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Developer tools·Encoding

Base64 Encode / Decode

Encode or decode Base64 with UTF-8-safe handling for Unicode, emojis, and binary payloads. Runs locally in your browser.

Added Apr 18, 2026

Input

Result

Enter a value for mode to see your result.

How it works

Encodes plain text to Base64 or decodes Base64 back to text, fully in your browser with UTF-8 support for international characters.

Step by step

  1. 01Select Encode to convert plain text to Base64, or Decode to reverse the process.
  2. 02Type or paste your input in the text area.
  3. 03The result appears instantly below — click Copy to copy it.

Examples

Encode 'Hello, World!'

The ASCII string 'Hello, World!' encodes to 'SGVsbG8sIFdvcmxkIQ==' in Base64.

Inputs

Mode:
encode
Input:
Hello, World!

Result

Output:
SGVsbG8sIFdvcmxkIQ==

Decode 'SGVsbG8sIFdvcmxkIQ=='

Decoding 'SGVsbG8sIFdvcmxkIQ==' returns the original string.

Inputs

Mode:
decode
Input:
SGVsbG8sIFdvcmxkIQ==

Result

Output:
Hello, World!
Note: Encoding is done in the browser — no data is sent to any server. UTF-8 characters (emoji, accents) are fully supported via percent-encoding.

Related guides

  • What is Base64 Encoding?

    A clear explanation of Base64 encoding -- what it is, why it exists, and how to encode and decode text or binary data using it.

  • How to Use Base64 Encoding

    Understand Base64 encoding -- what it is, how it works, when to use it, and common pitfalls. Includes examples for encoding images, JSON payloads, and.

  • Unicode & UTF-8: Why Encoding Matters

    Unicode, UTF-8, and Why Encoding Matters for Developers -- Unicode assigns code points to characters. UTF 8 encodes those code points as bytes -- variable.

Frequently asked questions

What is Base64?

Base64 is an encoding scheme that converts binary data into a set of 64 printable ASCII characters. It is widely used to embed binary data in text formats like JSON, XML, and email.

Is my data safe?

Yes. All encoding and decoding happens in your browser. No data is transmitted to any server.

Does it support emojis and accented characters?

Yes. The encoder converts the text to UTF-8 bytes before encoding, so any Unicode character is handled correctly.