Sign many PDFs without opening them one at a time.
If you sign a lot of similar PDFs — contracts, invoices, payslips, minutes — you usually open them one by one, place the signature, export, repeat. Fdo. does it in one pass: load every PDF, configure the signature once, download them signed.
Fdo. embeds a hand-drawn signature image into the PDF — that's simple e-signature under eIDAS, not qualified.
Nobody can read your PDFs. Not even us.
This is the important part. Your files never leave your device: they are not uploaded to any server, do not pass through the cloud, are not logged anywhere. Even we could not read them if we wanted to, because they never reach anywhere we can see.
The page you are reading is static. All the signing work is done by your own browser, with code that runs on your computer. When you download the signed PDF, you download it from your device's memory, not from the internet.
You can disconnect from the network after the app loads and still sign your PDFs. That is the simplest proof that nothing is being sent anywhere.
How it works
- Load the PDFs. Drag them into the browser or pick them from disk. One or a hundred — same flow.
- Set up the signature once. Upload a signature image or draw it with the mouse. Decide which page and where it should appear.
- Download everything signed. Each PDF is processed on your device and downloaded already signed, as a ZIP or one by one.
Use cases
People who sign a lot of similar PDFs usually end up looking for this.
- Accountants
Sign batches of client documents in a single sitting instead of one by one.
- Lawyers
Sign contracts and filings spread across several case files.
- Human resources
Sign payslips and employment contracts each month without opening each file.
- Property managers
Sign meeting minutes and notices for every building you manage.
- Freelancers
Sign invoices and quotes without launching a separate viewer for each one.