How to fill out a PDF form for free online

1 min read·25 July 2026

Filling in a PDF form and sending it back does not have to be a hassle. With PDFrust you do it directly in your browser: upload the form, fill in the fields, and download the completed version. No printing, no scanning needed.

Form fields or flat PDF?

Some PDFs have built-in form fields (interactive PDF). You fill those in by clicking on the fields. Other PDFs are plain documents without fields. In that case, use the text tool to place text at the right position.

Add a signature

Many forms require a signature. Using the signature tool you draw your signature on screen (or upload an image of your signature) and place it on the signature line in the form.

Sign PDF

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Checking checkboxes

Checkboxes in non-interactive PDFs are not easy to tick. A handy trick: use the stamp or watermark tool to place a small tick or cross on the right spot.

Save and send

Download the completed PDF and send it via email. You can also protect the PDF with a password using the protection tool, so the recipient cannot change the content.