Flatten PDF
Flatten interactive PDF elements entirely in your browser. Converts fillable form fields, annotations, and comments into static, non-editable page content. Useful for locking form data, preparing documents for archival, or fixing rendering issues. Renders each page at high resolution and embeds the result back into a clean PDF. No server uploads, no registration — your documents never leave your device.
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Flatten PDF
Upload a PDF to flatten form fields, annotations, and comments into static, non-editable page content.
How to Flatten a PDF
Lock form fields and annotations into static content — no signup required.
Upload your PDF
Drag and drop a PDF onto the upload area, or click to browse your device.
Review file info
Confirm the file name and page count. The tool will flatten all pages automatically.
Flatten
Click 'Flatten PDF' to render and embed all interactive elements as static content.
Download
Download the flattened PDF instantly. The original file is not modified.
Why Flatten a PDF?
Flattening is essential when you need to lock down a document. Filled-out forms, signed contracts, and annotated reports should be flattened before sharing to prevent further edits.
Some PDF viewers render interactive elements inconsistently — form fields may shift, annotations may disappear, or fonts may substitute. Flattening eliminates these issues by converting everything to static page content.
Our tool renders each page at 2× resolution using pdf.js, then embeds the result as a high-quality image in a new PDF. Everything runs entirely in your browser — no server uploads, no registration.
Frequently Asked Questions
Are my files uploaded to any server?
No. All processing happens entirely in your browser. Your documents are never uploaded or stored anywhere — they stay on your device.
What does 'flatten' mean?
Flattening converts interactive PDF elements — form fields, annotations, comments — into static, non-editable page content. The visual appearance is preserved, but the elements can no longer be edited.
Why would I flatten a PDF?
Common reasons include: locking form data so it can't be changed, preparing documents for archival, fixing rendering issues in certain viewers, and ensuring consistent appearance across all PDF readers.
Does flattening affect quality?
Pages are rendered at 2× resolution and saved as high-quality JPEG images. For most documents the result looks identical to the original. Very fine text may show minimal compression artifacts.
Will the file size change?
It depends on the document. Text-heavy PDFs may increase in size since text is converted to images. PDFs with lots of images may stay similar or decrease slightly.
Is there a page or file size limit?
No hard limit. Processing runs in your browser, so the practical limit depends on your device's available memory. Files with hundreds of pages typically work fine.
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