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Encode text and files to Base64, or decode Base64 back — in your browser
Encode text or files to Base64, or decode Base64 back to text and files. Runs entirely in your browser.
Work with typed text, or drop any file up to 5 MB.
Convert text to Base64, decode Base64 to text, or move between files and Base64.
Copy the result, or download the decoded bytes as a file.
Encoding uses the browser TextEncoder (UTF-8) with chunked binary-string conversion so large inputs do not overflow the call stack. Decoding validates the Base64 alphabet and padding before converting back to bytes.
Unlike legacy online converters that transmit entire files to third-party cloud servers, our architecture prevents network bottlenecks, provides near-instant processing, and eliminates cloud wait queues.
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