Diff Checker - Compare Text Side by Side

Compare two blocks of text with a line-by-line side-by-side diff

🔒 100% ブラウザ内🆓 ずっと無料⚡ サインアップ不要
注意: 下記のツールインターフェースは現時点で英語のみに対応しています。UI の翻訳は順次進めています。 このツールを英語で見る →
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使い方

  1. 1
    Paste both versions

    Drop the original into the left column and the changed version into the right.

  2. 2
    Read the diff

    Additions highlight green on the right, removals highlight red on the left, line numbers on both sides.

  3. 3
    Toggle whitespace

    Enable 'Ignore whitespace' to hide trailing-space or indentation-only diffs.

Diff Checker - Compare Text Side by Side について

Free online diff checker. Paste two blocks of text to see a side-by-side line diff - additions in green, removals in red, with line numbers. Optional ignore-whitespace mode. Runs entirely in your browser. 712 Tools の Diff Checker - Compare Text Side by Side はモダンな JavaScript API を使って完全にブラウザ内で動作します - サーバーがあなたのデータを見ることは一切ありません。つまり、即時の結果、完全なプライバシー、アップロード制限なしです。

デバッグ、簡単な確認、あるいは本番のインシデント対応まで - このツールは何度でも無料で使えます。ウォーターマークなし、サインアップなし、ツール内広告なし。

よくある質問

What algorithm is used?

A longest-common-subsequence (LCS) diff, the same approach used by git diff. Runs entirely in the browser.

Is there a size limit?

The LCS algorithm is O(n·m) in memory. Very large diffs (10,000+ lines) may slow the browser.

Are my texts uploaded?

Never. Both blocks stay in your browser - nothing is sent to any server.

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