Flatten PDF Online Free

Convert interactive form fields and annotations into static, non-editable content.

Drop files here or click to upload

Max 100 MB

Flatten PDF form fields and annotations online free, converting interactive elements into static content that cannot be edited. All processing happens in your browser.

Last reviewed: July 2026

How to use this tool

  1. 1Upload a PDF file to scan for interactive elements.
  2. 2Review the detected form fields and annotation types.
  3. 3Select which element types to flatten (forms, annotations, or both).
  4. 4Click Flatten to process and download the static PDF.

Common use cases

  • Lock filled form data before sending a completed application.
  • Prepare a signed document for archival by making annotations permanent.
  • Remove interactive elements before printing to avoid rendering issues.

Technical notes

  • Form fields are flattened using the PDF form flatten operation, preserving visible values.
  • Text annotations are rendered at their original position, size, and color.
  • Highlight and underline annotations are converted to colored rectangles or lines.

Private by design

This tool runs in your browser. Your file is not uploaded to our server while using the tool.

Limitations

  • Flattening is irreversible — always keep a backup of the original PDF.
  • Custom fonts in text annotations may be substituted with a standard font.
  • Encrypted PDFs must be decrypted before flattening.

Frequently Asked Questions

What does flatten mean for a PDF?

Flattening converts interactive elements like form fields and annotations into static, non-editable content baked into the page.

Can I choose which elements to flatten?

Yes. After scanning, you can select specific types — form fields, text annotations, highlights, or links.

Can I undo flattening?

No. Flattening is permanent. Always keep a copy of the original PDF before processing.

Will form values be preserved?

Yes. The current field values are rendered as static text in the flattened PDF.

Are my files uploaded to a server?

No. All processing happens in your browser. Your PDF never leaves your device.

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