Base64 Encoder / Decoder
What is Base64 encoding?
Base64 is a method of encoding binary data into text form. This allows data to be safely transmitted in systems that only support text — for example in URLs, HTTP headers or email messages.
Base64 encoding is commonly used in web applications, APIs and when transferring images or files in text format. The Base64 Encoder / Decoder tool lets you quickly encode text to Base64 or decode data back to its original form.
It can be useful for developers, DevOps specialists, security analysts and anyone working with data on the internet.
How Base64 encoding works
Base64 converts binary data into a set of 64 ASCII characters. The process involves dividing the data into groups of 6 bits and assigning characters from a defined alphabet.
This allows data to be safely transmitted over text protocols without the risk of corruption or formatting changes.
The example above is the text "Hello world" encoded in Base64. A Base64 decoder allows you to easily restore the original text.
Most common uses of Base64
- encoding data in URLs
- embedding images in HTML and CSS (data URI)
- HTTP Basic authorization
- transmitting data in APIs and JSON
- encoding attachments in MIME email messages
FAQ – Base64 Encoder / Decoder
Is Base64 encryption?
No. Base64 is not a method of encrypting or securing data. It is simply a way of encoding data into text format.
What is Base64 used for?
Base64 is used to transmit binary data in text-based systems, e.g. in emails, APIs, authorization tokens or images in data URI format.
Does Base64 increase data size?
Yes. Data encoded in Base64 is usually about 33% larger than the original binary data.
Is Base64 secure?
Base64 does not provide data security or confidentiality. Anyone can easily decode an encoded message.