Text & regex

Online text diff: compare additions and deletions

Compare two texts line by line with additions, deletions and unchanged content. Review configuration, SQL, JSON and Markdown edits locally.

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How to use

Paste the original and modified text. Comparison is line based and includes whitespace and blank lines.

Your input stays yours

Step by step

Paste the earlier version into Original text.
Paste the new version into Modified text and choose Run.
Review + and − markers and reduce the comparison range if needed.

Example: a version change

Before:
version: 1
active: true

After:
version: 2
active: true

Paste the two lines under each label into the matching editor. version: 1 should be removed, version: 2 added and active: true unchanged.

Frequently asked questions

Does it ignore whitespace?

No. Spaces, blank lines and newline differences participate in comparison. If two JSON texts differ only in indentation, format them before comparing.

Does it compare objects or individual words?

Comparison is line based and does not understand object keys, field meaning or SQL semantics. A changed line may appear as one removal and one addition.

Why can large comparisons fail?

Combined input is limited to 100,000 UTF-16 code units, with additional computation time and edit-distance bounds. Compare smaller, relevant sections.