Flatten a PDF's form fields into ordinary page content so answers can't be changed, or flatten everything into page images to bake in comments, stamps and layers.
Works in your browser. What you paste or upload is processed on your device.
Choose or drop the PDF. The tool counts its form fields and comments.
Pick Flatten form fields to keep text selectable, or Flatten everything to bake in all markup.
For Flatten everything, pick 150, 200 or 300 DPI.
Press Flatten PDF and save the flattened copy.
Flattening turns interactive parts of a PDF into plain page content. This tool has two modes. Flatten form fields uses pdf-lib to draw each field's current value onto the page and remove the field, so the answers can no longer be edited. Text stays selectable and searchable, and the file stays about the same size.
Flatten everything renders each page with pdf.js and saves it as an image at 150, 200 or 300 DPI. Form fields, comments, sticky-note icons, stamps, drawing markup and optional layers are all baked into the picture exactly as they look on screen. Use it when a print shop, portal or court system rejects files with annotations, or when you want a copy that looks identical in every viewer.
The trade-off of the image mode is that text can't be selected, searched or copied any more, and the file is usually larger. Field flattening only covers form fields; comments and markup stay as they are, which the tool tells you before you run it.
A filled form you send back should arrive the way you filled it. Unflattened fields can be changed by anyone who opens the file, some viewers show them differently or not at all, and upload portals often reject PDFs with active fields or annotations. Flattening in your browser takes a few seconds and keeps the document private.
Something else? Ask the team
It makes interactive elements part of the page. A flattened form field shows its value as ordinary content and can't be edited. Flattening everything also turns comments, stamps and layers into part of the page image.
With Flatten form fields, yes. With Flatten everything, no: each page becomes an image. Run OCR PDF on the result if you need searchable text again.
Field flattening only changes form fields. Choose Flatten everything to bake comments and markup into the page.
No. Flattening happens in your browser, and the file never leaves your device.
Yes, in Safari and Chrome. Image mode at 300 DPI on long documents needs a lot of memory, so on older phones use 150 or 200 DPI.
Not in the flattened file. Keep your original PDF if you might need to edit the fields again; the tool always saves a new copy and never changes your original.
You get 1 free run of this tool per day. After that, each run costs 5 credits from a free AI Rank Lab account (1 credit is 1 US cent). A run is one press of the main button; changing options, previews and editing before that are free. If a run fails, it is handed back automatically.
Each one opens on its own page and works straight away, with no sign-up.
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