Base64 Encoder & Decoder
Encode text to Base64, or decode a Base64 string back to plain text. Runs entirely in your browser.
What is Base64?
Base64 is a way of representing binary or text data using only 64 printable characters (A-Z, a-z, 0-9, +, /). It's not encryption — anyone can decode it instantly — but it's useful for safely embedding data in places that only accept plain text, like URLs, JSON, or email attachments.
Common uses
- Embedding small images directly in HTML or CSS as a data URL
- Passing binary-ish data through systems that only handle text, like some APIs
- Quickly inspecting what a Base64 string in a config file or token actually says
Frequently asked questions
Is Base64 the same as encryption?
No — Base64 is just a different way of representing the same data as plain text characters. Anyone can decode it instantly; it provides no security or privacy on its own.
Why did decoding fail with an error?
The input wasn't valid Base64 — often caused by extra whitespace, line breaks, or characters outside the standard Base64 alphabet (A-Z, a-z, 0-9, +, /, and = for padding).