Text Diff Checker
Compare two text blocks and quickly find lines that were added or removed.
Added Lines
Removed Lines
What is Text Diff Checker?
Text Diff Checker compares two blocks of text and highlights lines that were added, removed, or changed. It is useful for reviewing document edits, comparing config file versions, or spotting changes in copied content.
How to use
- Paste the original text into the left (Original) box.
- Paste the modified text into the right (Modified) box.
- Click Compare to see the diff. Added lines are highlighted in green, removed lines in red.
Notes
- Comparison is line-by-line. Inline word-level diffing is not performed.
- Empty lines count as lines and are included in the comparison.
- The tool works entirely in your browser — text is not uploaded anywhere.
FAQ
- Can I compare code files?
- Yes. Paste the contents of any plain text or code file. The diff is line-based, which matches how most code review tools work.
- Does it detect moved lines?
- No. Lines that are moved to a different position are shown as a deletion in the old location and an addition in the new location.
- Is the comparison case-sensitive?
- Yes. "Hello" and "hello" are treated as different lines.
Overview
Compare two blocks of text line by line and highlight added and removed lines. Useful for reviewing document revisions, config changes, and copied-text verification.
How to use
- Paste the original text into the left input.
- Paste the revised text into the right input.
- Run the comparison and review highlighted additions and deletions.
Examples
-
Config file review
Input: Two versions of an .env or YAML snippet
Output: Changed lines highlighted for quick review.
-
Article revision check
Input: Draft v1 and draft v2
Output: Added and removed sentences shown per line.
Notes
- Comparison is line-based; a small edit marks the whole line as changed.
- Whitespace differences count as changes. Trim text first if you want to ignore them.
- Both texts stay in your browser and are never uploaded.
FAQ
- Does it show word-level differences?
- The tool compares lines. For word-level review, split long paragraphs into shorter lines first.
- Can I compare code?
- Yes. Line-based comparison works well for code, configuration, and structured text.
- Is my text uploaded?
- No. The comparison runs entirely in your browser.
Embed this tool
Paste this iframe into any HTML page to embed Text Diff Checker on your site:
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