Flatten PDF
Print filled form fields, stamps and markup straight into the page so nobody can change them and every reader shows the document the same way.
Drop your files here
.pdf · up to 300 MB
How to Flatten PDF
- 1
Add your PDF
Drop in one file or up to twenty. The document is opened by your own browser, so nothing travels to a server on the way.
- 2
Choose what to flatten
Flatten form fields, annotations, or both at once. Tick the confirmation box first: flattening cannot be undone afterwards.
- 3
Download the flattened PDF
Save the result. Filled values stay visible on the page, but they can no longer be edited, cleared or overwritten.
What flattening changes
A form field is a separate object floating above the page: it stores a value that your reader draws for you. Flattening paints the field's own appearance into the page content stream and then deletes the field itself. The words you typed stay where they were, at the same size and in the same font, but they are page content now: there is no box left to click into, no value to clear, and no reader setting that could draw them differently. Stamps, highlights, notes and signature images are handled the same way.
Which parts you can flatten
Pick forms to fix filled fields while comments and markup stay editable, which suits a contract already signed but still under review. Pick annotations to burn in stamps and notes while the fields themselves remain fillable, which suits a template still being passed around. Pick both, the default, when the document goes out for good. Hyperlinks are deliberately left alone in every mode: a link has no appearance of its own, so flattening it could only mean deleting it, and a page that has quietly stopped linking anywhere is a surprise nobody asked for.
Your file stays on your device
The PDF is read, flattened and rewritten inside this browser tab. It is never uploaded, never queued on a server, and no copy is left behind for anyone to delete later. Close the tab and the document is gone from memory. Signed contracts, filled medical forms and internal reports never leave the machine they are stored on.
Frequently asked questions
What does it mean to flatten a PDF?
Flattening prints the interactive parts of a document into the page itself. Form fields, stamps and markup become ordinary page content: they look identical, but they can no longer be selected, edited or cleared, and every reader draws them the same way.
Can I undo flattening?
No. Once a field is drawn into the page and removed, its value is graphics rather than data, and there is nothing left to turn back into a field. Keep the original file if you might need to edit it again; that is what the confirmation box is warning you about.
Do hyperlinks still work after flattening?
Yes. Link annotations survive in every mode. A link has no appearance to print into the page, so flattening one could only mean deleting it, and you would lose working references for nothing in return. Clickable links behave as they did before.
Why did my fields come out blank?
Because the file stored your answers as data without drawing them yet, which is what many form fillers do. This tool rebuilds each field's appearance before flattening, so the values are painted first. If a field was empty, only its outline gets printed.
How is flattening different from a password?
Flattening changes the document; a password changes who may open it. A flattened file still opens for anyone, but its filled values are fixed. Password protection leaves every field editable for whoever has the password. The two are often used one after the other.
Why can XFA forms not be flattened here?
XFA forms are built from an XML template that browsers cannot draw, so there is no appearance to print into the page. Files like these come from older government and banking systems, and Adobe Acrobat can still open and flatten them for you.
Should I flatten a PDF before printing it?
Usually yes, if the document has filled fields. Some printer drivers and older readers skip field content altogether or draw it at a different size. Flattening removes that uncertainty: what you see on screen is what comes out of the printer.
Does flattening count as an electronic signature?
No. Flattening only stops fields from being edited; it says nothing about who filled them in or when. A digital signature adds a verifiable certificate and detects later changes. Flatten to fix the layout, sign to prove authorship.
Guides
- Redacting a PDF Properly (a Black Rectangle Isn't Redaction)A black box drawn over a paragraph in a PDF doesn't remove the text underneath it, and that mistake has leaked real documents before.
- Flattening a PDF Form Is Not the Same as Filling It InFilling in a PDF form and flattening one are two different operations, and confusing them either leaves a document editable or locks it too soon.
Related tools
PDF FormsType into the fields of a PDF form in your browser, or draw new fields on a flat page and turn it into a form other people can fill in.
Sign PDFDraw your signature, add a photo of it or type your name, then drop it where it belongs. A visual signature, not a certificate-based one.
Protect PDFPut an open password on a PDF, encrypt it with AES-256 and decide who may print, copy or edit it.
Compress PDFMake a PDF smaller by re-encoding the images inside it, dropping duplicated objects and clearing metadata, without sending the document anywhere.
Annotate PDFHighlight text, underline it, drop sticky notes and draw arrows on any PDF while the original pages stay as they were.
Remove PDF MetadataStrip the author name, the working title, the timestamps, the XMP packet and the document ID out of a PDF before you send it anywhere.