โ Frequently Asked Questions โ Diff Checker
What kinds of content can I compare?
You can compare any text content โ source code (JavaScript, Python, CSS, HTML), configuration files (JSON, YAML, TOML), plain text documents, SQL queries, log files, and more. The tool does a line-by-line comparison, making it most useful for structured text.
How does the diff algorithm work?
The tool uses a line-by-line comparison approach. Each line in the original is matched against lines in the modified version. Lines that exist only in the original are marked as removed (red), lines only in the modified are marked as added (green), and lines with the same position but different content are marked as changed (yellow).
Is my content kept private?
Yes โ all comparison processing happens entirely in your browser using JavaScript. Your text is never sent to any server. This makes the tool safe for comparing sensitive code, configuration files with credentials, or private documents.
What is the maximum text size I can compare?
There's no hard limit, but very large files (thousands of lines) may be slow depending on your device. For comparing large files efficiently, command-line tools like git diff or the diff command are better suited. This tool is ideal for quick comparisons of code snippets, config sections, and medium-length documents.