📄100% Client-Side · Zero Server Uploads
Flatten PDF
Lock interactive form fields, checkboxes, and annotations into permanent, non-editable PDF pages.
or drag & drop your files directly here
Files are processed locally in your browser and never uploaded to any server.
How to use Flatten PDF
Follow these simple steps to process your files in seconds.
Upload fillable PDF
Select a PDF containing interactive form fields, checkboxes, dropdowns, or annotations.
Flatten layers
All interactive form fields are merged permanently into the static page content.
Download locked PDF
Click "Flatten PDF" to save a clean, non-editable copy ready for official submission.
Frequently Asked Questions
Why should I flatten a PDF before submitting it?
Flattening locks in your typed form answers and checkboxes so recipients cannot accidentally edit them, and ensures government or bank portals display your filled values properly.
Does flattening upload my form data anywhere?
No. Your form is flattened 100% locally in your browser.