can return to.
Frequently asked questions
Is an electronic signature legally valid?
That depends on your jurisdiction and the kind of document, and it is not a question a tool can answer for you. What a signing tool gives you is the mark and the record; whether a particular agreement needs a handwritten signature, a witness or a specific form of certificate is worth checking for anything consequential.
Do I need an account to sign a PDF?
No. Upload the document, place everything, and download the signed copy without signing in. Use is metered by a daily allowance that renews; signing in is free, raises that allowance, and keeps a history you can come back to.
Which method should I use if I only have a trackpad?
Typing. A trackpad-drawn signature tends to come out shaky and unlike your actual hand, while a typed one is consistent and legible. Drawing is worth it with a touchscreen or stylus, where the result genuinely looks handwritten.
Can I edit a PDF after signing it?
You can, but the result should not be treated as the same document. A signature approves one specific version, so editing afterwards changes the thing that was approved. Keep the unsigned original for further edits and treat the signed file as a final record.