Text Diff Tool Online — Spot Differences Between Two Texts Instantly

Compare two texts and see the differences highlighted.

Privacy first: This tool runs entirely in your browser. Your data never leaves your device.

Paste two versions of any text and instantly see exactly what changed — additions, deletions, and modifications are highlighted in a clear, color-coded view. Useful for comparing document revisions, code snippets, or configuration files. Runs entirely in your browser.

How to Use Text Diff

  1. Paste the original text: Enter or paste the first (original) text into the left panel.
  2. Paste the modified text: Enter or paste the second (modified) text into the right panel.
  3. Compare: Click "Compare" to generate a highlighted diff showing all additions, deletions, and unchanged lines.
  4. Review the differences: Green highlights indicate added text, red indicates removed text.

Features

  • Color-coded highlighting of additions and deletions
  • Line-by-line and character-level diff views
  • Handles plain text, code, and configuration files
  • Runs entirely in your browser — no server upload
  • Free with no account required
  • Instant results for texts of any length

Common Use Cases

Text diff is used by developers reviewing configuration changes, writers comparing document drafts, and QA engineers checking output consistency. It is a faster alternative to manually reading two versions side by side.

Frequently Asked Questions

What types of content can I compare?
Any plain text content: documents, code, JSON, YAML, configuration files, emails, legal clauses, and more.
Is there a size limit on the texts I can compare?
There is no enforced limit. Very large texts may take a moment to process, but the tool handles typical documents and code files without issue.
Are my texts sent to a server?
No. Comparison is performed entirely in your browser. Your text never leaves your device.
Can I compare code files?
Yes. The tool treats all input as plain text, making it suitable for comparing any code regardless of language.

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