🔄 格式转换~18.1K 次搜索/月免费 · 无需注册
Base64 编码
即时将文本或 UTF-8 字符串编码为 Base64，完全在浏览器中完成，支持 Unicode。
如何使用此工具
- 1将文本粘贴或输入到上方输入框。
- 2结果即时更新。
- 3点击一下即可复制输出内容。
常见问题
使用此 Base64 编码工具处理敏感数据安全吗？+
是的。所有内容均通过 JavaScript 在浏览器本地处理——您的输入不会上传或存储到任何服务器。
我的数据安全吗？+
是的。本工具完全在浏览器中运行——您粘贴或输入的任何内容都不会上传到服务器。
教程与深度解析
Base64 Explained: What It Is and When to Use It
Learn what Base64 encoding is, why it adds 33% overhead, how data URIs work, the base64url variant, and exactly when to encode or decode — with worked examples.
Common JSON Errors and How to Fix Them
Trailing commas, single quotes, unquoted keys, BOM, NaN — learn what breaks JSON and how to fix each error fast with a free online formatter.
JWTs Explained: Header, Payload, Signature and Security Pitfalls
Learn how JSON Web Tokens work — the three parts, signing vs encryption, the alg=none attack, cookie vs localStorage, and expiry claims — with worked examples.
CSV to JSON: Handling Headers, Quotes and Nested Data
Master CSV to JSON conversion: RFC 4180 quoting rules, delimiter problems, type inference, and flattening nested JSON back to CSV — with worked examples.