Base64 Encode
Encode text, strings, or data to Base64 format. Base64 encoding is commonly used for encoding binary data in text format, embedding images in HTML/CSS, and data transmission. This tool provides fast, client-side Base64 encoding.
When to use this tool
You need to embed binary data into JSON or HTML safely.
You are preparing data for transport through systems that only accept text.
Examples
Basic string encode
Input
hello world
Output
aGVsbG8gd29ybGQ=
Output is safe to use in JSON strings and headers.
Developer use cases
Convert small images into data URLs for quick prototypes.
Encode API credentials for basic auth headers (base64 only, not secure).
Common mistakes to avoid
Assuming Base64 is encryption (it is not).
Forgetting to handle UTF-8 text correctly when encoding.
Format and behavior notes
Base64 output may include padding (=) at the end.
Large binary files should be encoded with file input, not pasted text.
Related Tools
Frequently Asked Questions
What is Base64 encoding used for?
Base64 encoding is used to encode binary data as text, commonly for embedding images in HTML/CSS, data URLs, and API data transmission.
Is my data secure?
Yes, all encoding happens in your browser. Your data never leaves your device, ensuring complete privacy.
Can I encode binary data?
This tool encodes text. For binary files, you would need to convert them to text first (e.g., using file input).