Flatten a PDF to permanently embed annotations, comments, filled form fields and signatures. The result is a static, non-editable document, ideal for archiving and final sharing. Browser-side processing, no server upload.
Drag the PDF to flatten here
or drag the file here
or open the full PDF editor for annotations, signatures and much more.
Upload the PDF with annotations, form fields or signatures to flatten.
Click "Flatten": annotations and fields are made permanent and no longer editable.
The flattened PDF is downloaded: a static document with no interactive layers.
Everything runs in the browser via WebAssembly. Your PDF is never sent to any server.
No upload, no queue. Processing is local and completes in seconds even for large files.
No required account, no credit card, no watermark. Truly free.
PC, Mac, iPhone, Android — just a modern browser. Safari, Chrome, Firefox or Edge.
Flattening a PDF permanently embeds all annotations, filled form fields, signatures and comments into the fixed content of the document. After flattening, these elements can no longer be modified or removed.
This operation is useful before sending a final PDF to third parties (to prevent modifications to signatures or fields), to reduce file complexity, or to resolve compatibility issues with PDF viewers that do not support certain types of annotations.
Flattening happens in the browser via pdf-lib, without transmitting the file to external servers.
Flattening a PDF means merging all interactive layers (annotations, form fields, signatures) into the fixed page content, making them permanent and non-editable.
To ensure annotations and form field values are visible in all PDF viewers, even those that do not support interactive layers. Also useful for locking a signed document before sending.
No. Flattening is an irreversible operation. We recommend keeping a copy of the original before proceeding.
No. Flattening happens in the browser via pdf-lib. The file never leaves your device.
Yes. Signatures are embedded as images in the flattened document.
Free, in the browser, nothing to install. Upload your PDF and go.
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