---
title: "Make a PDF fillable with CommonForms | Docs Bunny"
description: "Detect text boxes, checkboxes and signature lines locally with CommonForms, fill them on the page, and save an updated PDF."
canonical: https://docsbunny.com/make-pdf-fillable
---

# Make a PDF fillable with CommonForms

Detect text boxes, checkboxes and signature lines locally with CommonForms, fill them on the page, and save an updated PDF.

- Input: PDF
- Output: fillable PDF form
- Browser tool: [Open Make a PDF fillable with CommonForms](https://docsbunny.com/make-pdf-fillable)
- Privacy: Supported processing runs locally after the person selects a file.

## Convert a printed PDF into a fillable form

Docs Bunny runs the open CommonForms FFDNet-S model in your browser. Detected fields stay on the page so you can type, check and sign, then download a fillable or flattened PDF without uploading the document.

## Steps

1. **Open the PDF** — Choose a printed or existing form. Your file stays in the browser.
2. **Detect or add fields** — Run CommonForms to find fields, or place text, checkbox and signature fields by hand.
3. **Fill and save** — Complete the form on the page, then download a fillable PDF or a flattened copy.

## Common questions

### Is the PDF uploaded for field detection?

No. CommonForms FFDNet-S runs locally after the model is downloaded once and cached. Page pixels never leave your browser.

### What fields can CommonForms detect?

Text boxes, choice buttons (checkboxes) and signature lines, matching the CommonForms dataset classes.

### Can I fill a PDF that already has form fields?

Yes. Existing AcroForm fields are loaded immediately so you can update them and save a new PDF.

### Is this a cryptographic digital signature?

No. Signature fields accept a typed or drawn visual signature, not a certificate-backed digital signature.