PDF Flatten

Summary

Upload a PDF with fillable form fields or annotations and download a flattened version where all content is permanently baked into the page.

How it works

1. Click the upload area or drag a PDF file onto it.
2. The tool reads the file in your browser — nothing is sent to a server.
3. Click "Flatten & Download" to process the PDF.
4. pdf-lib redraws each form field and annotation as static page content.
5. The original form widgets and editable fields are removed.
6. Download the flattened PDF — it can no longer be filled or edited.

Use cases

• Locking a completed contract before archiving.
• Preventing recipients from modifying a filled application form.
• Preparing PDFs for printing so field borders and values always appear.
• Converting interactive forms to static documents for long-term storage.
• Stripping annotations before sharing a reviewed draft externally.
• Ensuring consistent rendering across PDF viewers that handle forms differently.

Frequently Asked Questions