Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 to text.
Input
Enter the text you want to encode to Base64.
Output
Encoded Base64 result.
Using Base64 Encoder and Decoder for open banking
Encode and decode Base64 text when inspecting API payloads and authentication examples.
Sandbox example and expected result
Encode sandbox:client to c2FuZGJveDpjbGllbnQ=, then decode it to confirm the original text.
Limitations and troubleshooting
Base64 is not encryption. This tool uses browser btoa/atob: arbitrary Unicode needs byte encoding first, and JWT Base64url is a different alphabet.
Where your input is processed
Encoding and decoding run in your browser. Use synthetic test data.
Maintained by OpenFinanceTools. Guidance updated 23 October 2026. Testing and editorial approach