Flatten PDF
Drop your PDF here
or click to browse your files · Max file size: 1 GB per PDF
Max file size: 1 GB per PDF
Every fillable field, checkbox, comment, and annotation gets merged directly into the page's own content — nothing can be edited, removed, or tampered with afterward.
Flatten PDF
Every fillable field, checkbox, comment, and annotation gets merged directly into the page's own content — nothing can be edited, removed, or tampered with afterward.
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How flattening a PDF works
Three steps, no software to install.
Upload your PDF
We flatten every layer
Export and download
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Frequently asked questions
Everything worth knowing before you flatten a file.
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What does flattening a PDF actually do?
It merges interactive elements — filled-in form fields, checkboxes, comments, and other annotations — directly into the page's own content, so they're no longer separate, editable objects.
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Will I lose any visible content?
No. Flattening never removes or hides anything you can already see — everything stays exactly as it looks, it just stops being editable.
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Can I undo flattening later?
No — once form fields and annotations are merged into the page content, that's permanent. Keep your original file if you might need to edit those fields again in the future.
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Is my file kept after flattening it?
No. Your file is processed only to create the flattened version, then deleted from our servers right away. Max file size: 1 GB.
Handled with real security practices
A few specifics, not boilerplate claims.
Real format verification
We check the actual bytes of every upload — not just its name — before touching it.
No file retention
No. Your file is processed only to create the flattened version, then deleted from our servers right away. Max file size: 1 GB.
Abuse protection
Every upload is size-checked, and abusive IP addresses can be blocked instantly.