How to use
- Paste text or Base64 into the input area.
- Click Encode or Decode.
- Copy the result.
Text
Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text. Supports UTF-8.
Base64 is a binary-to-text encoding scheme defined in RFC 4648. It represents arbitrary binary data using 64 printable ASCII characters (A–Z, a–z, 0–9, + and /), making it safe to embed images in HTML/CSS, attach files to emails (MIME), or carry binary payloads inside JSON and XML. Encoded output is roughly 33% larger than the input. This tool encodes and decodes UTF-8 text entirely in your browser.
FAQ
Is Base64 encryption?
No. Base64 is an encoding, not an encryption scheme — it uses no key and is trivially reversible by anyone. Never use Base64 to protect passwords, tokens or other secrets; it only changes how data looks, not who can read it.
Why does my Base64 string end with = or ==?
Base64 processes input in 3-byte groups and emits 4 characters per group. When the input length is not a multiple of 3, one or two = characters are appended as padding so the output length stays a multiple of 4.
What is Base64URL?
Base64URL is a URL-safe variant defined in RFC 4648 §5: + becomes -, / becomes _, and padding is usually omitted. It is used wherever Base64 appears in URLs or filenames — most notably in JSON Web Tokens (JWT).
Can Base64 encode non-English text?
Base64 itself encodes bytes, not characters, so any text works as long as a character encoding is chosen first. This tool converts text to UTF-8 before encoding, which covers every language, emoji and symbol.