Base64 Encoder
Encode text to Base64 format. Useful for transmitting binary data through text-only media.
Input
Output
About this tool
All data is processed locally in your browser. No information is sent to our servers.
About this tool
The Base64 encoder is an essential tool for developers that allows converting binary data or text into an ASCII-safe representation for transmission through protocols that only support printable characters. Base64 uses a set of 64 characters (A-Z, a-z, 0-9, + and /) to represent binary data, converting each group of 3 bytes into 4 encoded characters. This encoding scheme is fundamental in many modern web technologies, including HTTP Basic authentication, embedding images in HTML/CSS, transmitting data in JSON, and storing binary data in text-based systems. The tool processes everything locally in your browser, ensuring that sensitive data never leaves your device. It's especially useful when you need to send files, images, or binary data through APIs that require JSON format, or when working with authentication systems that use Base64-encoded tokens.
Use cases
- Embed images directly in HTML or CSS using data URIs
- Encode credentials for HTTP Basic authentication
- Transmit binary data through JSON APIs
- Encode data for storage in text-only systems
Frequently asked questions
- What is Base64 and what is it used for?
- Base64 is an encoding scheme that converts binary data to ASCII text. It's used to transmit data through media that only support printable characters, such as email, JSON, or XML.
- Is Base64 encoding secure for sensitive data?
- Base64 is NOT encryption, it's only encoding. Encoded data can be easily decoded. Do not use Base64 to protect sensitive information, use real encryption like AES instead.
- Why is Base64 encoded text 33% longer?
- Base64 converts every 3 bytes to 4 characters, increasing size by approximately 33%. This is the cost of representing binary data as printable ASCII text.
- Can I encode any type of file in Base64?
- Yes, Base64 can encode any binary data, including images, PDFs, videos, and any other file type. However, the size will increase by 33% and it's not efficient for large files.