Base64 encoding turns arbitrary text or binary data into a safe, text-only representation. This encoder/decoder is UTF-8 aware and runs entirely client-side.
Why Base64 exists
Many systems — email, URLs, JSON — are designed for text, not raw bytes. Base64 maps every 3 bytes to 4 printable characters, letting binary data travel safely through text-only channels. That's why data URIs and JWTs use it.
Encoding is not security
Because Base64 is fully reversible with no key, it offers zero protection. It's for compatibility, not confidentiality — use real encryption for anything sensitive.
Frequently asked questions
Base64 is a way of representing binary data using 64 printable ASCII characters. It's used to embed images in HTML/CSS, encode data in URLs and tokens, and send binary safely over text-based protocols.
Yes. This tool is UTF-8 safe, so characters beyond basic ASCII — accents, emoji, non-Latin scripts — encode and decode correctly.
No. Base64 is encoding, not encryption — anyone can decode it. Never use it to protect secrets.