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Flatten PDF Form Fields

Bake interactive AcroForm fields into static page content in your browser. The result opens as a plain document — no fields, no editing.

Choose a form PDF

Arbitrary annotations and comments are not AcroForm fields and pass through unchanged.

Flattened PDF

The flattened, uneditable PDF appears here.

Your file is never sent to a server. It is read and processed by your own browser, and the results are not stored.

How to use it

  1. Choose a PDF that contains form fields.
  2. Check the field summary shown before flattening.
  3. Flatten and download — the result opens as a plain document with no fields.

Limits worth knowing

  • AcroForm fields only; arbitrary annotations, comments and ink are left untouched.
  • Signature fields are flattened, which invalidates the cryptographic signature’s verifiability — sign after flattening, never before, if verification matters.
  • The form must be readable; encrypted PDFs are refused.
  • The result is not a “locked” document — it just has no fields left.

What “flatten” means

A PDF form is two layers of information: the page itself, and the appearance of each field plus its value. Readers normally show the second layer and keep it interactive. Flattening takes the current field appearance and writes it into the page content, then removes the form machinery — the result is an ordinary document that just happens to look like a filled form.

That is the right operation when you need a completed form that cannot be edited: applications, records, archival copies.

What it does not do

It is not redaction, it is not encryption, and it is not signature validation. If you need any of those, use the dedicated tools on this site; if you need a signed document verified, verify before flattening.

Frequently asked questions

Does Flatten PDF Form Fields upload my files to any server?

No. Flatten PDF Form Fields runs in your browser, and the file is read there rather than sent to a server for processing. Our host still sees ordinary page-request metadata, which is described on the privacy page.

Is Flatten PDF Form Fields free to use?

Yes, Flatten PDF Form Fields is free, with no paid tier, no account, and no watermark added to your output. The limits are technical rather than commercial: file size, page count and supported formats are listed on this page.

What file formats and sizes are supported?

Flatten PDF Form Fields supports .pdf files up to 100MB directly in your browser.

What exactly gets flattened?

AcroForm fields: text fields, checkboxes, radio buttons, dropdowns, list boxes, buttons and signature fields. Their current values are burned into the page as permanent marks.

Are annotations, comments and highlights flattened too?

No — and saying otherwise would be false. Arbitrary annotations (sticky notes, highlights, freehand ink) are not AcroForm fields and are passed through unchanged. For a fully locked document you need a print-to-PDF step.

Will the values survive unflattening?

There is no unflattening. Flattening converts the field data to page content; the fields themselves are gone from the result.

Is my file uploaded?

No. The form is read and burned locally; nothing leaves your device.