DocumentMage

Text transform

Text Compare

Compare two versions of a document and highlight lines that were added, removed, or kept.

Text is processed in your browser. DocumentMage does not upload it to our servers.

Unchanged

1

Removed

2

Added

2

Line diff

  1. −Payment is due in 15 days.
  2. +Payment is due in 30 days.
  3. Late fees may apply.
  4. −Thank you.
  5. +Please send remittance to accounting.

Examples

Contract redline lite

Paste yesterday’s terms and today’s terms to see which clauses moved. This is a text helper, not a legal review.

Essay revision

Compare an outline against the finished section to confirm you did not drop a required paragraph.

How to use it

  1. Paste the original draft on the left and the revised draft on the right.
  2. Turn on ignore case or ignore whitespace if those changes are noise.
  3. Read the added, removed, and unchanged line counts, then scan the highlighted diff.

Limits

  • This is a line diff, not a Microsoft Word track-changes file.
  • Moved paragraphs may appear as a deletion plus an addition.

Questions

How does the comparison work?

The tool uses a line-based longest-common-subsequence diff. It is deterministic: the same two inputs always produce the same result.

Can I compare Word files?

Paste the text from each version. The tool does not open .docx or PDF uploads.

Does ignore-whitespace hide every spacing change?

It ignores leading and trailing spaces on each line, and it can treat blank-line-only changes as equal when that option is on.

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