Free Online Base64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to plain text. Supports Unicode char...Encode text to Base64 or decode Base64 back to plain text. Supports Unicode characters and file uploads.
Output will appear here...
Tool Features
Why Use Free Online Base64 Encoder / Decoder?
Full Unicode Support
Properly handles emojis, accented characters, Chinese, Japanese, and all special characters without errors.
File Upload Support
Encode images, documents, or any file to Base64. Perfect for embedding assets in HTML, CSS, or JSON.
100% Private
All encoding and decoding happens in your browser. Your data never leaves your device or gets sent to any server.
Quick Swap Feature
Easily swap input and output to re-encode or decode results. Save time when working with multiple conversions.
Download Results
Download your encoded or decoded output as a text file for easy storage and sharing.
Instant Processing
Convert text to Base64 or decode Base64 strings with a single click - fast and reliable.
Common Uses for Base64
Web Development
Embed images in CSS/HTML using data URIs, encode API tokens, or handle binary data in JSON.
Email Attachments
Base64 is used in MIME encoding for email attachments - understand and debug email data.
Data Storage
Store binary data as text in databases, configuration files, or environment variables.
API Integration
Many APIs require Base64 encoding for authentication tokens, file uploads, or data payloads.
How It Works
Choose Your Mode
Select "Encode" to convert text to Base64, or "Decode" to convert Base64 back to readable text.
Enter Your Input
Type or paste your text directly, or upload a file. The tool supports Unicode characters, emojis, and binary files.
Get Your Result
Click the button to convert. Copy the result to clipboard or download it as a file for later use.
Tips & Information
Data URIs
Use Base64-encoded images as data URIs in CSS: background-image: url(data:image/png;base64,...) to reduce HTTP requests.
Size Consideration
Base64 increases size by ~33%. For large files, consider direct file serving instead of Base64 embedding.
Not Encryption
Base64 is encoding, not encryption. Never use it to protect sensitive data - anyone can decode it instantly.