文本比较
并排比较两段文本，逐行突出显示差异。
差异输出
ℹ️ 关于 文本比较
The Diff Checker is a free online text utility that works entirely in your browser. Compare two texts side by side and highlight the differences line by line. Paste your text, run the tool, and see the result instantly — no signup, no uploads, no tracking of your content. The Diff Checker handles both short snippets and long documents, preserves formatting where relevant, and outputs clean, copy-ready text. Use it for writing, editing, SEO, translation support, or any workflow that touches plain text.
💡 使用场景
💎 专业提示
- Paste plain text whenever possible — rich formatting (from Word or Google Docs) may include invisible characters that affect the Diff Checker result.
- Run the Diff Checker twice after edits to catch inconsistencies that appear only after the first pass.
- Keep an original copy before running the Diff Checker, especially if it transforms the text irreversibly.
- For long documents, process section by section to verify each result rather than scanning the whole output at once.
- Combine this Diff Checker with our other text tools (counter, case converter, diff checker) for a complete writing workflow.
❓ 常见问题解答
Yes, 100% free with no signup required and no limits on how many texts you can process.
Yes. The Diff Checker runs entirely in your browser. Your text never touches our servers, so it stays completely private.
There is no hard limit. Extremely long documents (millions of characters) may slow down some browsers, but typical articles, essays, and posts process instantly.
Yes, the Diff Checker works with text in any language supported by Unicode, including non-Latin scripts like Chinese, Arabic, and Cyrillic.
The Diff Checker preserves plain-text structure (line breaks, paragraphs). Rich formatting (bold, italics, fonts) from word processors is flattened to plain text.
Most processing runs in the browser, so after first load you can often keep using the Diff Checker without an internet connection.