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Base64 Encode/Decode

Encode and decode Base64, UTF-8 safe.

How it works

  1. 1Choose Encode or Decode.
  2. 2Paste your input.
  3. 3Copy the result.

Use cases

  • Embed small assets in source code
  • Decode Authorization headers
  • Transport binary data in JSON

Frequently asked questions

Why is base64 longer than the input?

Base64 encodes 3 bytes into 4 characters, growing the size by ~33%.

Read the guide
Base64 explained, and when you actually need it
Base64 is not encryption. It is not compression. Here is what it actually is and the five real-world use cases that justify it.

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