Spot added, removed and unchanged lines

Spot added, removed and unchanged lines. Built for writers, designers and developers preparing content or an asset before publication.

Spot added, removed and unchanged lines. The answer appears right away in your browser and is ready to use, with no account, upload or stored data.

How to use

Paste the first text into the field, then add the indicated separator on its own line before the second text.
Enter the second text after that separator to prepare the comparison of the two versions.
Run the comparison to spot added, removed and unchanged lines.
Read the result line by line to understand what changed between the two versions.
Erase the content or replace the texts when you want to compare another pair of versions.

Example

With two versions separated by the expected marker, the tool highlights the lines that differ. Look carefully at which lines are marked as added, removed or unchanged, then decide whether the edit matches your intention before you publish or save the new version to your project.

Input

Hello world
--
Hello there

Output

+ 1 ajoutee(s)
+ Hello there

- 1 retiree(s)
- Hello world

= 0 inchangee(s)

Limits and formats

The comparison works on lines; it is not a grammatical or semantic analysis of the content.
An invisible difference, such as a trailing space, can create a difference in the result.
The separator must be placed correctly; otherwise the two texts may be read as a single block.
Check important changes before publishing or saving a new version.
The result does not merge the texts or fix mistakes; it only points them out.

Where processing happens

The comparison runs in your browser. Both entered texts stay on the page, are analysed locally, and the result is neither transmitted nor kept elsewhere. You can therefore work on drafts, notes or extracts without uploading them.

Frequently asked questions

How do I separate the two texts to compare?

Put the first text, then the indicated marker on its own line, then the second text. The tool uses that marker to know where the second version begins, which prevents the two texts from being read as one block.

Does the comparison detect changes inside one line?

The result is presented by lines. A change inside a line is therefore reported at that line level; read the detail carefully to locate the exact edit.

Can I compare long files?

The field accepts multiline text, but very long content can be harder to review. For large files, compare them in sections or use a tool designed for version differences.