Are my files uploaded?

No. Flattening runs entirely in your browser. Your PDFs never leave your device.

What does flattening do?

Each page is rendered as an image and saved in a new PDF. Form fields, annotations, and interactive elements become static content and can no longer be edited or filled out.

Can I flatten multiple PDFs?

Yes. Add multiple files; they will be flattened and delivered as a single ZIP.

Yes. All processing is client-side.

Flatten PDF Online Free

Make form fields and annotations non-editable. All processing happens in your browser. No uploads, no signup—your files never leave your device.

How to use

Upload PDF(s)

Select one or more PDFs to flatten. Form fields and annotations will be converted to static content. Processing is done locally in your browser.

Flatten

Click “Flatten PDF(s)”. Each page is rasterized so forms and annotations are no longer editable. Multiple files are bundled into a ZIP.

Download

Download the flattened PDF or ZIP. Content will look the same but forms and comments cannot be edited.

Frequently asked questions

Rasterize PDF
Convert PDF to image-based PDF. Flatten layers and remove selectable text.
Sanitize PDF
Remove metadata, annotations, scripts, and more.
Digital Signature PDF
Add a cryptographic digital signature to your PDF using X.509 certificates. Supports PKCS#12 (.pfx, .p12) and PEM formats. Your private key never leaves your browser.