Base64 Decoder
Decode Base64-encoded text in your browser. Full UTF-8 support. Nothing uploaded.
100% in your browser — files never uploaded.
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How to use the Base64 Decoder
- 1Paste inputType or paste — the conversion runs as you type.
- 2Read outputUpdates live, with errors flagged if input is invalid.
- 3CopyClick Copy or select the output to copy.
About this tool
Base64 is a way to represent binary or non-ASCII text using only printable ASCII characters. Most APIs, emails and data: URIs use it for embedding data.
This decoder handles standard Base64 (with or without padding) and decodes UTF-8 properly so emoji and non-Latin text come back unchanged.
Frequently asked questions
UTF-8?
Yes — decoded bytes are interpreted as UTF-8.
Padding?
Optional — `=` padding is accepted but not required.
Browser-only?
Yes.
Mobile?
Yes.
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