What does flattening a PDF mean?

Flattening a PDF converts all interactive elements such as form fields, checkboxes, dropdown menus, and annotations into static content that is permanently embedded in the page.

Why would I want to flatten a PDF?

Flattening ensures the document looks the same on every device and PDF viewer. It also prevents accidental or intentional changes to form data and annotations.

Can I edit form fields after flattening?

No. Once flattened, form fields become part of the static page content and can no longer be edited. Keep your original file if you may need to make changes later.

Will flattening reduce the file size?

In many cases, yes. Flattening removes the interactive form structure and can reduce file size, especially for forms with many fields.

Does flattening affect the visual appearance?

No. The visual appearance remains identical. All filled form values and annotations are preserved exactly as they appear, just as non-editable content.

PDFフラット化

Flatten your PDF documents to convert all interactive form fields, annotations, and comments into static, non-editable content. This ensures the document appears identically on every device and prevents further modifications to form data.

ファイルはローカルで処理され、サーバーにアップロードされることはありません。

使用例

Finalizing Completed Forms

Flatten filled PDF forms to lock in responses and prevent accidental edits before submission or archiving.

Ensuring Display Consistency

Flatten PDFs to guarantee they render identically across all PDF viewers, devices, and operating systems.

Preparing for Digital Signatures

Flatten annotations and form fields before applying digital signatures to ensure document integrity.

Archiving Official Documents

Flatten completed government forms, contracts, or official records for tamper-resistant long-term archival.

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