Base64 Encode / Decode
Free online Base64 encoder and decoder. Convert text to Base64 or decode Base64 back to plain text, with full UTF-8 support — all in your browser, nothing uploaded.
Base64 is an encoding that represents binary or text data using only printable ASCII characters. It's everywhere in web development — embedding images in CSS, sending credentials in HTTP headers, packing data into JSON or URLs that can't carry raw bytes. This tool encodes any text to Base64 and decodes it straight back.
Crucially, the conversion is UTF-8 safe, so emoji, accented letters, and non-Latin scripts round-trip correctly instead of getting mangled. Paste your text, choose Encode or Decode, and copy the result. If you try to decode something that isn't valid Base64, you'll get a clear error message. All processing stays in your browser.
Frequently asked questions
Does this handle emoji and non-English text?
Yes. Encoding and decoding are UTF-8 aware, so characters outside basic ASCII — emoji, accents, CJK, and more — convert correctly in both directions.
What happens if I decode invalid Base64?
If the input isn't valid Base64, the tool shows an error message instead of garbled output, so you know the string is malformed.
Is Base64 encryption?
No. Base64 is encoding, not encryption — anyone can decode it. Use it for safe data transport, not for keeping secrets.
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