Flatten PDF

PDFファイルのインタラクティブなフォームフィールドと注釈を静的なページコンテンツに平坦化し、編集できないようにします。ファイルはデバイスから離れません — すべての処理はブラウザ内でローカルに行われます。

設計上プライベート

ファイルは端末から送信されません。すべての処理はブラウザ内でローカルに行われます — アップロードもサーバーもありません。

PDF をここにドロップ

またはクリックしてファイルを選択

ファイルは端末から送信されません。

Converts interactive form fields and annotations into static page content so they can no longer be edited.

Flatten PDF converts interactive form fields and annotations into static page content so they can no longer be edited or filled. This locks in form data, prevents further edits, and ensures the document renders identically in all viewers. Flattening runs entirely in your browser via qpdf-wasm — your file never leaves your device.

仕組み

Flatten PDF の使い方

1
Drop your PDF. Drag and drop a PDF with form fields or annotations onto the drop zone, or click to choose a file from your device.
2
Click Run Flatten PDF. The tool converts interactive form fields and annotations into static page content locally in a Web Worker using qpdf-wasm. Your file never leaves your device.
3
Download the flattened PDF. The flattened PDF is offered as a download. Form fields and annotations are now baked into the page content.

機能

このツールの機能

Flattens interactive form fields into page content
Bakes annotations into the page content stream
Prevents further editing of form data
No upload — runs entirely in your browser

制限事項

知っておくべきこと

Flattening is irreversible — form fields cannot be made interactive again
Form field values are preserved but the fields can no longer be edited
Some complex annotations may render slightly differently after flattening

よくある質問

Is my file uploaded anywhere?

No. Flattening happens entirely in your browser using a Web Worker and qpdf-wasm. Your file never leaves your device.

What does flattening do?

Flattening converts interactive form fields and annotations into static page content. The visual appearance is preserved, but the fields can no longer be edited or filled. This is useful for locking in form data before sharing.

Can I undo flattening?

No. Flattening is irreversible — once form fields are baked into the page content, they cannot be made interactive again. Keep a copy of the original if you may need to edit the form later.

Will the flattened PDF look the same?

The visual appearance is preserved. Form field values and annotations render the same way — they are just no longer interactive. In rare cases, complex annotations may render slightly differently.