Fill PDF
Fill out interactive AcroForm PDF forms, checkboxes, radio buttons, and dropdowns.
Drop your PDF form here to fill
Detects interactive text fields, checkboxes, and dropdowns directly on your device
How to Use Fill PDF
Select Form
Upload your interactive PDF form.
Enter Information
Fill in detected text fields, checkboxes, and selections.
Export
Save the filled PDF document.
Key Capabilities
Local Execution
Inspects the internal PDF AcroForm dictionary using pdf-lib, renders interactive form controls for each detected field, and updates the PDF object stream.
- •Check the "Flatten form" option if sending to recipients who should not modify your answers.
- •Flat or scanned PDFs without native AcroForm fields can be annotated in our PDF Editor instead.
AcroForm Interactive Field Inspection & Population
AcroForm Field Inspection
The parser inspects the document catalog for /AcroForm dictionaries, extracting interactive text inputs, checkboxes, radio groups, and dropdown options with their default values.
Interactive In-Browser Population
Fill out form fields through a streamlined, mobile-friendly interface. Values are written directly to field dictionaries in memory, preserving interactive usability for recipients.
Optional Post-Fill Flattening
Choose between leaving form fields interactive or flattening them into permanent page text to lock values before official submission.
- •Works with standard interactive AcroForm PDFs; non-interactive scanned forms can be annotated using the PDF Editor.
- •Populated documents can be saved, re-opened, and modified in any standard PDF reader.
- •All form data stays completely private inside your device memory.
Frequently Asked Questions
What if my PDF does not have interactive fields?↓
If the PDF is a flat scanned document, our tool alerts you and offers a one-click transition to the PDF Editor to place annotations over the lines.
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Sign PDF
Draw or upload a visual signature and place it securely on any PDF page.
Protect PDF
Encrypt your PDF with a password so only authorized viewers can open it.
Flatten PDF
Lock fillable form fields and annotations permanently into page appearance.
Related Guides
How to Fill Out Interactive PDF Forms and Applications in Your Browser
Complete walkthrough on filling interactive PDF text fields, checkboxes, and dropdowns locally in memory without Adobe Acrobat.
How to Flatten a Fillable PDF Form (And Why You Should)
Understand why flattening interactive forms prevents accidental tampering and ensures universal viewer compatibility.
How to Edit a PDF in Your Browser (Annotate, Draw, and Sign)
Add text annotations, draw shapes, highlight passages, and place digital signatures directly on your PDF.