Encode UTF-8 plain text into Base64 format or decode Base64 strings back to readable text securely in your browser.
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-64 representation. Every 3 bytes (24 bits) of source data are partitioned into four 6-bit numbers, each mapped to one of 64 printable characters:
Because 3 bytes become 4 characters, Base64 encoding inherently increases data volume by approximately 33.3%. It is designed for safe transmission through legacy email protocols and URL headers, not data compression.
Input: SmartToolkit
Binary representation (12 bytes) → mapped to 16 Base64 characters:
Result: U21hcnRUb29sa2l0
Encode query parameters and URI components into percent-encoded ASCII or decode URLs back into readable characters.
Prettify, minify, validate, and fix JSON documents in your browser with clear syntax error highlighting and line location.
How Base64 binary-to-text encoding works. Understand why it inflates file sizes by 33%, data URI images, email MIME standards, and performance.
How to diagnose and fix JSON syntax errors. Understand unexpected tokens, trailing commas, single quote mistakes, and proper JSON schema validation.