Base64 Encoding

Base64 Encoding: Converts binary data into ASCII string format. Commonly used for transmitting data over media designed to handle text.

Text to Encode

0 characters

Examples

Simple Text
Basic text encoding example
Input:
Hello World!
Output:
SGVsbG8gV29ybGQh
JSON Data
JSON object encoding
Input:
{"name": "John", "age": 30, "city": "New York"}
Output:
eyJuYW1lIjogIkpvaG4iLCAiYWdlIjogMzAsICJjaXR5IjogIk5ldyBZb3JrIn0=
Special Characters
Unicode and special characters
Input:
Special chars: äöü ñ @#$%^&*()
Output:
U3BlY2lhbCBjaGFyczogw6TDtsO8IMw4ICBAIyQlXiYqKCk=

Common MIME Types

Documents
text/plain - Plain text
text/html - HTML
application/json - JSON
application/xml - XML
Images
image/jpeg - JPEG images
image/png - PNG images
image/gif - GIF images
image/webp - WebP images
Other
application/pdf - PDF files
application/zip - ZIP archives
audio/mpeg - MP3 audio
video/mp4 - MP4 video

About this tool

Features, specifications, and related tools

Key Features

What makes this tool powerful

  • Text to Base64 encoding and decoding
  • File to Base64 conversion for images and documents
  • Batch processing for multiple files
  • Preview mode with download options
  • Unicode and special character support

Specifications

Technical details and settings

Category
Encoding Tools
Processing
Client Side
Security
Local Only
Difficulty
Beginner

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Base64 Image Converter

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How Base64 Works

Binary to Text Conversion

Base64 converts binary data into a text format using 64 different ASCII characters. This makes it safe to transmit binary data over text-based protocols like email.

Encoding Process

  1. Binary data is split into 6-bit groups
  2. Each 6-bit group maps to one of 64 characters
  3. Characters include A-Z, a-z, 0-9, + and /
  4. Padding with = characters if needed

Example

Text: "Hi"
Binary: 01001000 01101001
6-bit groups: 010010 000110 1001
Padding: 010010 000110 1001 000000
Base64: "SGk="

Common Use Cases

Email Attachments

Encode binary files for safe transmission in email messages.

Data URLs

Embed images and files directly in HTML/CSS using data: URLs.

API Requests

Transmit binary data in JSON API requests and responses.

Configuration Files

Store binary data in text-based configuration files.

Base64 Character Set

A-Z (26 chars)
a-z (26 chars)
0-9 (10 chars)
+ / (2 chars)

Total: 64 characters (6 bits of information per character)

Data URL Format

data:[<mediatype>][;base64],<data>

Format

"Hello" encoded in Base64 with data URL prefix

Example

data:text/plain;base64,SGVsbG8=

Use

Can be used directly in HTML img tags, CSS backgrounds