Text Diff Checker
Checked and verified · August 15, 2026
Compare two blocks of text side by side and see every added, removed, and changed line or word highlighted. Runs entirely in your browser — nothing is uploaded.
Compare by
Options
For any feedback, bug report and request:
Contact UsHow it works
- Paste the original text on the left and the changed text on the right.
- Click Compare to see the differences highlighted — added text in one color, removed in another.
- Switch between line-level and word-level comparison depending on how fine-grained you need the highlighting.
- Toggle "Ignore whitespace" or "Ignore case" if formatting differences shouldn't count as changes.
Frequently asked questions
Does this upload my text anywhere?
No — the comparison runs entirely in your browser using a standard diff algorithm. Nothing is sent to a server.
What's the difference between line and word comparison?
Line mode highlights entire lines that were added, removed, or changed — good for comparing documents or code. Word mode highlights the specific words that differ within a line — good for comparing sentences or short text.
Can I ignore whitespace or capitalization differences?
Yes — both are optional toggles, useful when you only care about actual content changes rather than formatting.
Is there a text length limit?
No fixed limit for everyday documents, though an extremely large comparison (many thousands of lines on each side, multiplied together) shows a message asking you to shorten the input or switch to line mode rather than freezing the page.
Can I use this to compare code?
Yes — line-level comparison works well for code, config files, or any structured text, though it's not aware of language syntax the way a dedicated code diff tool would be.
Your files are never uploaded. Gotool.xyz runs entirely as JavaScript in your browser. Your files are processed in memory and never touch a server — nothing to breach, nothing to clean up. Close the tab and it's like it never happened. The only thing we count is which tool ran (just the name, e.g. "merge") so we know what people find useful — never your file, its name, its size, or anything in it.
