Flatten PDF
Make PDF form fields, annotations, and signatures permanent and non-editable — processed entirely in your browser. No upload. No storage. No cost.
Flattening merges interactive elements (form fields, annotations) into the static page content. The result is a "locked" PDF that looks identical but cannot be edited.
Flatten Result
FAQ
Is my PDF uploaded to a server?
No. Everything runs locally in your browser using PDF-lib. Your file never leaves your device.
What does "flattening" mean exactly?
Flattening merges interactive elements like form fields, checkboxes, and annotations permanently into the static page layer. After flattening, the PDF looks exactly the same but cannot be edited or filled in anymore.
Will the visual appearance of the PDF change?
No. The PDF will look identical after flattening. Text field values, checkbox states, and annotation content are all preserved — they just become part of the static page instead of interactive elements.
Can I unflatten a PDF after flattening?
No. Flattening is a one-way process. Once interactive elements are merged into the page, they cannot be separated again. Always keep a copy of the original PDF before flattening.
Can I flatten a password-protected PDF?
No. Password-protected PDFs cannot be processed. Please remove the password protection before flattening.