Encode and decode Base64.

Base64 turns up everywhere in development, from data URIs and API tokens to email attachments and config values. The tool above converts in both directions, and it routes text through UTF-8 rather than the browser's raw btoa, so accented characters and emoji come back intact instead of failing outright. File mode encodes any file up to 1 MB. All of it happens in the page you are already on, so nothing is uploaded and nothing is logged.

Base64 is often a step inside a bigger task. If you're decoding a token, it's quicker to peek inside a JWT with the purpose-built tool. If you're working with encoded JSON, you can clean up minified JSON so the result is readable.

When you need to share the output rather than just read it (say, a decoded file or a config dump), you can put any file online and send a link. The rest of NudgeHost's small dev utilities live alongside this one.

None of the tools here need an account, and this one is no exception. Hosting is the paid side of NudgeHost, and you can share a file now whenever a decoded file needs to reach someone.