Secure & Permanent
Flatten PDF — Make Forms & Signatures Permanent
Flatten PDF files online for free. Lock interactive form fields, checkboxes, and signatures to prevent further editing with DocDesk.
Use Flatten PDF Free 100% Free No sign-up needed Instant processing
How to Flatten PDF in 3 Steps
- 1
Upload PDF
Upload the PDF containing interactive forms or annotations.
- 2
Flatten instantly
DocDesk locks all fields and annotations, burning them into the document.
- 3
Download flattened PDF
Download your permanent, un-editable PDF.
Why Use DocDesk?
- Locks form fields
- Makes signatures permanent
- Prevents unauthorized edits
- Works on all PDFs
- No watermarks
- 100% free & private
Frequently Asked Questions
- What does flattening a PDF mean?
- Flattening a PDF means taking all interactive elements (like form fields, checkboxes, and drawn signatures) and permanently merging them into the background of the document so they can no longer be edited or changed.
- How do I flatten a PDF for free?
- Upload your PDF to DocDesk's Flatten PDF tool and click Flatten. Your interactive fields will be permanently locked.
- Is flattening a PDF secure?
- Yes, flattening is a crucial step when sharing signed contracts or completed forms, as it prevents the recipient from easily altering the information you provided.