🔒 Base64 Encoder & Decoder

📖 Online Base64 Encoder & Decoder: Free, Browser-based Tool

Base64 is a standard method to encode binary data using 64 printable characters. Widely used in data transmission, embedded images, URL parameter encoding. ng.cc offers a free online Base64 tool that converts text or images to Base64, generates Data URLs, supports drag-and-drop, with all processing done locally in your browser.

🎯 Why Use Base64 Tools?

• Frontend Development: Embed small images in CSS/HTML, reducing HTTP requests.
• API Integration: Some APIs require images as Base64 strings.
• Data Encoding: Encode URL parameters to prevent direct visibility.
• Email Attachments: Binary data in emails uses Base64 encoding.
• JWT Tokens: All three parts of JWT are Base64Url encoded.

💡 How to Use

Text Encoding

1. Enter any text in the input box.
2. Click "Encode" to get Base64 string.
3. Copy result for use.

Text Decoding

1. Switch to "Base64 Decode" tab.
2. Paste Base64 string.
3. Click "Decode" to see original text or image.

Image to Data URL

1. Click upload area or drag image in.
2. Preview appears and Data URL is generated.
3. Click "Copy Base64" to copy string.

📚 FAQs

Q1: Why does Base64 output look longer?

Base64 encodes 3 bytes into 4 characters. Result is ~33% larger than original.

Q2: What is a Data URL?

Data URL embeds small files inline. Format: data:[<mediatype>][;base64],<data>. Useful for img src.

Q3: Why do Chinese characters garble?

All encoding uses UTF-8 to prevent issues. Other tools may use wrong charset.

Q4: Is Base64 secure?

Not encryption. Anyone can decode. Do not encode passwords or sensitive data. Use AES or other encryption if needed.

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