Free PDF Flattener

Flattening a PDF converts all interactive elements (form fields, annotations, comments, layers) into static, non-editable content. This merges everything into a single layer, making the document appear exactly as it looks but removing any ability to edit or interact with form fields and annotations.

Yes! All PDF processing happens directly in your browser using client-side technology. Your files never leave your device or get uploaded to any server, ensuring complete privacy and security of your documents.

Our free PDF flattener supports files up to 50MB in size. This is sufficient for most documents. If you need to process larger files, you may need to compress your PDF first or split it into smaller sections.

No, password-protected or encrypted PDFs cannot be flattened using our tool. You'll need to remove the password protection first before flattening. Most PDF readers allow you to save an unprotected copy if you have the password.

Not necessarily. Flattening focuses on converting interactive elements to static content rather than reducing file size. In some cases, the file size may actually increase slightly as form fields and annotations are rendered as permanent content. For file size reduction, use a PDF compression tool.

All form fields become permanent text or graphics after flattening. Any data entered in the fields will be preserved and visible, but the fields will no longer be editable or interactive. Checkboxes, radio buttons, and dropdown menus are converted to their visual representation.