Base64 Encode Unicode Text — UTF-8 Safe Encoding
Quick Answer: This encoder properly handles Unicode by first converting text to UTF-8 bytes, then Base64-encoding those bytes. This ensures emoji, accented characters, CJK text, and other non-ASCII content encode and decode correctly.
FAQ
Why does Unicode need special handling in Base64?
JavaScript btoa() only handles Latin-1 characters. Unicode text must first be encoded to UTF-8 bytes (via TextEncoder) before Base64 encoding.
How do I decode Unicode Base64 in JavaScript?
Use: new TextDecoder().decode(Uint8Array.from(atob(base64), c => c.charCodeAt(0))). Or use the Buffer class in Node.js.