Text Comparison Tool

Compare two versions of a text line by line. Read added lines with +, removed lines with - and unchanged lines with a space prefix.

  • Free
  • No sign-up
  • Runs in your browser

Text and results stay on this page. Nothing is uploaded or automatically saved. Copying sends the result to your clipboard; downloading creates a local file.

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How this calculation works

The comparison preserves case, accents and spaces, normalizing only line endings. It uses a longest common subsequence of lines. Limits: 1000 lines per text and 250000 line pairs in total.

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How to use it

  1. Choose an operation and enter the text, or choose a generation quantity.
  2. Run the tool and check any format warning before using the result.
  3. Copy the result when ready. Clear the fields to remove it from this page.

Examples

  • Example 1

    Old line → New line shows one removed and one added line.

  • Example 2

    Identical texts contain only unchanged lines.

Add this tool to your site

Put this tool on your blog, store or club site. It runs inside your page, free, with no account, and a small "by VISU" credit line under it.

Questions

What does this tool do?

Compare two versions of a text line by line. Read added lines with +, removed lines with - and unchanged lines with a space prefix.

What are its format limits?

The comparison preserves case, accents and spaces, normalizing only line endings. It uses a longest common subsequence of lines. Limits: 1000 lines per text and 250000 line pairs in total.

Can I see a worked example?

Old line → New line shows one removed and one added line.

Is this text sent to a server?

Text and results stay on this page. Nothing is uploaded or automatically saved. Copying sends the result to your clipboard; downloading creates a local file.

Do I need an account?

No account is required to use the tool or copy its result. VISU services are optional.

Add this tool to your site

Free for you and your visitors. Pick a size, copy the code and paste it into any page of your site.

Width
Frame
Credit line
  1. Copy the code.
  2. In your site editor, add an HTML or "custom code" block where the tool should appear.
  3. Paste the code and publish. The height adjusts by itself.

The credit line under the tool links to the original page. Keep it if the tool is useful to you.

Preview

Text Comparison Tool by VISU