Fill PDF forms
Fill in interactive PDF forms, privately in your browser, and autofill the common fields from a profile you save once on your device.
How to fill a PDF form
- 1
Open your form
Drop or select a PDF that has form fields.
- 2
Fill or autofill
Type into each field, or click Autofill to fill the ones that match your saved profile, then review.
- 3
Save and download
Export the filled PDF, optionally flattened, on your device.
Why fill PDF forms in your browser?
Forms often ask for names, addresses and account details. Filling them locally means that information is written into the PDF on your device, not uploaded to a form service.
Frequently asked questions
Is my form uploaded?+
No. Detecting and filling fields happens entirely in your browser, so the form never leaves your device. A live network meter shows zero bytes sent.
Can I autofill a form from my details?+
Yes. Save your details once (name, email, phone, address, and so on) in the profile on the tool, then click Autofill on any form. It matches each field by its label and name and fills the ones it recognises, so you do not retype the same information on every PDF. It fills text fields and dropdowns; read-only, signature, checkbox and radio fields are left for you, and any field it cannot confidently match stays blank. You review and edit everything before saving.
Where is my saved profile kept, and can I delete it?+
Only in this browser, in its local storage. It is never uploaded and is not shared with any other site. You can wipe it any time with "Clear profile from this browser" on the tool.
Does autofill use AI?+
No. It is deterministic pattern-matching against your saved profile, so it runs instantly on every device, including phones, with no model download.
What if my PDF has no fields?+
If there are no interactive fields, use the Edit PDF tool to add text on top instead.
What does flatten do?+
Flattening bakes in your values so the result can be viewed everywhere and no longer edited.
Is it free?+
Yes, with no sign-up.
Common uses
Task-specific guides for the situations people reach for this tool for.