Text Encoder & Decoder

Encode to Base64 Decode from Base64

URL-Safe Base64 (replace + and / with - and _)

Text Encoding:

Input:

Output:

Ready to process

File Encoder

Convert files to Base64 format (useful for embedding in HTML/CSS or data URIs)

Select File:

Include Data URI prefix (data:mime/type;base64,)

File Base64 Output:

No file selected

Batch Processor

Batch Input (one item per line):

Encode All Decode All

Batch Results:

Ready for batch processing

About Base64 Encoder & Decoder

Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format. It's commonly used in web development, email systems, and data storage to encode binary data that needs to be transmitted over text-based protocols.

Key Features

Bidirectional Conversion: Encode text to Base64 and decode Base64 back to text
File Support: Encode files directly to Base64 with optional data URI format
URL-Safe Option: Generate URL-safe Base64 by replacing + and / characters
Multiple Encodings: Support for UTF-8, ASCII, and Latin-1 text encodings
Batch Processing: Process multiple strings simultaneously
Data URI Generation: Create data URIs for embedding files in HTML/CSS
Export Options: Copy results or download as text files

Understanding Base64

Character Set: Uses A-Z, a-z, 0-9, +, / (64 characters total)
Padding: Uses = characters for padding when needed
Size Increase: Base64 encoding increases data size by approximately 33%
URL-Safe Variant: Replaces + with - and / with _ for URL compatibility

Technical Notes

Supports Unicode characters through UTF-8 encoding
Handles binary files of any type and size
Generates proper MIME type detection for data URIs
All processing done locally in your browser
Compatible with all major programming languages and systems

Common Use Cases

Our Base64 Encoder & Decoder is essential for various development and data processing tasks:

🌐 Web Development

Embedding images in CSS/HTML
Creating data URIs
API data transmission
Inline SVG encoding

📧 Email & Communication

Email attachment encoding
MIME message formatting
Binary data in JSON
Secure data transmission

💾 Data Storage

Database binary storage
Configuration file encoding
Serialization formats
Cross-platform data exchange

🔐 Security & Authentication

Basic HTTP authentication
Token encoding
Certificate data handling
Cryptographic key storage

Frequently Asked Questions

What is Base64 encoding used for?

Base64 encoding is used to convert binary data into a text format that can be safely transmitted over text-based protocols like HTTP, email, or stored in text files and databases.

Why does Base64 make data larger?

Base64 encoding represents 3 bytes of binary data using 4 ASCII characters, resulting in approximately 33% size increase. This trade-off ensures compatibility with text-based systems.

What's the difference between regular and URL-safe Base64?

URL-safe Base64 replaces + with - and / with _ to avoid conflicts with URL special characters. It's used when Base64 data needs to be included in URLs or filenames.

Can I encode any type of file?

Yes! Our tool can encode any file type to Base64, including images, documents, executables, and more. The file is read as binary data and converted to Base64 text.

What are data URIs and when should I use them?

Data URIs allow you to embed file content directly in HTML/CSS using the format "data:mime/type;base64,encoded_data". They're useful for small files to reduce HTTP requests.

Is my data secure when using this tool?

Yes! All encoding and decoding happens locally in your browser. Your files and data never leave your device or get transmitted to any server.

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