Sign PDFs with Adobe Acrobat & Free Alternatives

Quick answer: Sign a PDF in Adobe Acrobat using the Fill & Sign panel — type, draw, or insert a signature image. Open PDF 签名 — everything runs locally in your browser, and files never leave your device.

Steps

1. Open the PDF in Acrobat → right panel → "Fill & Sign".
2. Click a signature field; create your signature by typing, drawing, or uploading a photo of your ink signature.
3. Position and size it, then confirm.
4. Save and send the signed file.

Important notes

• This is a visible signature, not a certificate-based digital signature — different legal weight; confirm what the counterparty requires.
• Only need to fill form fields? DocsAll's Form Filling tool does that in the browser with no install.
• Re-check after signing: send the saved version, not the original.

Common questions

Can I edit after signing? Subsequent edits do not invalidate a visible signature, but best practice is sign last and ship.

The recipient cannot see my signature? Some preview panes skip signature layers — ask them to open it in a real PDF reader.