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Merge form fields, annotations, and layers into the page content.
Your file stays private. All processing happens locally in your browser using pdf-lib — no uploads, no servers. Flatten your PDF to make form fields and annotations permanent, then download instantly.
Flatten a PDF to merge form fields, annotations, comments, and layers into the page content. Once flattened, the content becomes permanent and cannot be edited. This is useful for finalizing filled forms, locking annotations, or preparing documents for printing.
All processing happens in your browser using pdf-lib — no uploads, no servers, complete privacy. Upload your PDF and download the flattened version instantly.
Keywords: flatten PDF online free, merge layers in PDF, flatten form fields, make PDF permanent, flatten annotations.