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Base64 Decoder

Decode Base64 back to readable text.

Runs entirely in your browser. Nothing you enter is uploaded or stored.

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How to use the Base64 Decoder

  1. Paste the Base64 string.
  2. The decoded text appears underneath.
  3. If it is not valid Base64 you will be told rather than given nonsense.

Questions people ask

Why does my string not decode?

Usually whitespace or line breaks from copying, a URL-safe variant that uses - and _ instead of + and /, or missing = padding at the end. This decoder handles all three, so anything it rejects is genuinely not Base64.

Can I decode an image or a file?

This tool decodes Base64 back to text. A Base64 image will decode to binary that is not readable as text — use an image tool for that.

Related tools

Base64 EncoderTurn text into Base64, with full Unicode support.URL DecoderRead a percent-encoded link as plain text.JSON FormatterFormat, minify and check JSON, with the error pointed at the line.URL EncoderMake text safe to drop into a URL or a query string.