Base64 Encoder & Decoder Online
Encode text and files to Base64 or decode Base64 strings with real-time preview and secure client-side processing.
Upload File to Encode
Drag & drop files here
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Max file size: 5 MB
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Why Choose Our Base64 Encoder?
Dual-Mode Processing
Supports both text input and file upload with unified Base64 processing. Uses native browser APIs for maximum compatibility and performance across all input types.
Real-Time Preview
Live preview of file contents during encoding and decoding operations. Image preview via data URLs and text preview with intelligent format detection and MIME type support.
Advanced Configuration
Collapsible settings panel with RFC 2045 compliant line wrapping, preview toggle controls, and persistent user preferences for optimal encoding output formatting.
Complete Privacy
All encoding and decoding operations happen locally in your browser. Files and text never leave your device with automatic memory cleanup and no data persistence.
How Base64 Encoding Works
1. Input Content
Choose between text input or file upload. Supports images (PNG, JPG, GIF, SVG, WebP) and text files up to 5MB with automatic format detection.
2. Process & Configure
Automatic format validation and encoding/decoding operations. Configure line wrapping and preview settings for optimal output formatting.
3. Get Results
Copy Base64 output to clipboard, download as text file, or swap input/output for decode operations with bidirectional processing support.
Benefits of Base64 Encoding
Email & Data Transmission
Encode binary files for safe transmission through email and text-based protocols. Base64 ensures data integrity across systems that only handle text.
Web Development
Create data URLs for inline images, encode API payloads, and handle file uploads in web applications without server-side processing.
Configuration Files
Store binary data in JSON, XML, or YAML configuration files. Essential for certificates, keys, and binary assets in DevOps workflows.
Data Exchange
Safely transmit binary data between different systems and platforms. Base64 encoding prevents data corruption during text-based transfers.
Who Uses Base64 Encoding?
Web Developers
Embed images in CSS, create data URLs for HTML, handle file uploads in JavaScript, and process API responses with binary data.
DevOps Engineers
Store certificates and keys in configuration files, handle binary data in CI/CD pipelines, and encode secrets for secure transmission.
API Developers
Encode binary payloads for JSON APIs, handle file attachments in REST services, and process multipart data in web services.