Flattening a PDF is the process of permanently merging all annotations, form fields, and layers into the page content. Use this tool to do it easily, right in your browser.
Simply upload your PDF file, click the flatten button, and all editable elements will be merged into the pages. All processing happens locally in your browser — no file uploads.
Flattened PDFs are more secure because all form fields and annotations are permanently merged, preventing recipients from changing filled content or viewing edit history.
It merges annotations, form fields, and layers into PDF page content permanently. Once flattened, they cannot be edited.
No. Flattening is irreversible. Keep a backup of the original file.
Absolutely. All processing happens locally in your browser.