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Encode text or a whole file, decode anything you paste. Most Base64 tools call the browser’s btoa() and quietly corrupt the first non-Latin character; this one goes through UTF-8 properly, and tells you honestly when decoded bytes aren’t text at all.
Options
Type or paste text, or encode a file instead.
Paste into the editor or open a file — everything you add stays in this tab, and you see exactly what the tool will work on before anything runs.
Your browser does all the work locally. Nothing is uploaded — what you paste never leaves this tab, so there’s nothing for anyone to store, scan, or leak.
Take the result to your clipboard or save it as a file. Close the tab and nothing of what you pasted remains.