Fill Freely

Fill Freely is a free browser tool for adding text, checkmarks, dates, initials, and signature appearances to PDFs.

Live site: https://fillfreely.com/

Use Fill Freely for PDF forms, text marks, checkmarks, dates, initials, and signature appearances. Use PDF Freely when you need to merge, split, rotate, reorder, or watermark PDF pages.

Features

• Load a PDF locally in the browser with no upload step.
• Detect and edit common PDF form fields.
• Add freeform text, checkmarks, dates, initials, and visual signatures.
• Move, edit, resize, and delete placed marks.
• Preserve editable form fields by default, with optional flattening on export.
• Download the filled PDF locally.

Run Locally

This is a static site. It can be opened directly from disk:

file:///path/to/fillfreely.com/index.html

Or served from this directory:

python3 -m http.server 4177

Then open http://localhost:4177.

Limits

• Visual signatures are image marks, not cryptographic digital signatures.
• Redaction is intentionally not included because fake redaction can leave underlying PDF content extractable.
• Encrypted PDFs that require a password are not supported yet.
• Large PDFs are limited by browser memory.
• Unusual PDF form fields may need to be filled with freeform marks instead.

Vendor Libraries

• pdf-lib 1.17.1, MIT license, https://pdf-lib.js.org/
• PDF.js 3.11.174, Apache-2.0 license, https://mozilla.github.io/pdf.js/

License

CC0-1.0. See LICENSE.