Free Online Base64 Encoder & Decoder Tool
Use our fast and secure Base64 Encoder & Decoder to convert text to Base64 format or decode Base64 strings back to readable text instantly. This tool works entirely in your browser — no uploads, no tracking, and no stored data.
What Is Base64 Encoding?
Base64 is a binary-to-text encoding scheme that converts data into ASCII characters. It is commonly used when transferring data over systems that only support text formats.
Hello World → SGVsbG8gV29ybGQ=
Base64 ensures that binary files, special characters, and multimedia data can be transmitted safely in JSON, XML, HTML, or API requests.
Common Uses of Base64
- Embedding images in HTML and CSS
- Sending authentication credentials in APIs
- Encoding email attachments
- Storing binary data inside JSON
- Preventing character corruption during transfer
Base64 Is Not Encryption
Base64 is an encoding method — not encryption. It does not protect sensitive information. Anyone can decode Base64 easily. For secure communication, use proper encryption algorithms.
Why Use Our Base64 Tool?
- UTF-8 safe encoding & decoding
- Upload text files (up to 200KB)
- Download encoded output
- Copy results instantly
- Fast browser-based processing
- 100% free and secure
Who Is This Tool For?
- Frontend developers
- Backend engineers
- API testers
- Students learning web development
- DevOps engineers
Frequently Asked Questions
Is this Base64 encoder free?
Yes, it is completely free with unlimited usage.
Is my data safe?
Yes. Everything runs in your browser. No data is sent to any server.
What is the maximum file size?
This tool supports files up to 200KB to maintain performance and speed.