Base64 Online Encoder/Decoder Tool
Online Base64 encoding and decoding, supporting text and file processing
Base64 is an encoding scheme that encodes binary data into ASCII characters, widely used for data transmission and storage.
Encode Mode
输入内容
输出结果
No results
Base64 Introduction
What is Base64
Base64 is an encoding method based on 64 printable characters to represent binary data. It encodes 3 bytes of binary data into 4 bytes of ASCII characters.
How it Works
Base64 groups binary data by 6 bits, each group is converted to a printable ASCII character. Encoded data is approximately 33% larger than original data.
Base64 Character Set
Base64 uses A-Z, a-z, 0-9, +, / these 64 characters, and = as padding character.
Padding Mechanism
When input data length is not a multiple of 3, = characters are used for padding to ensure output length is a multiple of 4.
Features
Supports Base64 encoding and decoding to meet different usage scenarios
Supports upload, encoding, decoding and download of text and files
Automatic input format validation to ensure safe and reliable operations
Usage Instructions
Select operation mode (encode or decode)
Enter text to process or upload file
Click encode or decode button
View processing results
Copy or download results
Application Scenarios
Transmit binary attachments in email
Embed images and data in HTML and CSS
Transmit binary data in JSON
Store binary data in databases
Securely transmit sensitive data in URLs
Store binary information in configuration files