Base64

Base64 shows up constantly in developer work — encoded tokens, embedded images in data URIs, binary payloads inside JSON — and reading or producing it by hand is not realistic. Base64Bot handles the conversion both ways: send it plain text to get its Base64 encoding, or send Base64 to see the decoded content, based on its title and function.

Its appeal is the same as the other small formatting utilities in this list: no browser tab, no extension, just a message to a bot already open on a phone or desktop. For a one-off check — what does this JWT payload segment actually say, or what does this data: URI decode to — it removes the friction of finding and trusting a random web-based converter.

As with any bot handling arbitrary text you paste in, avoid sending anything sensitive like production credentials or private keys through it, since there is no published data-handling policy.