Add a signature to PDF documents without printing
A landlord or new employer sends a PDF to "sign and return", and you don't have a printer or scanner. Sign a white sheet of paper, take a photo and send it with the PDF to your todo.is agent. It turns the photo into a clean transparent signature and places it on the right line, with your name and date if you want.
The prompt
- Sign the attached PDF for me: [ATTACH THE PDF]. Use my signature from [SIGNATURE IMAGE]: remove the paper background so only the ink shows, and keep it dark and sharp. Place it on [WHERE TO SIGN], sized to fit the line. Also add [EXTRA TEXT] next to it. Don't change anything else in the document. Send me a preview of the signed page first, then the final PDF named [FILE NAME].pdf.
What to change
- [ATTACH THE PDF]: Attach the PDF to sign (up to 50 MB).
- [SIGNATURE IMAGE]: E.g. "the attached photo" (sign in black pen on white paper, photo in daylight), or "the signature I gave you last time".
- [WHERE TO SIGN]: E.g. "the Tenant signature line on page 6", "every page in the bottom right" for initials, or "wherever it says Signature".
- [EXTRA TEXT]: E.g. "my printed name Laura Chen and today's date", "the date 08/10/2026" or "nothing".
- [FILE NAME]: E.g. "Lease_Agreement_signed_Chen".
Example result
- Signing report: Lease_Agreement_14_Elm_Street.pdf
- 6 pages · signed on page 6 · initials on pages 1 to 5
- Your signature image
- • Started from a phone photo (IMG_2231.jpg) of a signature in blue pen
- • Cropped tightly, removed the paper and shadow, kept only the ink
- • Darkened slightly so it prints clearly, saved as a transparent PNG (signature_laura_chen.png) for next time
- Where it was placed
- • Page 6, "Tenant" line: signature, 5 cm wide, sitting on the line
- • Below the line: "Laura Chen" in printed letters and the date 08/10/2026
- • Pages 1 to 5: your initials "LC" in the bottom right box marked "Initials"
- • The landlord's line is left empty for them to sign
- What did not change
- • All text and clauses, the page count and the layout
- • The landlord's form fields are still fillable for their part
- Is an image signature valid?
- • In many countries, a typed or image signature on a PDF is accepted as an electronic signature for everyday agreements like leases and job offers
- • Some documents need a stronger signature: notarized papers, wills, property deeds, or forms that ask for a certified digital signature. Check what the other party or your local rules require
- Before you send it
- • Look at the preview of page 6 and check the date format the landlord expects
- • Keep a copy of the signed PDF for your records
- • Ask your agent to draft a short reply email with the signed file attached
How to do it with todo.is
- Copy the prompt, sign a sheet of paper and take a clear photo of it.
- Send the PDF and the photo with the prompt in todo.is on the Today screen, or to your agent on WhatsApp or Telegram.
- Your agent cleans the signature, places it and shows you a preview.
- Approve it or reply "a bit smaller" or "move it up". Your agent remembers the signature for the next PDF.
Tips for a better result
- Sign with a black pen on plain white paper, in daylight. The cleaner the photo, the crisper the signature.
- Ask your agent to keep the transparent signature PNG. Next time you just say "sign it with my signature".
- If the PDF has signature form fields, your agent fills those so it looks like the sender intended.
- Some documents require a certified digital signature or a wet signature. Check before you rely on an image signature.
add signature to PDF: FAQ
- How do I add my signature to a PDF without printing? Photograph your signature on white paper and send it with the PDF. Your agent removes the background and places it on the signature line.
- Is an image signature on a PDF legally binding? For many everyday agreements, an electronic signature like this is accepted, but rules vary by country and document type. For deeds, wills or notarized documents, check local requirements or ask a lawyer.
- Can I add a date and my name next to the signature? Yes. Ask for your printed name, the date and initials on other pages, and your agent adds them as text.
- Is this the same as a certified digital signature? No. Your agent places a picture of your signature. Certified digital signatures use a certificate from a trust provider and are a separate service.
JavaScript is required to use the todo.is app.