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Flatten PDF
Free PDF flattening tool. Convert interactive PDF forms and annotations into static content to prevent further editing. Lock form fields permanently — all in your browser.
Upload PDF file
Select a PDF with interactive forms or annotations to flatten. This will convert all editable fields to static content.
Drag & drop files or browse
Supports: application/pdf Up to 1 file.
Tip: Flatten your PDF forms after filling them out to prevent recipients from changing the data. This is especially useful for completed applications, contracts, and official documents.
Report a bug
If this tool misbehaves, share a quick summary so we can investigate. We include the tool URL automatically—no need to copy and paste.