Encode and decode Base64 without breaking Unicode.
Convert UTF-8 text to standard Base64 and URL-safe Base64 in this browser tab.
Conversion input
Base64 output
text
Processed locally — inputs and results stay in this browser tab. Copy and download actions run only when you choose them.
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What this tool checks
Encoding starts from UTF-8 bytes. Decoding normalizes the URL-safe alphabet and rejects input the browser cannot decode.
- Base64 is an encoding, not encryption.
- URL-safe output omits padding.
- Binary data may not decode as valid text.
Signalbench
Inspect, transform, and debug data without sending it away.