How to flatten a PDF
Flatten a PDF to lock its interactive form fields into fixed, non-editable content. Flattening ensures your filled forms look the same everywhere and can’t be changed.
Try Flatten PDF now →Step by step
- 1Open the Flatten PDF tool and upload your PDF.
- 2Click “Flatten PDF”.
- 3Download your flattened, locked-in document.
FAQ
Why would I flatten a PDF?
Flattening makes form answers permanent, stops fields from breaking in other viewers, and keeps your document’s appearance consistent.
Is pdfcdf free to use?
Yes. Every tool on pdfcdf is completely free, with no account, no watermarks, and no limits on how many files you process.
Are my files safe? Do they get uploaded?
Your files never leave your device. Every tool runs entirely in your browser, so your documents are processed locally and are never uploaded to a server or seen by anyone.
Do I need to create an account or sign up?
No. pdfcdf works instantly with no sign-up, no email, and no software to install — just open the tool and go.
Does it work on mobile phones and tablets?
Yes. pdfcdf runs in any modern browser on phones, tablets, Mac, Windows and Linux — nothing to download.
Ready to flatten pdf?
Open Flatten PDF →