Flattening converts fillable form fields into fixed page content, so the values can no longer be edited. Drop a PDF below to flatten it in your browser. Nothing is uploaded.
A fillable PDF stores every form field as a separate interactive object that sits on top of the page. The text you typed is not part of the page: it is a value attached to that field, and any PDF viewer can change it. Flattening draws each field's current appearance into the page itself and then deletes the field. The result looks identical, but the boxes are gone. What used to be a field is now ordinary page content, like printed text.
The same word is used in graphic design for merging image layers. For PDF forms it only concerns form fields and, optionally, annotations such as comments, stamps and links. The text layer is kept, so the document stays selectable and searchable.
Once flattened, a signed application, contract or W-9 cannot be altered by whoever receives it, and it looks the same in every viewer.
Court e-filing systems, HR portals and some government sites refuse PDFs that still contain form fields. Flattening removes the fields without touching the layout.
If your typed values vanish in a browser preview, on a phone or when printing, flatten the file. The values become page content that every viewer can draw.
Flat PDFs carry no field dictionaries, JavaScript or appearance states, so they merge, split, index and archive more predictably.
Drag a completed PDF form onto the box above or click to browse. Your browser opens the file locally; it is not sent to a server.
The tool lists the number of pages, fillable fields and interactive annotations. Tick the checkbox if you also want links and comments removed.
Click "Flatten & Download". A copy named flattened_yourfile.pdf is saved to your device. The original file is left untouched.
Most PDF applications can flatten a form, but the command is rarely called "flatten", and the free Acrobat Reader has no such command at all. Print-to-PDF routes work everywhere but re-render the pages, which drops hyperlinks and bookmarks. This is where the option lives in each tool.
| Tool | How to flatten | Notes |
|---|---|---|
| Adobe Acrobat Pro | Tools → Print Production → Preflight → PDF Fixups → "Flatten annotations and form fields". Or File → Print, choose the Adobe PDF printer and set Comments & Forms to Document. | Paid. The Preflight fixup keeps links and page size intact; the print route does not. |
| Adobe Acrobat Reader (free) | No flatten command. Print to a PDF printer such as Microsoft Print to PDF on Windows instead. | Printing re-renders the pages, so hyperlinks are dropped. |
| macOS Preview | File → Print → PDF → Save as PDF. Do not use File → Export as PDF: Apple documents that Export keeps fields and annotations editable. | Free, built in. Same trade-offs as any print route. |
| Chrome / Edge | Open the PDF in the browser, press Ctrl+P (Cmd+P on Mac) and set the destination to Save as PDF. | Free. Field values are fixed; links and bookmarks are lost. |
| Word / Google Docs | Not available. Both convert the PDF into a document, which reflows the layout. | Use a PDF tool instead. |
| This tool | Drop the file above and click Flatten & Download. | Free, in-browser, keeps links and page geometry unless you choose to remove annotations. |
Type into any PDF in the browser, download the completed copy, then come back here to flatten it before sending.
Fill a PDF onlineWent the other way and need to add fields? Make a PDF fillable