文本差异对比
逐行对比两段文本并高亮差异。
关于「文本差异对比」
它属于「文本处理」分类：中文排版、编码转换、统计与内容检查。
完全免费、无需注册；所有处理都在浏览器本地完成，文件不会上传到任何服务器。
相关关键词：文本差异对比、文本处理、diff、对比、在线工具、免费
如何使用「文本差异对比」
- 打开工具：打开「文本差异对比」页面，无需注册、无需安装任何软件。
- 准备输入：准备好要处理的内容或文件：文本可直接粘贴，文件可拖入页面（本工具属于「文本处理」）。
- 填入内容：把内容粘贴进输入框，或把文件拖入页面；也可以点击「示例」先填入样例数据试一下。
- 设置选项并处理：按需调整页面上的选项，然后点击处理 / 转换 / 生成按钮。
- 获取结果：处理完全在浏览器本地完成，结果可直接复制或下载，文件不会上传到任何服务器。
常见问题
- 为什么修改一行会显示成一删一增？
- 这是行级对比的固有特点：算法只判断整行是否相同，内容有任何改动都会表现为删除旧行、新增新行。两行通常会相邻显示，便于对照。
- 能对比 Word 或 PDF 吗？
- 需要先把文字内容复制成纯文本再粘贴进来。本工具只处理文本，不解析文档格式与排版信息。
- 大文件会卡吗？
- LCS 算法的复杂度与两段文本的行数乘积相关，几千行以内很流畅。上万行的文件建议先截取关注的片段。
Text Diff (English)
Compare two texts line by line with highlights.
Belongs to “Text Tools”: Chinese typography, encoding conversion, statistics and content checks.
Free, no sign-up; everything runs locally in your browser and files are never uploaded.
Keywords: Text Diff, Text Tools, diff, compare, online tool, free
How to use it
- Open the tool：Open the “Text Diff” page — no sign-up and nothing to install.
- Prepare the input：Prepare the content or file to process: paste text or drop a file onto the page (this tool belongs to “Text Tools”).
- Provide the input：Paste your content into the input box or drop a file onto the page; you can also click “Sample” to try example data first.
- Adjust options and run：Adjust the options if needed, then click the process / convert / generate button.
- Get the result：Everything runs locally in your browser; copy or download the result — your files are never uploaded.
FAQ
- Why is an edited line shown as delete + add?
- This is inherent to line-level comparison: the algorithm only judges whether whole lines are equal, so any change appears as deleting the old line and adding a new one. The two lines usually display adjacently for easy comparison.
- Can it compare Word or PDF?
- Copy the text content into plain text first, then paste it here. This tool only handles text and does not parse document formats or layout.
- Will large files lag?
- LCS complexity is proportional to the product of the two texts’ line counts. A few thousand lines run smoothly; for tens of thousands of lines, trim to the relevant section first.
More tools in Text Tools
- Simplified ⇄ Traditional — Convert between Simplified and Traditional Chinese variants.
- Chinese to Pinyin — Convert Chinese to pinyin with tones, initials and polyphones.
- Letter Case Converter — Upper/lower/title/camel/snake case conversion.
- Circled Numbers & Letters — Convert digits and letters into circled Unicode chars.
- Mars Text Converter — Convert between plain text and "Mars" (stylized) text.
- Word & Char Counter — Count characters, Chinese chars, words, lines and reading time.
- Text Formatter — Clean blank lines, space CJK/English, unify punctuation.
- Dedupe & Sort Lines — Dedupe, sort, reverse and shuffle lines.
- RMB Amount in Words — Convert numeric amounts into Chinese capital letters.
- Banned Word Checker — Built-in e-commerce/content sensitive-word list, customizable.
- ID Card Info Extractor — Extract birthday, gender, region from an ID number and validate.
- Smart To-Do List — Local to-do list with priority and filtering.