Base64 Encode/Decode
Encode text to Base64 or decode Base64 back to UTF-8 safely in your browser. No uploads, no logging and no server-side processing.
🔒 Runs entirely in your browser — nothing is uploadedWhat Base64 Encode/Decode does
Base64 Encode/Decode converts normal text into Base64 and converts Base64 back into readable UTF-8. Developers often meet Base64 in data URIs, Basic authentication headers, email formats, small binary payloads, and examples copied from API documentation. The widget wraps the browser btoa and atob behavior with TextEncoder and TextDecoder so emoji, accents, Cyrillic, and other Unicode text round-trip correctly.
This page is designed for everyday developer work: quick checks while debugging, preparing small examples for documentation, and cleaning up data before pasting it into an editor, terminal, issue, or test fixture. The interface keeps the input, controls, output, and status message close together so the result is easy to verify before you copy it.
Private browser-based workflow
All processing happens with in-browser JavaScript. The tool does not upload your text, tokens, URLs, snippets, or generated values to a server, and it does not require an account. That privacy model is important because small utilities often receive real API responses, configuration samples, logs, authentication data, or customer-shaped examples during troubleshooting. Keeping the work local reduces risk and also makes the tool feel instant because there is no network round trip.
Practical tips
Remember that Base64 is not encryption. Anyone with the string can decode it, so do not use it to hide secrets. If you are decoding a data URI, remove the prefix and paste only the encoded section. Whitespace in encoded input is ignored to make copied multiline strings easier to inspect.
Always review transformed output before relying on it in production. Browser utilities are excellent for inspection and preparation, but they cannot understand every project convention or security requirement. If the result will be committed, shared publicly, or used in an authentication flow, double-check that it contains no secrets and that it matches the format expected by your application.
How to use
- Paste textEnter plain text to encode or Base64 to decode.
- Run conversionChoose Encode or Decode depending on the direction.
- Copy outputCopy the result or move it back to the input.