Encode text to Base64, or decode Base64 back to text, instantly in your browser.
Base64 encodes binary data into ASCII text so it can travel safely in places that only accept text — URLs, emails, config files, data URIs.
Use Encode to turn text into Base64, and Decode to turn it back. Everything runs locally in your browser; nothing is uploaded.
Base64 is often used to wrap sensitive strings — API keys, auth tokens, credentials stored in config files. Many "free" online Base64 tools process your text on a server, which means what you paste is uploaded, parsed in the cloud, and sometimes logged.
Jisubao is different. Encoding and decoding run 100% in your browser, on your own device. Nothing is uploaded, nothing is stored, nothing is logged. Paste a secret config or a token — it stays on your machine.
Note: Base64 is encoding, not encryption — anyone who sees the output can decode it. So keep the result private; just don't hand it to a server-side tool unnecessarily.