Flatten PDF

Flatten fields, annotations, layers, and transparency where supported.

AI summary: Flatten PDF Online accepts PDF and outputs PDF. Flatten fields, annotations, layers, and transparency where supported. Uploads and generated files stay outside the public web root and are encrypted at rest where stored.
Flattening can make interactive fields and comments non-editable.
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The upload form is available only after you log in and verify your email. This keeps PDF processing tied to an account, plan limits, encrypted storage, and secure job history.