Base64 Encoder / Decoder
Encode text or files to Base64 and decode Base64 strings.
What is Base64?
Base64 is an encoding scheme that converts binary data into a text string using 64 printable ASCII characters. It is widely used in email attachments, data URIs, API authentication tokens, and anywhere binary data needs to be embedded in text-based formats like JSON or XML.
How to Use This Tool
- Enter your text or paste Base64 data into the input field.
- Click "Encode" to convert text to Base64, or "Decode" to convert Base64 back to text.
- Copy the output.
Common Use Cases
Base64 encoding is used for: embedding images in HTML and CSS (data URIs), HTTP Basic Authentication headers (username:password encoded as Base64), storing binary data in JSON APIs, encoding JWTs (JSON Web Tokens), and email MIME encoding.
Frequently Asked Questions
Is Base64 a form of encryption?
No. Base64 is encoding, not encryption. Anyone can decode a Base64 string instantly. Never use it to protect sensitive data.
Why does Base64 output end with == or =?
Base64 encodes data in 6-bit chunks. If the input length is not divisible by 3, padding characters (=) are added to make the output length a multiple of 4.
