Base64 Encoder & Decoder
Encode and decode Base64 strings and files. Convert text to Base64 and vice versa with file support.
Key Features
🔄 Text Conversion
Easily encode text to Base64 and decode Base64 back to text.
📁 File Support
Convert files to Base64 strings and decode Base64 back to downloadable files.
🔒 Privacy Protected
All conversions happen locally in your browser. No files are uploaded to servers.
⚡ Instant Processing
Fast encoding and decoding with no server latency.
Frequently Asked Questions
Getting Started
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that represents binary data in an ASCII string format using 64 characters (A-Z, a-z, 0-9, +, /). It's commonly used for encoding images, files, and other binary data in text-based formats like JSON, XML, HTML, and URLs.
Why use Base64 encoding?
Base64 is used when you need to transmit binary data over channels that only support text (like email, JSON, or URLs). It's also used for embedding images directly in HTML/CSS, storing binary data in databases, and creating data URIs.
Is my data safe?
Yes. All encoding and decoding happens locally in your browser using JavaScript. Your files and data never leave your device or get sent to any server, ensuring complete privacy.
Using the Tool
How do I encode text to Base64?
Switch to the "Encode" tab, type or paste your text into the left input box, and click "Encode to Base64". The encoded result will appear in the right box. You can then copy it to your clipboard.
How do I decode Base64 to text?
Switch to the "Decode" tab, paste your Base64 string into the left input box, and click "Decode from Base64". The decoded text will appear in the right box. The tool validates the input to ensure it's valid Base64.
Can I convert files to Base64?
Yes! Use the "File Support" tab to upload any file. The tool will convert it to a Base64 string. You can also convert Base64 back to a file and download it. All file types are supported.
What file types are supported?
All file types are supported - images (PNG, JPG, GIF), documents (PDF, DOC, TXT), videos, audio files, and any other binary data. The tool handles the encoding/decoding regardless of file type.
Examples
Example: Encode simple text
Input:
Hello World
Base64 Output:
SGVsbG8gV29ybGQ=
Example: Encode JSON data
Input:
{"name":"John","age":30}
Base64 Output:
eyJuYW1lIjoiSm9obiIsImFnZSI6MzB9
Example: Encode special characters
Input:
Hello, World! 🌍
Base64 Output:
SGVsbG8sIFdvcmxkISDwn5iM
Example: Decode Base64 string
Base64 Input:
VXNlcm5hbWU6YWRtaW4=
Decoded Output:
Username:admin
Technical Details
What is the '=' at the end?
The '=' characters are padding added to make the Base64 string length a multiple of 4. Padding may be 0, 1, or 2 '=' characters depending on the input length. Some variants like Base64URL omit padding.
Is there a file size limit?
The tool can handle files up to several MB in modern browsers. Very large files may cause performance issues due to browser memory limitations. For extremely large files, consider using command-line tools.
What's the difference between Base64 and Base64URL?
Base64URL is a variant designed for URLs and filenames. It replaces '+' with '-' and '/' with '_', and omits padding '='. This makes it safe to use in URLs without additional encoding.
Can I use this for passwords or secrets?
Base64 is NOT encryption - it's just encoding. Anyone can decode Base64, so never use it to secure sensitive information. For passwords and secrets, use proper encryption or hashing algorithms.