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Flatten PDF

Flatten form fields and annotations into content

How it works:

  1. 1Upload a PDF file
  2. 2Choose what to flatten (forms, annotations, or both)
  3. 3Click "Flatten PDF" to apply

About this tool

Fuse form fields, annotations, and interactive elements straight into the static page content so they're locked permanently in place. This is what you reach for when finalizing completed forms before sharing, stopping recipients from editing the data you entered, or guaranteeing the document looks identical in every viewer and on every printer. After flattening, fillable fields, checkboxes, comments, and markups become part of the page itself, and what's visible is preserved precisely as intended with no editable layers left behind. Submitting official forms, archiving signed paperwork, or distributing files that must stay unchanged are exactly the moments it earns its keep. Confidentiality is never in question here, since the whole process executes inside your browser on your own machine and your files are never sent anywhere. The flattened PDF keeps its full quality and is ready to save immediately. A dependable tool for professionals locking down forms, businesses sending out fixed documents, and anyone needing a tamper-resistant, print-ready file.

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Frequently Asked Questions

Upload your PDF and the tool merges form fields, annotations, and interactive elements directly into the static page content. Fillable fields, checkboxes, comments, and markups become part of the page, and you can download the locked file immediately.
They're locked permanently into the page. After flattening, checkboxes, text fields, and other inputs become part of the static content, so recipients can't edit the data. This is ideal for finalizing completed forms before sharing or archiving signed documents.
Flattening prevents recipients from altering filled-in data and ensures the document displays consistently across every PDF viewer and printer. It's perfect for submitting official forms or distributing tamper-resistant, print-ready files that must look exactly as intended.
Yes. Beyond form fields, annotations such as comments and markups are merged into the page content too, so the visible result is preserved exactly without any editable layers remaining on top of the document.
Flattening is free with no account needed. All processing happens locally in your browser, so your completed forms and signed documents are never uploaded to a server. Your sensitive data stays private on your device.

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Guides and explainers related to this tool