What problem does this tool solve?
When an article, product description, or document changes, it can be difficult to spot exactly what was edited. Our Text Difference Checker compares two versions and marks additions and removals.
Six practical questions answered
How do I compare two versions of a text?
Paste the original and revised versions into the separate fields, then choose a word-level or line-level comparison.
How can I find passages removed from a draft?
The comparison marks content present in the original but missing from the revision as removed.
How can I identify newly added words?
Choose word comparison. New text is highlighted and labeled as added, separately from unchanged content.
How do I review edits to SEO copy?
Compare both versions and inspect changed headings, terms, and paragraphs. The tool identifies text differences, not their effect on rankings.
How can I compare two product descriptions?
Paste both descriptions and select word mode for small wording edits or line mode for structural changes.
How can I catch accidental edits before publishing?
Review the marked additions and deletions, especially removed facts, replaced terms, and moved sections. Human review remains necessary.
How it works, with an example
The comparison finds common sequences in their original order. Word mode uses words, whitespace, and punctuation as units; line mode uses complete lines.
Practical example
Comparing “Our store is new.” with “Our store is fast.” marks “new” as removed and “fast” as added. One empty version allows you to review complete additions or deletions.
Common use cases
- Compare an original and revised draft.
- Review edits to a short list.
- Copy differences for editorial review.
Limits and considerations
Each version allows up to 20,000 UTF-16 units and either 500 lines or 1,500 word/whitespace/punctuation units. These limits protect browser performance. Moved passages may appear as removal and addition. This is not semantic analysis.
Frequently asked questions
Can I compare a complete article?
Yes, within the displayed character and comparison-unit limits. Divide longer articles into sections if the tool asks you to reduce the input.
Are differences marked with more than color?
Yes. Added and removed content has both visual highlighting and explicit text labels.
Can the checker compare individual words?
Yes. Choose word comparison or switch to whole-line comparison.
Do I need a paid plan to compare drafts?
No. Both comparison modes are free.
Does the comparison store either version?
No. Both texts are processed locally in your browser without persistent storage.
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Request a free consultation (German form) →Editorial team: SEOSTUDIO · Updated November 9, 2026 · Tool version 1.1