ChistStudioWhat Base64 is used for
Base64 turns arbitrary bytes into a string made only of letters, digits, and a few symbols, which is safe to embed inside text formats that would otherwise choke on raw binary — think of an image attached inline to an email, an API key embedded in a config file, or binary data packed into a JSON field.
When to use this tool
Reach for this whenever you're debugging an API that returns Base64-encoded payloads, need to quickly inspect what's inside a JWT's encoded segments, or have to hand-craft a Basic Authentication header, which itself is just a Base64-encoded "username:password" string.
Frequently asked questions
What is Base64 encoding?
Base64 represents binary or text data using 64 printable ASCII characters. It's commonly used to embed binary data such as images or files in text-based formats like JSON, XML, or email.
Is Base64 encoding the same as encryption?
No. Base64 provides no confidentiality — anyone can decode it back to the original with no key required. Never rely on it to protect sensitive data.
Why does Base64 output end with = signs sometimes?
The = character is padding, added when the input length isn't a multiple of 3 bytes, so the output splits evenly into 4-character groups.