Contrast by Unifysy
Free Private

3-Way Merge Editor

Compare two texts side by side and cherry-pick individual changes to build a merged result. Accept changes from either the original or modified version, row by row.

Original (A)
Empty
Changed (B)
Empty

Paste two versions above to start merging

Or to see the merge editor in action.

How the Merge Editor works

  1. Paste or upload your Original (A) and Changed (B) texts.
  2. Click Compare & Merge to see a side-by-side diff.
  3. For each changed line, use the ← or → buttons to pick which version to keep.
  4. The Merged Output updates live as you make selections.
  5. Copy or download the final merged result when you're done.

Features

  • Row-by-row cherry-picking with visual indicators
  • Char-level highlighting shows exact changes within lines
  • Accept All Original / Accept All Changed bulk actions
  • Live merged output with copy & download
  • 100% client-side — no data leaves your browser