Text Diff Checker
Compare two texts side-by-side and highlight the differences.
Removed Lines
Added Lines
Unchanged Lines
Diff Output
How It Works
Paste the original text in the left panel and the revised text in the right panel, then click Compare. Additions are highlighted in green and deletions in red.
**Text Diff Checker — Find What Changed Between Two Texts**
Comparing two versions of a document manually is tedious and error-prone. Even experienced editors miss subtle changes — a word swap, a punctuation tweak, or a sentence reordering can slip through unnoticed. ToolVerse's Text Diff Checker performs a precise line-by-line and word-by-word comparison and visually highlights every addition and deletion.
**How the Comparison Works**
The diff algorithm compares texts using a longest-common-subsequence (LCS) approach — the same method used by Git, version control systems, and code review tools. This ensures the minimum edit distance is shown, making the differences as clear as possible.
- **Green highlights** — Text that was added in the new version.
- **Red highlights** — Text that was removed from the original.
- **Unchanged lines** — Displayed normally so context is preserved.
**Practical Use Cases**
*Legal and contracts* — Lawyers routinely compare contract revisions to spot clause changes. Our tool makes that review instant.
*Academic writing* — Students submitting revised drafts can show supervisors exactly what changed since the last submission.
*Content editing* — Editors comparing a writer's draft against their edited version can confirm all suggestions were incorporated.
*Code review* — While dedicated tools exist for code diffs, our tool handles any plain-text comparison including SQL queries, JSON configs, and Markdown.
*Plagiarism checking* — Compare two similar texts to see how much was changed from the original.
**Tips for Best Results**
1. For document comparisons, paste plain text (not HTML). Strip formatting first.
2. Use word-level diff mode for prose; use line-level diff mode for code or lists.
3. Large documents (10,000+ words) may take a moment to compute; this is normal for complex diffs.
**Privacy**
All comparison is performed locally in your browser. Neither text is ever sent to our servers.