The signup wall is a symptom of how the tool is built
Most online PDF tools do the work on their own servers. Your file gets uploaded, processed somewhere in a data centre, and sent back. That approach is completely normal, and it has real costs attached: storage, processing time, bandwidth, and someone paying for all three. An account is how those costs get managed. It gives them a way to meter usage, cap the free tier, and stop one person running a thousand files through it.
So the signup form isn't really about you. It's downstream of a decision made long before you arrived, about where the work happens. Change that decision and the reason for the account disappears with it. PDkef signs your PDF inside your browser tab, using your own device. Nothing is uploaded, so there's nothing to meter, no storage to pay for, and no reason to know who you are before you can start.
How to judge a PDF site before you hand it a document
Signing a PDF often means handing over something you'd rather not scatter around: a passport page, a payslip, a child's consent form. These are the questions worth asking of any tool, this one included.
- 1Does it upload your file? An upload progress bar is the giveaway. So is a wait that scales with file size. Work done in your browser is instant on a small file regardless of your connection.
- 2Does it work offline? Turn off your wifi and try. It's a one-second test that no amount of marketing copy can talk its way around, and it's the one we'd point at ourselves.
- 3If it does upload, what happens next? A site processing files on a server should say plainly how long it keeps them and who can reach them. Vagueness here is itself an answer.
- 4Is the email step doing anything? Being asked for an address to receive a file you just provided is a marketing step wearing a technical costume.
- 5Can you check the claims? Open source means the privacy promise is inspectable rather than just stated. It's not a guarantee on its own, but it changes what kind of promise it is.
None of this is an argument that server-based tools are bad. Plenty are run carefully by people who take it seriously. It's just that for something as ordinary as adding your name to a form, there's no reason the document needs to travel at all.
Two different things are called "signing a PDF"
Nearly everyone searching for this wants an electronic signature: your signature, visibly on the page, so you can send the form back. That's what this tool makes, and it's what schools, landlords, clinics and employers are asking for when they say "sign and return".
A digital signature is a different, more specialised thing: a cryptographic certificate embedded in the file that proves who signed it and that nothing has changed since. Some formal filings and regulated industries require one. PDkef doesn't produce those, and any tool claiming to do it for free without knowing your identity is worth a second look, because issuing that certificate is the entire cost.
If your document mentions a digital certificate or a qualified signature, you need the second kind and should ask whoever sent it what they accept. Otherwise, the first kind is what they're expecting.
Sign a PDF right now, no signup required
- 1Open the Sign & Fill tool and choose or drag in your PDF. There's no login screen in the way.
- 2Draw, type, or upload your signature, and fill in any text fields or checkboxes the form needs while you're there.
- 3Download the signed PDF. That's the whole process, and it's the same process every time after this one.