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Base64 'Hello World' Example

The text 'Hello World' encodes to 'SGVsbG8gV29ybGQ=' in Base64. This is one of the most common examples used to demonstrate Base64 encoding.

Try:
11 characters
16 characters

Quick Example

hello→aGVsbG8=

Common Use Cases

📷Embed images in CSS/HTML
📧Encode email attachments
🔗Send binary data via JSON APIs
📄Convert PDFs for storage

💡 Tip: Just type or paste text — output updates instantly! Base64 is commonly used for embedding images, sending data over HTTP, and more.

Code Examples

Here's how to achieve this in different programming languages:

1// Encode to Base64
2const input = "Hello World";
3const encoded = btoa(input);
4console.log(encoded); // "SGVsbG8gV29ybGQ="
5

6// Decode from Base64
7const decoded = atob("SGVsbG8gV29ybGQ=");
8console.log(decoded);

Frequently Asked Questions

What is the Base64 encoding of "Hello World"?

The Base64 encoding of "Hello World" is "SGVsbG8gV29ybGQ=". Base64 converts each character to binary, then encodes in groups of 6 bits using A-Z, a-z, 0-9, +, /.

How do I encode text to Base64?

Use btoa() in JavaScript, base64.b64encode() in Python, or 'echo -n text | base64' in Bash. Our online tool above also encodes instantly.

How do I decode Base64 back to text?

Use atob() in JavaScript, base64.b64decode() in Python, or 'echo text | base64 --decode' in Bash.

Is Base64 encoding the same as encryption?

No, Base64 is NOT encryption. It can be easily reversed by anyone. Never use it to protect sensitive data.

Why does Base64 sometimes end with = or ==?

The = signs are padding. Base64 encodes in groups of 3 bytes to 4 characters. If input isn't divisible by 3, padding is added.

More Base64 Examples

Base64 JSON Encoding Example
Learn how to encode JSON data to Base64. Common use case for APIs, JWT tokens, and data transfer.
Base64 URL Encoding Example
Encode URLs to Base64 for safe embedding. Useful for redirect parameters and data URLs.
Base64 HTML Encoding Example
Encode HTML markup to Base64. Useful for embedding HTML in data URLs or storing in databases.
Base64 Password Encoding Example
See how passwords are encoded to Base64. Note: Base64 is NOT encryption - do not use for security.
Base64 Emoji Encoding Example
Encode emojis and Unicode characters to Base64. See how 😀🎉 becomes Base64.
Base64 JWT Payload Example
Understand JWT token encoding. See how JWT payloads are Base64URL encoded for secure transmission.
HTTP Basic Auth Base64 Example
Create HTTP Basic Authentication headers. Encode username:password format to Base64 for API calls.
Base64 XML Encoding Example
Encode XML documents to Base64 for SOAP messages, API payloads, and data transfer.
Base64 Multiline Text Example
Encode text with multiple lines to Base64. Preserves newlines and formatting in the encoded output.
Binary Data Base64 Example
Convert binary/hex data to Base64 encoding. Common for cryptographic keys, hashes, and binary files.
CSS Data URI Base64 Example
Create Base64 data URIs for CSS backgrounds. Embed small images directly in stylesheets.
Email Attachment Base64 Example
Understand how email attachments are encoded. See Base64 encoding used in MIME/email protocols.

Related Base64 Tools

Base64 EncoderBase64 DecoderImage to Base64 ConverterBase64 to Image ConverterFile to Base64 Converter

📚 Learn More

What is Base64 Encoding?
Learn what Base64 encoding is, how it works, why it's used, and see examples in JavaScript, Python, and more. Complete beginner-friendly guide.