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Permanently embed filled form data so recipients cannot modify field values in your output document.
Convert sticky notes, highlights, stamps, and ink drawings into static content that cannot be deleted.
All uploads use HTTPS encryption. Files are permanently deleted from our server immediately after you download.
GhostScript-powered backend processes most PDFs in seconds. No plugins or desktop software needed.
Flattened PDFs are universally compatible with all PDF viewers and commercial printing workflows.
Fully responsive — flatten PDFs from desktop, tablet, or mobile. No app downloads or platform restrictions.
Flattening a PDF converts all interactive elements — form fields, annotations, comments, digital signatures, and optional content layers — into static, non-editable page content. The visual appearance is preserved exactly, but the underlying interactivity is permanently removed.
Common reasons to flatten a PDF include: locking filled forms before submission, preserving reviewer annotations for archiving, preparing files for commercial printing, and ensuring compatibility with older PDF viewers that don't render AcroForm fields correctly.
Our tool uses a professional-grade GhostScript backend that re-renders every page through its PDF interpreter, naturally collapsing all widget annotations, optional-content groups, and form fields into permanent page content. No quality loss, no watermarks, completely free.
No software. No account. No uploads retained. Done in seconds.
No. Flattening preserves the exact visual appearance. Text, images, highlights, stamps, and filled form values all look identical. Only the interactive nature of those elements is removed.
No — flattening is irreversible. Once form fields and annotations are merged into the page content they cannot be extracted or made interactive again. Always keep a backup of your original.
Yes — 100% free, always. No account, no subscription, no hidden fees.
All files are transferred over HTTPS and stored in a private temporary folder. They are permanently deleted the moment you download your result.
Full Flatten locks everything — form fields, annotations, layers, and signatures. Annotations Only locks comments and markup while keeping form fields editable. Forms Only locks filled form data while leaving annotations separate.
Up to 20 MB per file.