Flatten PDF Online
Convert interactive form fields and annotations into static content. Makes the PDF non-editable and reduces file size.
Drop your file here, or
PDF files up to 50 MB
Features
Form Field Flattening
Converts all fillable form fields (text inputs, checkboxes, dropdowns) into static text.
Annotation Flattening
Burns annotations, comments, and markup into the page content permanently.
Reduced File Size
Removing interactive elements often reduces the overall file size.
Tamper Prevention
Flattened PDFs can't be edited — perfect for final submissions and records.
How to Flatten PDF Online
Upload Your PDF
Select the PDF with forms or annotations to flatten.
Server Processing
Our server flattens all interactive elements into static content.
Download Flattened PDF
Get your static, non-editable PDF.
Why use PDFTriX Flatten PDF?
PDFTriX Flatten creates tamper-proof PDFs by permanently embedding all interactive elements into the page content.
Frequently Asked Questions
What's the difference between flatten and remove annotations?+
Flatten burns annotations INTO the page (they become part of the image). Remove annotations deletes them entirely.
Can a flattened PDF be un-flattened?+
No. Flattening is permanent. Keep a copy of your original if you may need to edit later.