Encoding
Base64 Decode
Decode Base64 back to readable text.
Encoding
Base64 Encode
Convert plain text into Base64, the encoding used to embed binary or arbitrary data inside URLs, JSON values, JWTs, and HTTP headers without breaking the surrounding format.
工具摘要
此工具接收结构化输入，在浏览器中返回确定性输出，无需上传到服务器。
- 工具名称
- Base64 Encode
- 输入意图
- 提供需要转换、校验或分析的原始内容。
- 输出意图
- 获得可直接复制、复用或排错的规范化输出。
- 示例输入
- Hello, world
- 示例输出
- SGVsbG8sIHdvcmxk
Base64 output will appear here after you click Encode.
工具介绍
Convert plain text into Base64, the encoding used to embed binary or arbitrary data inside URLs, JSON values, JWTs, and HTTP headers without breaking the surrounding format.
工具概览
Base64 represents arbitrary bytes using only 64 ASCII characters (A–Z, a–z, 0–9, +, /, plus = padding). It exists because many transports — HTTP headers, JSON strings, URLs, email — assume printable text. Encoding makes any input safe to drop into those contexts; decoding reverses the operation. Base64 is encoding, not encryption: anyone with the encoded string can decode it.
使用场景
- Use Base64 Encode when you need fast encode plain text into base64.
- Handle encoding workflows directly in the browser with no install required.
- Support SEO long-tail intent by covering quick checks, troubleshooting, and one-off conversions.
输入/输出示例
输入意图
Hello, world
输出意图
SGVsbG8sIHdvcmxk
常见问题
Does Base64 encrypt my data?+
No. Base64 is a reversible encoding, not encryption. Anyone with the Base64 string can decode it.
Why is the output about a third larger than the input?+
Base64 packs every three bytes of input into four output characters, so the output grows by roughly 4/3.
What characters does Base64 use?+
Standard Base64 uses A–Z, a–z, 0–9, plus + and /, with = as padding so the output length is a multiple of four.
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