Base64 Encoder & Decoder
Encode UTF-8 text as standard or URL-safe Base64, and decode Base64 back to readable text entirely in your browser.
Encode or decode text
ReadyWhat Base64 does
Base64 represents bytes using ordinary text characters so data can travel through text-based systems. It is an encoding format, not encryption: anyone with the encoded value can decode it.
Text and compatibility limits
This tool converts UTF-8 text, not uploaded files or arbitrary binary data. The decoder accepts standard and URL-safe Base64, ignores whitespace, and reports malformed input or bytes that are not valid UTF-8 text.
How to use it
Paste or type UTF-8 text, choose standard Base64 or URL-safe Base64 for encoding, then select Encode. To decode, paste standard or URL-safe Base64 and select Decode. Copy the result when it is ready.
Privacy
Encoding and decoding happen entirely in your browser. Text entered here is not submitted to or stored by Muft. Avoid pasting secrets into any tool on a device you do not trust.
Tool behavior last checked Aug 9, 2026.