Base64 Decoder
Decode Base64 strings back to plain text instantly. Free, fast, and secure client-side Base64 decoding tool for developers.
About Base64 Decoder
Do you have a Base64 string that you need to read? Our Base64 Decoder instantly reverses Base64 encoded payloads back into human-readable plain text. Simply paste your string and our tool will decode it locally in milliseconds.
What is Base64 Decoding?
Base64 Decoding is the reverse process of Base64 encoding. It takes an ASCII string built from the Base64 alphabet and translates it back into its original binary or text format. This is commonly used in decoding JWT payloads or email attachments.
Frequently Asked Questions
Why is my Base64 string not decoding?
Ensure your string does not contain spaces or invalid characters. Standard Base64 strings only contain A-Z, a-z, 0-9, +, /, and = (for padding).
Is my decoded text saved anywhere?
No, our tools operate strictly on the client-side. Your secrets and tokens remain private in your browser session.
Can it decode JSON?
Yes, if a JSON object was encoded into Base64 (like the body of a JWT), decoding it will reveal the original JSON string.