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How to Flatten a PDF Online (Free)
Filled out a PDF form and want to make sure nobody changes your answers? Flattening burns the form fields into the page as permanent content. PdfWord's free Flatten PDF tool does it in seconds, entirely in your browser — no signup, no watermark.
Steps
- Open the Flatten PDF tool — Go to the Flatten PDF page and drop in your filled PDF.
- Click Flatten PDF — All form fields become locked page content on your device.
- Download — Share a tamper-proof document. Free forever.
Use the Free Flatten PDF Tool →
Frequently Asked Questions
What does flattening do?
It turns interactive form fields into static page content — values stay visible but can't be edited.
Can I undo it?
No — flattening is permanent. Keep a copy of the original fillable PDF if you might need to edit later.
Is it free and private?
Yes — free, no signup, and your file never leaves your browser.