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Free Developer Tool

Base64 Encoder and Decoder

Convert text to Base64 and back, with full Unicode support. Everything stays in your browser.

100% Free No signup Runs in your browser No uploads
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Base64 is encoding, not encryption. Anyone can decode it, so never use it to hide passwords or secrets.

Frequently asked questions

What is Base64 actually for?

Base64 packs binary data into plain text for emails, data URLs and API payloads. It is an encoding, not encryption, so it provides no secrecy.

Does it handle emoji and non-English text?

Yes. The tool encodes through UTF-8 first, so emoji, accented characters and other scripts round-trip correctly.

Why does decoding sometimes fail?

Decoding fails when the input is not valid Base64, usually from typos, line breaks in the wrong place, or pasting text that was never encoded.

Preview

Base64 Encoder and Decoder tool preview
Live preview of the Base64 Encoder and Decoder tool running in your browser. Your data never leaves your device.

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