What is Base64 Encoding?

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-64 representation. It uses 64 characters (A-Z, a-z, 0-9, +, /) and padding with = symbol.

How does Base64 encoding work?

Base64 encoding works by breaking binary data into 3-byte chunks (24 bits), splitting each chunk into four 6-bit groups, and mapping each group to a Base64 character. The output size increases by approximately 33%.

Why use Base64 encoding?

Base64 encoding is used for safe data transfer in text-only systems like APIs, JSON, email attachments (MIME), and URL parameters. It prevents corruption from special characters and ensures universal compatibility across programming languages and platforms.

Can I encode files and images to Base64?

Yes, this tool supports encoding any file type to Base64, including images (PNG, JPG, GIF, SVG), PDFs, documents, and binary files. Simply switch to the File Input tab, select your file, and click Encode.

Is Base64 encoding secure?

Base64 is an encoding scheme, not encryption. It does not provide any security or privacy. Anyone can decode Base64 data back to its original form. If you need to protect sensitive data, use proper encryption methods before encoding to Base64.

XKit

Base64 Encoder & Decoder

Free online tool to encode and decode text, images, and files to Base64 format instantly.

Base64 Encoder

Encode text or files into Base64 format. Select character encoding for text.

Text to Encode

Character Encoding

Select the character encoding of the input text (UTF-8 is common). Browser support for encodings other than UTF-8 may vary.

About Base64 Encoding

Base64 encoding is a method of converting binary data into ASCII text format. It's widely used in web development, email systems, and data storage to safely transmit binary data over text-based protocols. Our free Base64 encoder supports multiple character encodings and can handle both text and file inputs.

Common Use Cases for Base64

Data URIs: Embed images directly in HTML/CSS using data:image/png;base64,...
API Authentication: HTTP Basic Auth headers use Base64 encoded credentials
Email Attachments: MIME encoding uses Base64 for binary attachments
JSON Data: Store binary data in JSON payloads
URL Parameters: Safely pass binary data in URLs

Base64 Encoder

About Base64 Encoding

Common Use Cases for Base64

Frequently Asked Questions

What is Base64 Encoding?

Key Features & How It Works

Why Use Base64?

Can I encode files and images to Base64?

Is Base64 encoding secure?