Flatten a PDF online to make text, forms and images non-editable — free PDF flattener.
About
Turns every page of any PDF into a flattened, non-editable image, so its text, images and form field values can no longer be selected, extracted or changed.
Businesses use it to lock a completed form or contract before sending it out, so nothing in it can be altered afterward, while archivists use it to make sure a document stays exactly as it looked when it was filed. It works on any PDF — scanned, text-based or filled-in — not just ones with fillable fields. It's one of many free PDF tools on Toolapt, and like every tool here, it's free to use with no sign-up and no limit on how many times you run it.
Examples
3 worked examples
A filled-in rental application with 8 text fields (name, address, phone, email, employer, income, move-in date and signature) flattens to a 1-page PDF with every value still visible and 0 fields left, so nothing can be changed afterwards.
A survey PDF with 9 checkboxes and a comments box flattens to a page image that keeps every tick and the typed comment exactly as answered, ready for long-term storage.
A plain letter with no fillable fields still flattens without an error, since every page is turned into an image — the 1 KB text PDF comes out as a 60 KB image-based PDF.
FAQ
Quick answers to common questions about the Flatten PDF.
It turns every page of a PDF into a flattened, non-editable image, so its text, form fields and formatting can no longer be selected, extracted or edited.
Yes. It's free, with no sign-up, no watermark and no limit on how many files you flatten.
Yes. Your PDF is flattened entirely in your browser using small PDF libraries loaded from this site — it's never uploaded to a server.
They're kept exactly as they appear — flattening renders each page as it looks, form values included, so nothing already entered is lost or changed.
No. Each page is rendered at high resolution so the flattened PDF looks the same as the original — only the underlying text and fields stop being selectable or editable.
No. Once a PDF is flattened, its pages can't be turned back into editable text or fields with this tool — keep the original file if you might need to edit it again later.
Yes. The page is fully responsive and works on mobile, tablet and desktop browsers alike.
Text becomes part of a page image, so it's no longer selectable, searchable or copyable after flattening, and the file may end up larger than the original; a password-protected PDF needs to be unlocked first with the Unlock PDF tool.
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