Does my data leave this browser?

No. Everything here runs locally in this tab - nothing is uploaded, logged, or sent to a server.

Does this handle special characters and emoji?

Yes - text is encoded as UTF-8 before Base64 conversion, so accented letters, symbols, and emoji round-trip correctly.

Dev tool studioPrivate on this device

Encode text to Base64 or decode it back instantly

Does my data leave this browser?: No. Everything here runs locally in this tab - nothing is uploaded, logged, or sent to a server.
Does this handle special characters and emoji?: Yes - text is encoded as UTF-8 before Base64 conversion, so accented letters, symbols, and emoji round-trip correctly.