Base64编码器解码器
Encode text to Base64 and decode Base64 text online while reviewing padding, Unicode, and transport-safe output. 简体中文 locale.
Make HTML structure easier to inspect
This tool converts text to Base64 and decodes Base64 back to text. Base64 represents bytes with a limited ASCII alphabet s...
Formatting is not HTML validation
Base64 maps groups of input bytes to printable characters and may use padding at the end. The result depends on the chosen...
How to format HTML
- Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
- Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
Formatting method
- Read markup structure
The encoder reads bytes, groups them into six-bit values, maps those values to the Base64 alphabet, and adds padding when ...
- Apply indentation
The encoder reads bytes, groups them into six-bit values, maps those values to the Base64 alphabet, and adds padding when ...
- Preserve content
The encoder reads bytes, groups them into six-bit values, maps those values to the Base64 alphabet, and adds padding when ...
Exact parser recovery, optional-tag handling, whitespace policy, embedded-language behavior, and error wording should be c...
Read the formatted result
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
常见错误
Common mistakes include treating Base64 as encryption, decoding a URL-safe value with the standard alphabet, changing padd...
Common mistakes include treating Base64 as encryption, decoding a URL-safe value with the standard alphabet, changing padd...
限制和特殊情况
This converter does not encrypt, sign, compress, identify a file type, or verify trust. Very large inputs may be unsuitabl...
This converter does not encrypt, sign, compress, identify a file type, or verify trust. Very large inputs may be unsuitabl...
Examples
Base64 Encoder Decoder online — 1
Is Base64 encryption?
Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
Base64 Encoder Decoder online — 2
Does encoding reduce size?
Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
Base64 Encoder Decoder online — 3
How is Unicode handled?
Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
Base64 Encoder Decoder online — 4
What does equals padding mean?
Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
Base64 Encoder Decoder online — 5
Can I decode a data URI?
Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
Base64 Encoder Decoder online — 6
Is URL-safe Base64 different?
Choose encode or decode, enter the source, run the conversion, and inspect the result. For text, confirm the intended char...
A successful round trip returns the same text or bytes when the same encoding and alphabet are used. A different length is...
Frequently asked questions
Is Base64 encryption?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
Does encoding reduce size?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
How is Unicode handled?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
What does equals padding mean?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
Can I decode a data URI?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
Is URL-safe Base64 different?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
Does decoding verify authenticity?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...
Can I use it for passwords?
No. Base64 is reversible representation. Use encryption, signatures, transport rules, and secure secret handling when conf...