Code & Data Utilities
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 to text with full UTF-8, Korean, and Emoji support.
🛡️ All data is processed strictly in your browser and never sent to any server (Zero-Log).
Input (Plain Text)
Output (Base64)
How Base64 Encoding Works
Base64 converts binary data into an ASCII string format by translating it into a radix-64 representation using 64 safe printable characters (A-Z, a-z, 0-9, +, /).
Standard Base64 vs. URL-Safe Base64
Standard Base64 contains + and / which are special characters in URL parameters. URL-Safe Base64 substitutes + with - and / with _, omitting padding (=) for clean HTTP transmission in JWTs and queries.