How to Sign a PDF (2026)
Learn how to sign a PDF online from any device and send it for signature. A plain-English, cross-device guide with legally binding signatures and a full audit trail.
Signing a PDF used to mean printing, scribbling, scanning, and emailing back a blurry file. It doesn't anymore. You can sign a PDF online from your phone, tablet, or computer in about two minutes, and the result is just as legally binding as ink under the ESIGN Act (2000) and UETA (1999). The catch with most tools is the cost and the friction: envelope caps, per-seat fees, and forcing the other person to make an account. sign.pink does it differently for $3 a month, with no caps, no per-seat charges, and no account required for the people you send to. Every document also gets a tamper-evident audit trail, so you can prove who signed, when, and that nothing changed afterward. Here is how to sign a PDF and how to send one for signature.
- 1
Open your PDF on any device
Go to sign.pink in any browser on your phone, tablet, or computer. Upload the PDF you want to sign by dragging it in or tapping to choose the file. There is nothing to install, and the same flow works on iPhone, Android, Mac, and Windows.
- 2
Place a signature field
Tap or click the spot in the document where the signature belongs. Add a signature field there, plus any extra fields you need such as a date, initials, or a text box. You can drag fields to line them up exactly with the printed signature line.
- 3
Sign the document
Create your signature by drawing it with your finger or mouse, typing your name, or uploading an image of your signature. Place it in the field. Review the whole document one more time to make sure everything reads correctly before you finalize.
- 4
Send it to others for signature (optional)
If someone else needs to sign too, enter their email and the order in which people should sign. They get a link and can sign right in the browser, with no account or app required. You will see when each person opens and completes the document.
- 5
Finalize and apply the tamper-evident seal
Once all required signatures are in, finalize the document. sign.pink locks the file with a tamper-evident seal so any later change to the content would be detectable, and it records each signer's action with a timestamp.
- 6
Download the signed PDF and audit trail
Download the completed PDF along with its audit trail, which captures who signed, when, and supporting details. Keep both together. This record is what backs the document's authenticity if it is ever questioned.
FAQ
In most cases, yes. In the United States, electronic signatures carry the same legal weight as handwritten ones under the ESIGN Act (2000) and UETA (1999), which has been adopted by 49 states plus DC, with New York relying on its own ESRA. The keys are that signers intend to sign and agree to do business electronically. A few document types, such as wills and certain court orders, are excluded and may still need a wet signature. A clear audit trail, like the one sign.pink attaches to every document, helps you prove a valid signature later.
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Now do it for real — free to start.
Upload, sign, and send in minutes. $3/month for unlimited documents, with a tamper-evident audit trail.