Text Diff Checker
Paste two versions and compare immediately. The layout follows a desktop diff workflow: original on the left, modified on the right, synced scrolling, inline highlights, and quick jump controls.
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Help & answers
Frequently Asked Questions
What does a text diff tool do?
It compares two blocks of text side by side and highlights additions, deletions, and unchanged lines so you can quickly see what changed between two versions.
Can I diff source code, not just plain text?
Yes. The diff tool works on any text including source code, configuration files, SQL queries, JSON, and documentation. It compares raw text content without language-specific syntax awareness.
How are changes shown in the output?
Added lines are shown in green, deleted lines in red, and unchanged lines in neutral color. Some views also highlight character-level differences within changed lines for precise comparison.
Does the tool upload my pasted text?
No. Comparison runs in your browser. Do not paste confidential code, credentials, or private data into any public tool.
Important disclaimer: Alexonic Tools is completely free to use. There is no charge, and we do not save tool inputs or generated results. We value customer privacy and keep building and fixing each day. Always verify important financial, payroll, legal, tax, business, or production-code results before relying on them. If you see an issue, need a tool, or require an update, send feedback to the developer.