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英文字母大小写转换器

一键转换大写、小写、标题大小写、camelCase 和 snake_case，支持导出 PDF。

100% in-browser processing • Instant client-side conversion • Zero cloud storage • Clean PDF export.

继续使用工具登入

How to convert text case in 3 steps

  1. 1

    Paste or type your text

    Enter any text or document excerpt into the editor. Live statistics display character and word counts instantly.

  2. 2

    Choose your desired case style

    Click any button: Sentence case, UPPER CASE, lower case, Title Case, camelCase, PascalCase, snake_case, or kebab-case.

  3. 3

    Copy or export clean document

    Copy transformed text with one click, download as a .TXT file, or export a formatted A4 PDF.

Why use DocMate Case Converter

  • Instant 1-Click Transformations

    Change capitalization across thousands of words simultaneously without manual re-typing or formatting errors.

  • Developer & Code Format Support

    Easily convert strings into programming conventions including camelCase, PascalCase, snake_case, CONSTANT_CASE, and URL slugs.

  • 100% Client-Side Privacy

    Your text is processed entirely within your browser memory. Nothing is ever logged or transmitted to an external server.

  • Branded PDF & TXT Exports

    Generate ready-to-share PDF documents complete with word count statistics and clean typography.

Frequently asked questions

What is the difference between Title Case and Sentence Case?
Title Case capitalizes the first letter of each major word while keeping short conjunctions and prepositions lowercase (e.g. 'The Old Man and the Sea'). Sentence case capitalizes only the first letter of the first word in each sentence and proper nouns.
Can I convert text into programmer casing like camelCase or snake_case?
Yes! DocMate includes dedicated conversion algorithms for camelCase (e.g. 'userId'), PascalCase ('UserId'), snake_case ('user_id'), and kebab-case ('user-id').
Is my text saved or stored on any server?
No. All text parsing and manipulation occurs purely inside your browser using client-side JavaScript. Your text never leaves your device.
如何在保护隐私的同时保存我的活动日志？
默认情况下，您的活动历史记录仅保存在您的设备本地。如果您选择启用云同步，记录将被加密并严格绑定到您的帐户。

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Transform text case, fix accidental caps lock, and export clean documents in seconds.

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