Flatten PDF
Flatten PDF forms and annotations so they cannot be edited. Free, no upload — all processing in your browser.
Your files never leave your device. All processing happens in your browser. We don't upload, store, or access your files.
Drop your PDF here or click to browse
PDF files — no size limit
How to Use
- 1Drop your PDF file into the upload area or click to browse
- 2The tool detects form fields and annotations automatically
- 3Click "Flatten PDF" to convert all interactive elements to static content
- 4Download the flattened PDF — fields can no longer be edited
Need more detail? Read our complete guide.
About This Tool
Flatten interactive form fields and annotations in your PDF into static content. Once flattened, form values and annotations become permanent parts of the page and cannot be changed by the recipient. Perfect for finalizing filled forms before sharing. All processing happens in your browser — your file never leaves your device.
Frequently Asked Questions
What does flattening a PDF mean?
Flattening converts interactive elements like form fields, checkboxes, and annotations into static page content. The visual appearance stays the same, but the fields can no longer be edited or modified by anyone who opens the document.
Why would I flatten a PDF?
Flattening is useful when you want to share a completed form and ensure the recipient cannot change the values you entered. It is also helpful for reducing file size and ensuring the document displays consistently across all PDF readers.
Can I unflatten a PDF?
No. Flattening is permanent — the form fields and annotations are merged into the page content. Always keep a copy of the original editable PDF before flattening.
Does flattening change how the PDF looks?
No. The visual appearance remains identical. Text you typed into form fields, checkboxes you checked, and annotations you added all stay exactly where they are — they just become part of the static page content.