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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.
What this tool does
Flatten PDF helps you 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.
What you get
Flatten PDF produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.
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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.