Base64 Decoder
Decode a Base64 string back into readable text.
Your file never leaves this browser tab — everything runs locally on your device.
How to use base64 decoder
- Paste the Base64 string you want to decode.
- Click "Decode from Base64".
- Copy or download the decoded text.
Common use cases
- Reading the contents of a Base64-encoded token, header or config value.
- Checking what a piece of encoded data actually contains while debugging.
- Decoding a value copied from an API response or log file.