Text Diff Checker

Compare two text blocks side by side, review line-level additions and removals, and copy a unified patch without leaving the browser. Keep the wide layout, but tighten the workflow around real submissions and clean rehydration.

View documentation

Compare texts

Paste the original text on the left and the updated version on the right to generate a line-aware diff.

Lines are compared in order, so keep paragraphs or lists aligned for clearer matches.

Use this pane for the version you want to compare against the original.

Useful for prose or support text where capitalization should not count as a real change.

Leave this on to ignore stray spaces, then disable it when indentation matters.

Side-by-side diff

Added and removed lines appear side by side with line numbers.

0 lines
No comparison yet

Submit the form to see added and removed lines side by side.

Diff summary

Track similarity and line-level changes at a glance.

Similarity

0%

Based on line-aware comparison

Lines compared

0 original · 0 modified

Includes blank lines after normalization

Added

+0

Removed

-0

Unchanged

0

Patch output

Drop this unified diff into tickets or code reviews. 

--- Original
+++ Modified

Tips

Small tweaks that lead to clearer diffs.

  • Paste the before text on the left and the updated text on the right for clearer context and numbering.
  • Enable whitespace trimming to ignore stray spaces, then toggle it off if indentation matters.
  • Use the patch output above to drop diffs into tickets, PRs, or documentation without exporting files.