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破損したPDFを修復

開けない、または他のアプリで壊れて見えるPDFを修復します。

使い方

1. 破損したPDFをアップロード。2. 内部構造を再構築します。3. 修復されたファイルをダウンロード。

どのような問題を修復できますか?

壊れたクロスリファレンステーブル、切り詰められたファイルや不正な形式のファイル、その他PDFが正常に開けなくなる内部的な破損など、一般的な構造上の問題です。ファイルから実際に失われたページやコンテンツを復元することはできません。

ファイルを修復できない場合は?

開けないままのファイルではなく、エラーが表示されます — 一部の破損は修復するには深刻すぎる場合があります。

Why did my PDF get corrupted in the first place?

Usually it's not something you did. The most common causes are a download or file transfer that got cut off partway through, a cloud sync (Google Drive, OneDrive, WhatsApp) that didn't finish writing the file, or whatever program created it crashing before it finished saving. Any of those can leave the file's internal structure incomplete even though most of the actual content is still in there.

Is a PDF that asks for a password the same problem?

page.repair.faq4Text

Does repairing change how the PDF looks or what's in it?

No. It only touches the file's internal structure — things like the cross-reference table that tells a reader where each page and object lives — not the actual content. Text, images, and layout come through as they were; nothing gets recompressed, rasterized, or flattened in the process.

What can I try if the repair doesn't work?

A few things worth trying before giving up on the file: open it in a different PDF reader in case the problem is the viewer rather than the file, go back to wherever you got it and download or export it again — the copy you have may be the one that got cut off — or ask whoever sent it for a fresh copy. If none of that helps, the damage is likely too deep for any tool, ours included, to reconstruct.