Compare Text — Engineering
See every line that changed between two blocks of text or files (.txt, .md, .xml, .html, .sql). Free, no account needed.
How to compare text
- Paste your first text block into the left panel — or load a text file straight into it.
- Paste or load the second version into the right panel.
- Every changed line is highlighted instantly — additions in green, removals in red.
Key features
- Paste text or load .txt, .md, .xml, .html, .sql, .log and other text files
- LCS diff algorithm — accurate line-by-line change detection
- Additions in green, deletions in red, unchanged lines shown for context
- Ignore-whitespace toggle for format-only changes — free, no account required
Common uses
- Compare environment variables between staging and production configs
- Spot what changed in a deploy script, Makefile, or command output
- Review changes in log output, error messages, or text-based API responses
Frequently asked questions
How do I compare text online?
Paste your first text block into the left panel — or load a text file straight into it. Paste or load the second version into the right panel. Every changed line is highlighted instantly — additions in green, removals in red.
Are my files private when I use this tool?
Yes. All comparison runs locally in your browser. Your files never leave your device and are never sent to any server — not a policy promise, but an architectural fact. There is no server receiving your data.
No AI means no hallucinations
Compare Files uses a deterministic, logic-based engine — not a language model. It reports every change that is actually in your files, and never invents one.
Your files never leave your device. Everything runs in your browser — no uploads, nothing stored.
No AI, so no hallucinations. A deterministic engine reports every real change and never invents one.
No upload, no server wait. Comparisons run locally and keep working offline once the page has loaded.