Fill PDF
Fill out interactive AcroForm PDF forms, checkboxes, radio buttons, and dropdowns.
Your PDF is processed locally in your browser.
PDFSimplify processes documents on your device using client-side WebAssembly and Web Workers. No document data is transmitted to our servers or external cloud services during processing.
Drop your PDF form here to fill
Detects interactive text fields, checkboxes, and dropdowns directly on your device
No file size limit imposed by server • Processed locally in your browserHow Fill PDF Works in Your Browser
Inspects the internal PDF AcroForm dictionary using pdf-lib, renders interactive form controls for each detected field, and updates the PDF object stream.
Why client-side processing is more private:
Unlike conventional online converters, your documents never traverse external networks to third-party processing servers. Everything happens inside your local machine’s memory.
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 Features
Helpful Tips
- •Check the "Flatten form" option if sending to recipients who should not modify your answers.
Troubleshooting & Notes
- •Flat or scanned PDFs without native AcroForm fields can be annotated in our PDF Editor instead.
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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