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Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 strings instantly.

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What is the Base64 Encoder / Decoder?

The Base64 Encoder/Decoder converts text to Base64 encoding and back. Base64 is a binary-to-text encoding scheme used extensively in web development for embedding data in HTML, transmitting data in URLs, and encoding authentication credentials.

Our tool supports full UTF-8 text, meaning it correctly handles special characters, emojis, and non-Latin scripts. The encoding and decoding happen entirely in your browser — no data is ever transmitted to external servers.

How to Use This Base64 Encoder / Decoder

Encode or decode Base64 in three steps:

  1. Select 'Encode' to convert text to Base64, or 'Decode' to convert Base64 back to text.
  2. Enter your text or Base64 string in the input area.
  3. Click the Encode/Decode button to see the result instantly.
  4. Copy the output with the Copy Result button.

Common Use Cases for Developers

Base64 encoding is used throughout web development:

  • Data URIs: Embed small images directly in HTML/CSS using Base64-encoded data URIs.
  • API Authentication: Encode credentials for HTTP Basic Authentication headers.
  • Email Attachments: MIME encoding uses Base64 to transmit binary attachments through text-based email protocols.
  • JWT Tokens: JSON Web Tokens use Base64url encoding — decode them to inspect payload contents.

Frequently Asked Questions

What is Base64 encoding?▼

Base64 is a binary-to-text encoding scheme that represents binary data as ASCII characters. It's commonly used to embed images in HTML/CSS, transmit data over text-based protocols, and encode credentials in HTTP headers.

Is Base64 encryption?▼

No, Base64 is NOT encryption. It's simply an encoding scheme that makes binary data representable in text format. Anyone can decode a Base64 string — it provides no security whatsoever.

Does it support Unicode/UTF-8?▼

Yes, our tool handles UTF-8 text correctly by using encodeURIComponent before encoding, ensuring special characters and non-ASCII text are properly encoded and decoded.

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