What is a Base64 Encoder / Decoder?
Base64 turns arbitrary bytes into a safe ASCII string, which is why it appears everywhere: basic auth headers, data URIs, email attachments, JWT segments and config files.
This tool encodes and decodes with proper UTF-8 handling, so emoji and non-Latin text survive the round trip — a common failure of naive implementations.
How to use the Base64 Encoder / Decoder
- Paste text into the input.
- Press Encode (text → Base64) or Decode (Base64 → text).
- Copy the result with one click.
Frequently asked questions
Is Base64 encryption?
No — it is encoding, freely reversible by anyone. Never treat Base64 as a way to hide secrets.
Why does Base64 make data bigger?
It represents every 3 bytes as 4 characters, so output is ~33% larger than input. That is the price of being ASCII-safe.
Does the tool handle emoji and non-English text?
Yes — text is encoded as UTF-8 bytes first, so any Unicode text round-trips correctly.
What is Base64URL?
A URL-safe variant using - and _ instead of + and /. The decoder accepts both.