Base64 encoder / decoder
Encode text to Base64 or decode it back, with UTF-8 and URL-safe support.
Text
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Base64
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How it works
- Drop a file into the upload area, or paste your content into the input box.
- Choose the output format and options, then start the conversion.
- Download the result — everything runs in your browser and nothing is uploaded.
Frequently asked questions
Do Chinese text and emoji survive encoding?
Yes. Everything is encoded and decoded as UTF-8, so Chinese and emoji come back intact; invalid Base64 returns a clear error. This tool only handles text.
Do my files get uploaded to a server?
No. All 12 tools run inside your browser, so files never leave your device. Closing the tab ends the session.