Key takeaways
- Base64 converts binary or text data into a string of letters, numbers and a few symbols — it's an encoding, not encryption.
- It's commonly used to embed images in CSS/HTML, send binary data over text-only protocols like email (MIME), and in some API tokens.
- Anyone can decode Base64 instantly — it provides no security or privacy on its own.
- Base64 Decoder encodes and decodes text in your browser, with no upload involved.
The most common mix-up
Base64 text looks scrambled, which leads people to assume it's some form of security — it isn't. It's a reversible encoding scheme designed to represent binary data using only printable characters, nothing more. Anything encoded in Base64 can be decoded instantly by anyone with a decoder like this one.
If you need to actually protect data, that's encryption (a password-protected PDF, for instance) — not Base64.
Encoding or decoding text
Open Base64 Decoder, paste your text, and switch between encode and decode — the result updates instantly as you type.
Frequently asked questions
Why does Base64 text end with = signs sometimes?
Those are padding characters, added when the input length isn't a clean multiple of 3 bytes — it's normal and part of the standard, not an error.
Can I Base64-encode an image here?
This tool is built for text — for encoding image files specifically, see [Image to Base64](/image-to-base64).