Flatten Annotations
About Annotation Flattening
Flattening permanently merges annotations into the PDF page content. This includes:
- Comments and sticky notes
- Highlights, underlines, and strikethroughs
- Stamps and drawn markups
- Shapes, arrows, and lines
- Free text annotations
Important: Once flattened, annotations can no longer be edited, moved, or deleted.
Tips for Best Results
- Keep a copy of your original PDF with editable annotations
- Flatten before sharing final versions to prevent changes
- Flattening can reduce file size for annotation-heavy documents
- Review all annotations before flattening as the process is permanent
- Use a descriptive output file name to distinguish the flattened version
Frequently Asked Questions
Upload your PDF and the tool merges all annotations permanently into the page content — everything runs in your browser with no installation needed.
Flattening converts interactive annotations like comments, highlights, and stamps into static page content so they can no longer be edited, moved, or deleted.
No, flattening is permanent. Always keep a backup of the original file if you may need to edit annotations in the future.
Processed on ISO 27001-certified UK servers.
Files are encrypted in transit and automatically deleted.
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