Runs locally
Base64 Decode
Decode Base64 strings back into readable text instantly.
Input is processed in your browser and is not uploaded.
Output
Results appear here.Add input to see a result.
Use this Base64 decoder to inspect encoded strings from APIs, headers, tokens, and configuration values. Invalid Base64 is reported clearly without uploading data. Lightweight, mobile-friendly, and built for quick repeat use.
FAQ
What can I decode with this tool?+
You can decode Base64 strings that represent text, including UTF-8 text.
Why does decoding fail?+
The input may include invalid characters, missing padding, or binary data that is not readable text.
Is Base64 decoding private?+
Yes. Decoding is done locally in your browser.