Base64 Encoder & Decoder Tool
Convert text and files to Base64 encoding or decode Base64 strings back to original format
Base64 is a binary-to-text encoding scheme that represents binary data as ASCII text. Perfect for embedding images in HTML/CSS, API data transmission, and safely storing binary data in text-based systems. No server uploads - all processing happens locally in your browser for maximum security!
Quick Tips & Use Cases
Common Encoding Uses:
- Embed inline images into HTML/CSS Data URIs
- Transmit binary payloads securely over REST APIs
- Format email attachments (MIME Base64)
- Store binary data in text databases
When to Decode:
- Extract embedded image files from CSS or JSON
- Decode encoded API request headers or tokens
- Convert data URIs back to downloadable files
- Inspect base64 obfuscated payload strings
Advanced Base64 Features
Privacy First
All processing happens locally in your browser. No data is sent to servers.
Lightning Fast
Instant conversion with no waiting time or file size limits.
Multiple Formats
Support for text, images, documents, and any file type.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a binary-to-text encoding scheme that converts binary data into an ASCII string format using 64 printable characters (A-Z, a-z, 0-9, +, /). It is commonly used to send binary data over text-based protocols like HTTP or Email.
Does Base64 encrypt data?
No! Base64 is an encoding mechanism, not encryption. Anyone can decode a Base64 string back to its original form. Do not use Base64 to secure sensitive passwords without encryption.
Why does Base64 increase file size?
Base64 represents 3 bytes of binary data using 4 printable ASCII characters. This increases the total data size by approximately 33%.