What the tool changes
Renders each page with annotations into a new image-backed PDF at increased resolution.
Flatten PDF
Flatten a PDF into fixed page appearances. See exactly what changes, what to check afterward, and how long the private result stays available (6 hours).
◈ Encrypted transfer◷ Short retention⊘ No watermark◎ Works on every device
Flatten PDF: the short answer
Flatten a PDF into fixed page appearances. Renders each page with annotations into a new image-backed PDF at increased resolution.
What to know before you use Flatten PDF
Flatten PDF can affect quality, metadata, compatibility, or structure. The notes below show what to check in plain language.
What can go wrong
Searchable text, semantic tags, editable forms, vectors, and signatures are flattened into page pixels.
How to verify the result
Zoom into text, test printing, and confirm that losing search and accessibility structure is acceptable.
A three-step Flatten PDF checklist
- Before: Keep the source file and open it once to confirm that it is not damaged.
- During: Review every setting shown for Flatten PDF instead of accepting a value you do not understand.
- After: Before deleting the source file, open the result and confirm it holds up against everything covered above.
Flatten PDF tip: Compare file size with how the document actually reads. A smaller PDF is only useful if the text, layout, and images still hold up.
Before using Flatten PDF for important work, browse all file tools, read the file-format guide, or review how temporary uploads are protected.
How long the result stays available
Your Flatten PDF result is stored for 6 hours unless you sign in and save it to your private library.
Flatten PDF questions
Is my original file changed by Flatten PDF?
No. Flatten PDF creates a distinct output file; the source you uploaded is never modified.
What can go wrong when using Flatten PDF?
Searchable text, semantic tags, editable forms, vectors, and signatures are flattened into page pixels.