The private pdfFiller alternative
Fill and sign without handing the document to a cloud account.
pdfFiller, owned by airSlate, is a cloud document platform: you make an account, your documents live in its storage, and you start on a 30-day free trial. That suits teams routing paperwork through a shared workspace. It is a lot of account for someone who needs to fill in one form and sign it.
No account, no trial clock
Our in-browser tools open and work. There is no 30-day countdown and no card to remember to cancel.
The document does not move
pdfFiller stores your documents in its cloud by design. Ours are opened and rebuilt in the browser and never uploaded.
Sign and fill for free
Sign PDF, fill forms, annotate and flatten are all in the free set — the exact jobs people reach for pdfFiller to do once.
| Feature | DiemDeskFree during launch | pdfFiller |
|---|---|---|
| Account required | No, for most tools | Yes |
| Free to use | Every in-browser tool, no daily cap | 30-day free trial, then paid |
| Documents stored in their cloud | Yes, by design | |
| Files stay on your device | ||
| Fill and sign a PDF | ||
| Team routing, audit trails, bulk send | ||
| Works offline |
pdfFiller figures are from their published plans as of July 2026 and may change — verify at the source. See the full comparison for more names.
Fair disclosure: DiemDesk is in pre-launch. Annotate, Redact and OCR are marked coming soon, and the Pro plan isn’t on sale yet — so everything is free right now. We’d rather show the full roadmap than hide it.
Switching from pdfFiller — your questions
Is there a free pdfFiller alternative?
This is one. pdfFiller runs a 30-day free trial and then charges; our in-browser tools — including fill, sign, annotate and flatten — are free with no daily cap and no account for most of them.
What does pdfFiller do that DiemDesk does not?
Workflow. It is built for teams sending documents out for signature and tracking what came back, with audit trails and bulk sending. We do not do that, and are not pretending to. If you need a signature request sent to someone else, pdfFiller is the right shape of product.
Where do my files go?
Nowhere. The in-browser tools do the work on your device, so the filled and signed PDF is saved straight back to your downloads. There is no copy in an account for you to remember to delete later.
Give it a try — nothing to install
No signup, no upload, no watermark. Drop in a file and watch it work entirely in your browser.
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