Flatten PDF
Lock form fields and annotations. Deep mode rasterizes every page so the content is completely uneditable.
Drop a PDF here
or click to browse
About this tool
Flatten a Fillable PDF
Bake filled-in form fields into the page so they can no longer be edited.
Perfect for finalizing completed or signed forms before sharing.
Make a PDF Read-Only
Prevent further edits to form fields by flattening your PDF.
A quick way to lock down a document before distributing it.
Flatten a PDF Form
Bake filled-in form fields into the page so they can no longer be edited.
Perfect for finalizing completed applications, contracts, or signed forms.
Frequently asked questions
What does flattening do?
It merges interactive fields and annotations into the static page content, making them read-only.
Is it private?
Everything runs locally in your browser using WebAssembly. Because no data is uploaded to a cloud server, your files remain strictly private, and the entire process generates zero server carbon emissions, making it highly eco-friendly.
Does this encrypt the file?
No - flattening locks form fields. To add a password, use the Protect PDF tool.
How do I flatten a PDF?
Open the tool, drop your file, adjust any settings, and click the action button. The result downloads to your device instantly.
Do I need to create an account?
No - KuroPDF is completely free with no sign-up required.
Are my files uploaded?
Everything runs locally in your browser using WebAssembly. Because no data is uploaded to a cloud server, your files remain strictly private, and the entire process generates zero server carbon emissions, making it highly eco-friendly.