# Text Diff

Canonical: https://dev.eneawork.it/text-diff
Language: en
Updated: 2026-11-02
Author: Enea Zani (https://eneawork.it)

Compare two texts line by line and copy the diff.

## What it does

A line diff shows exactly what changed between two versions of a file, config or article. This tool uses a longest-common-subsequence comparison, then marks added and removed lines. Options let you ignore trailing whitespace or letter case when those should not count as changes.

## How to use

1. Paste the original and the new text.
2. Set the ignore options if needed.
3. Compare and copy the report.

## FAQ

### Does it handle very large files?

It caps comparison work to keep the tab responsive. For large codebases use git diff, which is faster and smarter.

### Why do similar lines show as replaced?

The comparison is line-based; each line is a unit. A tiny change inside a long line shows the whole line as changed.

### Is my text uploaded?

No. Both texts stay in this page.

## Related tools

- [JSON Diff](https://dev.eneawork.it/json-diff)
- [Case Converter](https://dev.eneawork.it/case-converter)
- [Regex Tester](https://dev.eneawork.it/regex)

## Machine-readable

- Tool catalogue: https://dev.eneawork.it/tools.json
- Full AI context: https://dev.eneawork.it/llms-full.txt
- Privacy: https://dev.eneawork.it/privacy
- This page in HTML: https://dev.eneawork.it/text-diff
- Italian version: https://dev.eneawork.it/it/text-diff