Base64 Encoder and Decoder Online

Free online tool to encode text into Base64 format and decode Base64 strings back to text. Perfect for developers working with data encoding, URL-safe strings, and binary data transmission.

Core Features

  • Text Encoding & Decoding

    Convert plain text to Base64 and decode Base64 strings back to their original text with support for special characters and Unicode.

  • URL-Safe Encoding

    Generate URL-safe Base64 strings by replacing '+' with '-' and '/' with '_', perfect for use in URLs and filenames.

  • File Support

    Upload text files for encoding or load Base64 data from files for quick decoding. Download results as text files.

Advanced Features

  • Auto-Detection

    Automatically detect Base64 strings and validate input format to prevent errors during encoding and decoding.

  • Format Preservation

    Option to preserve newlines and formatting in the encoded output, maintaining text structure when decoded.

Common Use Cases for Base64

  • • Encoding binary data for transmission in text-based protocols
  • • Creating data URLs for embedding images and files in HTML/CSS
  • • Storing binary data in JSON format
  • • Making strings URL-safe for web applications
  • • Email attachments and MIME encoding

Frequently Asked Questions

What is Base64 encoding?

Base64 is a binary-to-text encoding scheme that represents binary data using 64 characters (A-Z, a-z, 0-9, + and /). It's commonly used to transmit binary data through systems that only support text content.

Why use URL-safe Base64?

URL-safe Base64 replaces characters that have special meaning in URLs (+ and /) with URL-safe alternatives (- and _). This makes the encoded string safe to use in URLs without additional encoding.

Is Base64 encoding secure?

Base64 is an encoding method, not an encryption method. It doesn't provide security or privacy - anyone can decode Base64 data. Use proper encryption if you need to secure your data.

Start Encoding and Decoding

Whether you're working with data URLs, handling binary data, or need URL-safe strings, our Base64 tool makes encoding and decoding simple and efficient. Try it now with our user-friendly interface!