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

  1. 1
    Paste input
    Type or paste — the conversion runs as you type.
  2. 2
    Read output
    Updates live, with errors flagged if input is invalid.
  3. 3
    Copy
    Click 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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