text Tool · Free
Free Base64 Encoder & Decoder Online
Encode and decode Base64 strings online free. Supports text and file input. Results appear instantly in your browser. No sign-up, no upload to server.
🔒100% Private: Your files are processed entirely in your browser and never uploaded to any server.
Frequently Asked Questions
What is Base64?
Base64 is an encoding scheme that converts binary data to a text representation using 64 ASCII characters. It's commonly used in email, data URLs, and APIs.
Can I encode files to Base64?
Yes — use the 'File' input tab to encode any file to its Base64 data URI representation.
Is special character encoding supported?
Yes, the encoder correctly handles Unicode and special characters via URI encoding.
Is my data sent to a server?
No — all encoding/decoding happens in your browser using native JavaScript APIs.
Is it free?
Yes, completely free with no sign-up.
About This Base64 Encoder / Decoder
Encode and decode text or files to and from Base64 format online for free. This is an essential utility for developers, designers, and system administrators who need to quickly format data.
What is Base64?
Base64 is a way to encode binary data (like images or files) into an ASCII string format using 64 safe characters. It ensures that data remains intact without modification during transport across networks that may only support text (like JSON APIs, XML, or email attachments).
Common Use Cases
- Embedding small images directly into HTML/CSS to reduce HTTP requests
- Sending binary data via JSON APIs
- Encoding basic authentication headers (username:password)
- Safely storing complex data formats in plain text fields
Privacy
All encoding and decoding happens entirely in your web browser. Any text or files you process are never transmitted to our servers.