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flowtools/Diff Checker

Diff Checker

Compare two texts side by side and find every difference.

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How it works

  1. 1

    Paste your original text in the left panel.

  2. 2

    Paste the changed text in the right panel.

  3. 3

    Differences are highlighted line by line — red for removed, green for added.

Why choose FlowTools

  • Side-by-side diff view makes changes easy to scan at a glance.
  • Line-by-line comparison with instant results as you type.
  • Added and removed line counts help you quickly assess the scope of changes.
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Frequently Asked Questions

A longest common subsequence (LCS) algorithm compares lines to produce a minimal diff.
Yes. The diff checker works with any text — code, prose, configuration files, or data.
No. Everything runs locally in your browser. Your text is never stored or transmitted.