Fill PDF Form — free, private how-to guide
Fill in the fields of a PDF form entirely in your browser. Upload an interactive (AcroForm) PDF, complete its fields, and optionally flatten it so the values are locked. Nothing is uploaded.
Updated
Step by step
Select your PDF form
Drop or pick an interactive PDF. It is read locally — never uploaded.
Fill the fields
Complete the text fields, checkboxes and dropdowns the form contains.
Flatten & download
Optionally lock the fields, then save your completed PDF.
Open Fill PDF FormCommon use cases
- Complete an official application form
- Fill a contract template's fields
- Lock a finished form so fields can't be changed
Frequently asked questions
What kind of PDF works?
PDFs with interactive form fields (AcroForm). If the tool says there are no fields, the document is a flat PDF without fillable fields.
Is my data uploaded?
No. The form is read and filled entirely in your browser — nothing leaves your device.
What does flatten do?
Flattening bakes your answers into the page so the fields can no longer be edited — useful before sending a final copy.