Base64 Input
Decoded Output
About Base64 Decoding
This tool decodes Base64 encoded strings back to their original text format. Base64 is commonly used to encode binary data into text format for transmission or storage.
Example
Base64: SGVsbG8gV29ybGQ=
Decoded: Hello World
Common Uses
- Decode Base64 encoded API responses
- Extract data from data URLs
- Decode email attachments
- Read Base64 encoded configuration data
- Debug Base64 encoded strings in development
Frequently Asked Questions
What is Base64 decoding?
Base64 decoding is the process of converting a Base64 encoded string back to its original binary or text format. This reverses the Base64 encoding process to recover the original data.
How can I tell if text is Base64 encoded?
Base64 strings typically contain only letters A-Z, a-z, numbers 0-9, plus signs (+), forward slashes (/), and often end with one or two equal signs (=) as padding. The length is usually a multiple of 4.
Why does Base64 decoding sometimes fail?
Decoding can fail if the input is not valid Base64, contains invalid characters, has incorrect padding, or if the string has been modified. Base64 requires proper formatting to be decodable.
Is Base64 decoding secure?
Base64 decoding itself is safe, but be cautious when decoding strings from untrusted sources, as they might contain malicious content that could be harmful when processed by your application.