Fill PDF Forms
Complete interactive PDF forms directly in your browser. The tool auto-detects every AcroForm field in your document — text boxes, checkboxes, dropdown menus, and radio buttons — presenting them in an easy-to-use interface. Fill out forms, save your progress, and download the completed document ready for submission.
What does this tool do?
The Form Fill tool enables completion of interactive AcroForm PDFs without specialized software. It scans the uploaded PDF to identify all form fields and presents them with appropriate input controls. Text fields accept typed input, checkboxes toggle on/off, dropdown menus show available options, and radio buttons allow single selection from groups. The filled values are embedded into the PDF's form data, creating a completed form that displays correctly in any PDF viewer.
How it works
Using MuPDF's AcroForm handling, the tool parses the PDF's interactive form dictionary to identify field locations, types, and properties. It renders a form interface mapping to these underlying PDF fields. As you fill fields, values are validated against field constraints (maximum length, format requirements). When you save, the tool writes the filled values back into the PDF's form structure while preserving field properties and appearances. The output is a standard filled PDF compatible with any viewer.
Features
- Auto-detects every AcroForm field on every page
- Supports text fields, checkboxes, dropdown menus, radio buttons
- Read-only fields are preserved and displayed
- Field validation respects PDF constraints
- Filled form saves as a new PDF — original untouched
- Visual field navigation with page thumbnails
- Works with standard government, business, and legal forms
How to use
- 1
Upload the fillable PDF
Drag a PDF with form fields onto the drop zone. The tool detects interactive fields and displays a form interface matching the PDF's structure.
- 2
Fill text fields
Click on text fields and type your input. Tab between fields to navigate quickly. Required fields are typically indicated in the form design.
- 3
Toggle checkboxes and radio buttons
Click checkboxes to toggle them on/off. For radio button groups, click your selection — only one option can be selected per group.
- 4
Select from dropdowns
Click dropdown fields to open the list of options, then select your choice. Dropdowns save space compared to radio buttons for many options.
- 5
Save the filled form
Click Save Filled PDF. The completed form downloads with all your entered values embedded and visible.
Common use cases
Complete government forms
Fill tax forms, permit applications, license renewals, and other government documents that use standard AcroForm fields.
Sign contracts and agreements
Complete business contracts, rental agreements, and service contracts by filling the form fields, then use our Sign tool for signature placement.
Process job applications
Fill employment application forms with personal information, work history, and qualifications for job applications.
Medical and insurance forms
Complete patient intake forms, insurance claims, and medical history questionnaires accurately and legibly.
Tips & best practices
- Tab key navigates between form fields in sequence for rapid data entry
- If a field appears disabled (grayed), it's set as read-only by the form creator and cannot be edited
- Dropdown fields with many options may scroll — look for scroll indicators if you don't see your option
- Save your work periodically when filling long forms to prevent data loss from browser refresh