Flatten PDF Online | NivoPDF
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Flatten a PDF to lock design, layers, and form elements
Flattening converts interactive elements (forms, annotations, layers) into static content. This helps preserve the document’s appearance and prevents unwanted edits.
Use it before sharing, printing, or uploading to systems that don’t handle PDF layers or form fields correctly.
After flattening, you can compress the file, protect it with a password, or run OCR if the document is scanned.
FAQ
What does it mean to flatten a PDF?
It turns editable or interactive elements into a non-editable page appearance, so the PDF looks the same everywhere.
Does flattening remove layers and annotations?
It merges visible elements into the page content. Some interactive data may no longer be editable after flattening.
Should I flatten a PDF before signing?
Often yes, especially if the PDF has form fields or layers that could change its rendering on different devices.
Will the file become larger after flattening?
It can, depending on the document. If size increases, compressing the PDF is a good next step.
Can I still edit the PDF after flattening?
Flattening reduces editability. To keep an editable version, save a copy before flattening.
What tools work well after flattening?
Common next steps are compressing, protecting with a password, signing, or OCR for scanned documents.