Base64 Encoder/Decoder
Free Online Base64 Converter. Supports real-time bidirectional encoding and decoding between Text and Base64. Features URL-Safe format and full UTF-8 support. All processing is done securely in your browser.
Text (Input / Output)
Base64 (Input / Output)
Real-time Bidirectional Conversion
URL-safe Base64 Support (RFC 4648)
Full UTF-8 & Emoji Support
100% Client-side Security (No Uploads)
Learning Base64
What is Base64?
Base64 is a group of binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation. It uses A-Z, a-z, 0-9, +, and / characters.
Why use Base64?
It is commonly used when there is a need to encode binary data (like images or files) that needs to be stored and transferred over media that are designed to deal with textual data. This ensures that the data remains intact without modification during transport.
How does it work?
Base64 processing divides binary data into 6-bit chunks and maps each chunk to a character from the 64-character set. Padding characters ('=') are added at the end if the total number of bits is not divisible by 24.