Base64 Encode Decode

### About

Our online Base64 decode tool helps you convert data that has been encoded using the Base64 encoding scheme back to its original form. This tool is valuable for debugging and testing the decoding process, as well as for gaining a clearer understanding of how Base64 decoding works.

### How to Use This Base64 Decode Tool

1. Input your Base64 encoded data into the provided field.
2. Click the "DECODE" button.
3. The output will appear in a new field below the button.

**Example:** Enter the encoded string `YmFzZTY0IGRlY29kZXI=`, click the decode button, and you will receive `base64 decoder` as the output.

**Note:** If you have a large Base64 string (over 1MB), please use the Base64 to file tool to upload the data as a file for decoding.

### What is Base64?

Base64 refers to a specific MIME content transfer encoding. Essentially, Base64 is a set of related encoding schemes that represent binary information in ASCII format by converting it into a base64 representation.

### Types of URI Characters

Base64 encoding schemes are commonly used when there is a need to encode binary information that must be stored and transferred over media designed to handle textual information. This ensures that the data remains unchanged during transfer. Base64 is widely used in various applications, including electronic mail via MIME and storing complex information in XML.

The specific set of characters selected for the 64 characters required for Base64 can differ among implementations. The general approach is to choose a set of 64 characters that are part of a subset typical to most encodings. This combination ensures that the data is not altered during transmission through information systems, such as electronic mail, which may not be 8-bit clean. The Base64 implementation in MIME uses the characters a-z, A-Z, and 0-9 for the first 62 values, while other Base64 variations may use different symbols for the last two values.