PDF Flattener
Flatten PDF forms and annotations into static, non-editable content — print-safe and tamper-proof.
- 100% free
- No sign-up
- No limits
- Instant results
What is PDF Flattener?
PDF Flattener is a free online tool that converts interactive PDF form fields and annotations into static, non-editable content.
When you flatten a PDF, text inputs, checkboxes, dropdown menus, and digital signatures become permanent parts of the page — they can no longer be changed. This is essential before printing, archiving, or sharing filled forms. The tool runs entirely in your browser for complete privacy.
How to use PDF Flattener
- 1
Upload your PDF
Click the upload area or drag and drop a PDF with interactive forms or annotations.
- 2
Review form fields
The tool shows how many interactive form fields were detected in your document.
- 3
Flatten
Click the Flatten button or press Ctrl+Enter. All form fields and annotations become static content.
- 4
Download
Download the flattened PDF. Forms are now permanent and cannot be edited.
- 5
Verify
Open the downloaded PDF to confirm that all fields display correctly as static text.
Everything this tool
does for you
- Flattens all interactive form fields to static text
- Converts annotations and comments to permanent content
- Shows form field count before flattening
- Makes PDFs consistent across all viewers
- Prevents unauthorized editing of filled forms
- 100% client-side — files never uploaded
- No file size limits or daily quotas
- Works with complex multi-page forms
Related free tools
Frequently asked questions
This tool fixed one thing.
Now fix the whole site.
Our scanner runs 240+ checks across 10 audit areas, ranks every issue by the score points it costs, and hands you the code to paste.
Run a free audit- Flatten interactive form fields
- Lock annotations and comments
- Makes PDFs print-safe and consistent
- Prevents editing of filled forms
- Files never leave your browser
- No signup or limits