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🧾 文件哈希校验File Checksum (MD5/SHA-256)
在线计算文件的 MD5、SHA-1、SHA-256、SHA-512 校验值，文件不上传，可比对下载文件是否被篡改。Calculate MD5, SHA-1, SHA-256 and SHA-512 checksums of any file locally — verify downloads.
使用说明与常见问题How-to & FAQ
「文件哈希校验」是什么？What is the File Checksum (MD5/SHA-256)?
在线计算文件的 MD5、SHA-1、SHA-256、SHA-512 校验值，文件不上传，可比对下载文件是否被篡改。Calculate MD5, SHA-1, SHA-256 and SHA-512 checksums of any file locally — verify downloads.
如何使用「文件哈希校验」？How do I use the File Checksum (MD5/SHA-256)?
在「文件哈希校验」中，在上方填写或选择所需内容，结果会实时显示在下方；所有处理都在浏览器本地完成。In the File Checksum (MD5/SHA-256): Fill in or choose the options above and the result appears below instantly; everything runs locally in your browser.
文件会上传吗？Is my file uploaded?
不会，文件在浏览器中读取并计算哈希，适合校验大文件下载。No. The file is read and hashed in your browser.
编码和加密有什么区别？Is encoding the same as encryption?
编码（如 Base64、URL 编码）可直接还原，不提供保密性；加密需要密钥。「文件哈希校验」的处理全部在本地完成。No. Encoding (Base64, URL…) is reversible by anyone; encryption needs a key. The File Checksum (MD5/SHA-256) works fully offline in your browser.
「文件哈希校验」免费吗？需要注册吗？Is the File Checksum (MD5/SHA-256) free? Do I need an account?
「文件哈希校验」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The File Checksum (MD5/SHA-256) is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.