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Text Diff Checker

Paste two versions of a text (code, config, essays, anything), hit Compare, and get a color-coded side-by-side diff with exact additions and deletions. The diff engine runs on the server, so even large documents are compared with a robust longest-common-subsequence algorithm.

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Gebruik Text Diff Checker

Text Diff Checker

Paste two versions of any text, hit Compare, and see exactly what changed — line by line, with addition and deletion counts.

Origineel

Vóór versie

Modified

Na versie

Diff result

Side-by-side comparison
Max 1,500 combined lines
Paste two versions and click Compare to see the diff.
Comparing…

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How to Use This Tool

Paste your Original and Modified text into the two editors, then click Compare. The result shows a side-by-side diff: removed lines are highlighted in red on the left, added lines in green on the right, and unchanged lines stay as context.

1. Enter the two versions

Paste or type the original text on the left and the modified text on the right. You can click Sample to load a ready-made example pair, Swap to flip the two sides, or Clear to start over. Each editor also has a Paste button that reads your clipboard.

2. Compare

Click Compare. The tool sends both texts to the diff engine and renders the result in a read-only diff view. The summary bar shows how many lines were added (+) and removed (−).

3. Read the result

Use the summary bar for quick counts, then scroll the diff view to inspect each changed region. If the texts are identical, the tool says so.

Limits

Each side accepts up to 200,000 characters, and the combined line count is capped at 1,500 lines to keep comparisons fast.

Features

  • Server-side diff engine with line numbers on both sides
  • Side-by-side view with color-coded additions and deletions
  • Addition / deletion counts in the summary bar
  • Sample, Swap, Clear, and Paste controls
  • Works for code, config, prose, and any other line-based text

Veelgestelde vragen

Korte antwoorden op de vragen die gebruikers stellen voordat ze het resultaat vertrouwen.

It compares two texts line by line and highlights which lines were added, removed, or left unchanged. The result helps you review edits to code, documents, or configuration files.

Yes. To produce an exact diff, the two texts are sent to the tool's diff endpoint over HTTPS and compared server-side. They are not stored or logged.

Each side can be up to 200,000 characters, with a combined limit of 1,500 lines. Larger inputs are rejected to keep the comparison fast.

It shows the number of lines added (present only in the modified text) and removed (present only in the original text) in the diff.

Yes. Any line-based text works, including source code, JSON, YAML, CSV, and plain prose.

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