Sign an email attachment and reply from your phone
The classic situation: an email with 'please sign and return' arrives while you're out. Save the attachment, sign it here and reply with the signed PDF — without touching a laptop.
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From attachment to reply
Under two minutes.
Save the attachment
Tap the PDF in the email and save it to Files or Downloads.
Sign it here
Open it in this page, sign with your finger and download.
Reply with it attached
Back in your mail app, reply and attach the signed PDF.
Handy on the go
Works offline-ish
Once the page is loaded, signing happens on your phone.
Rename before sending
The file gets '-signed' added, so it's easy to find.
Keep a copy
The signed PDF stays in your Files app.
iPhone: where's my download?
On iPhone, downloads land in the Files app under Downloads. When replying in Mail or Gmail, choose 'Attach file' and pick it from there.
Questions
Can I sign a Word document?+
Save or export it as PDF first, then sign here.
Does the sender need anything?+
No — they just receive a normal signed PDF.
What does it cost?+
Free to try. Downloading your signed PDF costs €2.99 a month or €24.99 a year, and you can cancel anytime.