Base64 Encoder / Decoder
Encode or decode Base64 text in the browser with no upload.
Encode text to Base64 or decode it back when you need to inspect API payloads, URLs, or encoded data quickly.
What is this tool?
Base64 is a binary-to-text encoding used to represent data in a format that is safe for transmission in text-based systems. It is common in web APIs, email attachments, and certain URL or token workflows. Base64 is not encryption: it is just a way to convert content into an ASCII-safe representation.
Example
Plain text
Original value
Hello World
Base64 output
Encoded string
SGVsbG8gV29ybGQ=
Why use Cassidor?
- Useful when inspecting or preparing encodings for web requests.
- Runs locally in the browser with no upload requirement.
- Fast for small debugging and transformation tasks.
Frequently asked questions
Is Base64 encryption?
No. Base64 encodes data for safe transport in text-based systems; it does not encrypt or protect the content.
What is Base64 used for?
It is commonly used in web APIs, data URIs, JWTs, and some transport or encoding workflows.
Can Base64 encode binary data?
Yes, Base64 can represent bytes in a text-safe format, although many developer tools are mainly used for text and small payloads.
Is it safe for passwords?
No. Base64 is not a password hashing or encryption scheme and should not be used as a security control.
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