Flatten PDF
Merge fillable form fields, annotations, and layers into an uneditable, secure PDF.
Crop PDF
Supports PDFs · 20 MB limit per file
About Flatten PDF
Lock and secure your PDF forms and annotations by flattening all active interactive fields into a permanent, non-editable document layer.
Key Features & Benefits
- Locks interactive form fields and signatures permanently
- Prevents unauthorized field modifications
- Optimizes document rendering across all PDF viewers
- 100% In-memory processing
How to Use Flatten PDF
- 1
Upload your interactive PDF or filled form.
- 2
Click "Flatten PDF" to merge all interactive layers.
- 3
Download your finalized, locked PDF.
Frequently Asked Questions
Helpful Guides & Tutorials
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