Text Diff Checker — Compare Two Texts
Compare two blocks of text side-by-side. See additions, removals, and changes highlighted.
How to Use Text Diff Checker
- 1
Paste the original text on the left.
- 2
Paste the modified text on the right.
- 3
See differences highlighted — green adds, red removes.
About Text Diff Checker
Compare two blocks of text instantly with a side-by-side, colour-coded diff view. Red highlights removed lines, green highlights added lines, and unchanged context is dimmed. Great for reviewing edits, comparing config file versions, or validating data transformations. Works entirely in your browser — your texts are never uploaded.
Built by
Fateh Raiyan IshmumFull-stack dev since 2020. Full-stack web developer since 2020. Builds privacy-first, open-web tools. Specialises in Next.js, TypeScript, and performance-focused design.
Frequently Asked Questions
Line-by-line longest-common-subsequence algorithm, similar to Git's diff. Detects additions, deletions, and unchanged lines.
Yes — line-based diff works well for source code. For heavy code review, use a dedicated merge tool.
Yes, up to hundreds of KB. Very large inputs may be slow in-browser.