How to use Flatten PDF
Open the Flatten PDF tool, drop your file into the upload area, choose any settings that match your output needs, and start the browser-side processor. For live tools, the file is read with the File API and transformed locally.
The progress bar shows each stage while the page packages your PDF result. When processing completes, the download starts automatically.
Privacy
Because the workflow is browser-only, your original document is not sent to PlumFile servers. Refreshing or closing the tab clears the working file from memory.
FAQ
Is Flatten PDF free?
Yes. Flatten PDF is available as a free browser tool with no signup requirement and no watermark on the output.
Are my files uploaded?
Live processors run in the browser. Your file is read locally, processed on your device, and not posted to a conversion server.
What file size is supported?
The free tier is designed around files up to 100MB.