Flatten PDF Free — Make PDF Non-Editable
Make PDFs permanently non-editable — removes form fields, annotations, and interactive scripts.
Drop a PDF file to flatten
Flattening...
About Flatten PDF
Interactive elements in a PDF — form fields, annotations, and scripts — can be edited long after you send the file. ILikePdf Flatten PDF bakes those elements into static page content, producing a non-editable, print-ready document. Flattening also removes hidden layers and interactive metadata that can leak document history. The process preserves the file's appearance exactly while locking it down, and everything runs locally in your browser.
How to flatten a PDF Flatten PDF
Common use cases for Flatten PDF
- Freeze a filled form so nobody can alter the answers.
- Remove interactive fields before publishing a document.
- Prepare files for print providers that require flattened output.
- Eliminate hidden metadata that can leak document history.
Pro tips
- Flattening also strips hidden layers, which improves privacy when sharing.
- The visual appearance is preserved — only interactivity is removed.
- Processing happens locally on your device.
Frequently Asked Questions
Flattening merges all layers, annotations, form fields, and transparent objects into a single flat layer. The visual appearance is unchanged but interactive elements become static.
Flattening is essential before printing (to prevent rendering issues), before submitting forms (to lock filled values), or before archival (to ensure consistent display across all PDF viewers).
Often yes. Removing layered transparency data, annotation metadata, and form field structures can significantly reduce file size while preserving visual fidelity.
No. Flattening is destructive — form fields can no longer be edited, annotations cannot be removed, and layers cannot be separated after flattening. Always keep the original.
Yes. Processing runs entirely in your browser using WebAssembly. Your PDF never leaves your device.