Convert String to Base64 Online - Free Base64 Encoder

What is String to Base64?

String to Base64 is a free online tool that essentially helps you to encode text into Base64 format. Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It is commonly used when there is a need to encode data that needs to be stored and transferred over media that are designed to deal with textual data.

Related Tools:

• Base64 to String: Convert Base64 encoded strings back into their original text form.

How to use?

1. Enter Text: Type or paste your string into the “Input String” panel.
2. View Result: The encoded Base64 string appears instantly in the “Base64 Output” panel.
3. Copy/Download: Click “Copy” to use the result or “Save” to download it as a file.

Tool Options

• No Split: Output Base64 as a single continuous string (useful for web URLs or tokens).
• Split by Width: Splits the output into multiple lines with a fixed width. You can customize the chars per line (default is 76 characters, a common standard for MIME).
• Split by Newline: Encodes each line of the input separately. This is useful when you have a list of items and want a corresponding list of Base64 strings.

Examples

Here is a quick look at how string-to-base64 conversion works:

# Input
Hello World

# output
SGVsbG8gV29ybGQ=

# Input with Emoji (UTF-8 supported)
Hello 👋

# Output
SGVsbG8g8J+Riw==

Why use Base64 Encoding?

• Data Transmission: Ensure data integrity when transmitting binary data over protocols that are designed for text (like email or JSON).
• Embedding Assets: Embed small images or fonts directly into CSS or HTML files using Data URIs.
• Compatibility: Represent complex characters or binary data in a format that is safe for URLs and filenames.
• Basic Obfuscation: Hide data from casual viewing (though remember, Base64 is NOT encryption).

FAQ

1. Is this tool secure?

Yes. All conversions happen locally in your browser. Your data is never sent to our servers, ensuring your privacy remains intact.

2. Does it support UTF-8 characters?

Yes. Our tool uses modern encoding methods to correctly handle special characters, emojis, and multi-byte strings.

3. Why is the output longer than the input?

Base64 encoding increases the data size by approximately 33%. This is the trade-off for ensuring the data is made of safe, printable characters.