Base64 Encoder / Decoder
Fast, privacy-first Base64 with UTF-8 support, URL-safe option, and file drag & drop.
About Base64
Base64 encodes binary data as text using 64 characters. Use URL‑safe for web contexts, remove padding when required, and wrap lines for email (RFC 2045). Your data stays in your browser.
About this Base64 Encoder/Decoder
Encode text to Base64 and decode Base64 back to text instantly. Base64 encoding converts binary data into ASCII text format, making it safe for transmission across text-based protocols like email, HTTP, and JSON. Essential for web developers, system administrators, and anyone working with data encoding and transmission.
Key Features
Encode text and binary data to Base64 format
Decode Base64 strings back to original text
Handle Unicode characters and special characters
Real-time encoding and decoding as you type
Copy encoded or decoded text to clipboard
Support for large text inputs
Works entirely in your browser for privacy
No data sent to servers - all processing is local
How to Use
Enter or paste the text you want to encode or decode
Click 'Encode' to convert text to Base64 format
Click 'Decode' to convert Base64 back to readable text
View the result in the output field
Use the copy button to copy the encoded or decoded text
Switch between encode and decode modes as needed
Popular Use Cases
Encode data for transmission in JSON APIs
Encode images and files as data URLs in HTML
Encode credentials and tokens for HTTP authentication
Decode Base64 data received from APIs or services
Encode binary data for storage in text-only systems
Encode email attachments in MIME messages
Encode configuration data in text-based config files
Decode Base64 strings from logs and debugging output
Tips & Best Practices
Base64 encoding increases data size by approximately 33%
Use Base64 for data transmission, not for encryption or security
Base64 is commonly used in data URLs (data:image/png;base64,...)
Decode Base64 when debugging API responses or logs
Use Base64 for embedding small images directly in HTML/CSS
Remember that Base64 is encoding, not encryption - it's easily reversible
Base64 strings always end with = or == for padding
Frequently Asked Questions
What is Base64 encoding?
Base64 is an encoding scheme that converts binary data into ASCII text using 64 characters (A-Z, a-z, 0-9, +, /). It's used to transmit binary data over text-based protocols.
Is Base64 encryption?
No, Base64 is encoding, not encryption. It's easily reversible and provides no security. Anyone can decode Base64 data.
Why does Base64 output have = at the end?
The = characters are padding to ensure the Base64 string length is a multiple of 4. This is required by the Base64 standard.
Can I encode images with Base64?
Yes, images can be encoded to Base64 and used in data URLs. However, Base64 increases file size by about 33%, so it's best for small images.
Learn More About Base64 Encoding
Discover how Base64 encoding works and when to use it in your projects
Getting Started with Base64 Encoding: A Complete Guide
Learn everything you need to know about Base64 encoding, from basic concepts to advanced usage in web development and data transmission.
