How does the diff checker work?

Our diff checker uses the diff-match-patch algorithm to find the minimum set of changes between two texts. Additions are highlighted in green, deletions in red, and unchanged text is shown normally.

Can I compare code with this tool?

Yes. You can compare any text including source code, configuration files, SQL queries, or plain text documents. The tool preserves formatting and whitespace.

Is there a size limit?

There is no hard limit. Since all processing happens in your browser, performance depends on your device. Texts up to several megabytes work smoothly on modern devices.

What is the difference between inline and side-by-side view?

Inline view shows changes within a single panel with additions and deletions marked inline. Side-by-side view shows the original and modified text in two columns with line numbers, similar to GitHub's diff view.

Can I compare JSON or SQL specifically?

Yes. For best results with JSON, format both texts first using our JSON Formatter, then compare. For SQL, use the SQL Formatter first. This makes structural differences much clearer.

文本对比工具

对比两段文本，并排高亮显示差异。

数据不会离开你的浏览器Ctrl + Enter to run

原始文本

修改后

常见问题