Fill PDF Forms

Detect and fill interactive PDF form fields locally, then optionally flatten.

Category: Edit

Processing: On-device

Quota bucket: Core

Open interactive tool: /tools/fill-form

How to use Fill PDF Forms

Upload a PDF that contains interactive form fields such as text boxes, checkboxes, or dropdowns.
Click Load form fields to detect and display all fillable fields in the document.
Enter values for each detected field using the appropriate input controls.
Optionally enable Flatten to lock field values permanently and remove editability.
Click Fill and download to generate the completed PDF.

Use the flatten option when sharing completed forms to prevent recipients from editing your entries.
Leave fields blank if you want to preserve their current values from the original PDF.
Radio and dropdown fields show all available options detected from the form structure.

Privacy: Your files never leave your browser. All processing runs on-device. Full privacy model

What does Fill PDF Forms change?

It detects interactive PDF form fields and lets you fill them with text, checkbox, dropdown, or radio values.

Is Fill PDF Forms private by default?

Form analysis and filling run entirely in your browser. No form data is transmitted.

What does Fill PDF Forms not protect?

It supports standard AcroForm fields. XFA forms and heavily customized field widgets may not be recognized.

XFA-based forms (common in older government PDFs) may not be detected by the field analyzer.
Some complex form layouts with nested field groups may display field names that look unfamiliar.