文字比对
比较两段文字的差异
Original
原始文字
输入原始文字
Modified
修改后文字
输入修改后的文字
继续下一步
用相关的下一个操作延续你的工作流程。
Privacy & Trust
Browser-side comparison
Both text blocks stay local to the browser while the diff is computed, which is useful for private drafts and internal snippets.
Line-based output
This view compares lines, not words or characters. Small edits inside a single line show up as one removal and one addition instead of an inline highlight.
Great for quick reviews
The output is intentionally lightweight, so it works well for notes, copy drafts, and config changes without requiring a full Git diff workflow.
Export diff
Run a comparison first to enable export.
使用方法
粘贴或输入内容
在输入区域输入您的文字、代码或数据。
选择选项
选取要应用的转换方式或格式。
复制结果
一键将输出结果复制到剪贴板。
为什么使用此工具
100% 免费
没有隐藏费用，没有付费等级——所有功能完全免费。
无需安装
完全在浏览器中运行。无需下载或安装任何软件。
隐私且安全
您的数据永远不会离开您的设备。不会上传至任何服务器。
支持移动设备
完全响应式设计——在手机、平板或桌面电脑上均可使用。
Text Comparison and Diff Algorithms for Code Review
Key Takeaways
- Diff algorithms identify the minimum set of changes (insertions, deletions, modifications) between two text inputs.
- Side-by-side and unified diff views help developers quickly identify changes during code reviews and configuration audits.
- All text comparison happens entirely in your browser — your documents never leave your device.
Text comparison (diffing) is fundamental to software development, content management, and document review. From Git diffs and code reviews to comparing API responses and configuration files, understanding what changed between two versions of text is a daily task. Modern diff algorithms efficiently compute the minimum edit distance, presenting changes in an intuitive visual format.
The Myers diff algorithm, used by Git, runs in O(ND) time where D is the number of differences — optimal for similar texts.
Algorithm Efficiency
Common Use Cases
Code Review
Compare code versions to review changes before merging, identifying additions, deletions, and modifications across files.
Configuration Audit
Diff configuration files before and after deployment to verify only intended changes were applied to production environments.
API Response Comparison
Compare API responses between environments (staging vs. production) or between code versions to catch unexpected changes.
Content Revision Tracking
Compare document drafts to identify editorial changes, additions, and deletions during content review workflows.
Pro Tips
Use side-by-side view for large files and unified view for small, focused changes.
Trim trailing whitespace and normalize line endings before diffing to avoid noise from invisible formatting differences.
When comparing JSON or XML, format both inputs consistently first to ensure structural differences are not masked by formatting.
For configuration files, sort keys alphabetically before diffing to isolate actual value changes from reordering.
All text comparison is performed entirely in your browser. Your documents, which may contain sensitive code or business content, are never transmitted to any external server.