Base64 Converter
Encode files and text to Base64 format or decode Base64 back to original content. Support for images, documents, and plain text conversion.
Upload File to Encode
Click or drag and drop to upload
Base64 Output
Decoded Result
Features
File Encoding
Convert any file to Base64 format. Support for images, documents, and binary files with instant encoding.
File Decoding
Decode Base64 strings back to original files. Download decoded files with proper format detection.
Text Mode
Encode and decode plain text. Useful for encoding text data in URLs or configuration files.
Fast Processing
Instant conversion in your browser. No upload delays or server processing time required.
Privacy First
Files are processed locally in your browser. Data never leaves your device for complete privacy.
Easy Copy
One-click copy to clipboard for encoded output. Quick integration into your development workflow.
Common Use Cases
🌐 Web Development
Embed images directly in HTML/CSS using data URLs. Reduces HTTP requests and improves load times.
📧 Email Integration
Encode file attachments for email APIs. Convert files to text format for transmission through email systems.
🔌 API Development
Send binary data through JSON APIs. Encode images and files as Base64 for REST API payloads.
🔐 Authentication
Encode credentials for HTTP Basic Auth. Test authentication systems with encoded tokens.
📱 Mobile Apps
Transfer files between app and server. Encode media files for transmission through mobile APIs.
⚙️ Configuration
Store binary data in text config files. Encode certificates and keys for configuration management.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a method to convert binary data into ASCII text format. It represents data using 64 printable characters, making binary files transmittable through text-only systems like email or JSON.
When should I use Base64?
Use Base64 when transmitting binary data through text-only channels, embedding small images in HTML/CSS, sending files through JSON APIs, or storing binary data in text configuration files.
Does Base64 increase file size?
Yes, Base64 encoding increases size by approximately 33%. A 100KB file becomes about 133KB after encoding. This trade-off enables text-based transmission of binary data.
Is Base64 encryption?
No, Base64 is encoding, not encryption. It's easily reversible and provides no security. Use proper encryption methods for sensitive data protection.
What file types can I encode?
Any file type can be encoded to Base64 including images (JPG, PNG), documents (PDF, DOCX), and text files. Binary files work as well as text files.
How do I use Base64 in HTML?
Use data URLs with the format: data:image/png;base64,[encoded string]. This embeds images directly in HTML without separate file requests.
Can I decode any Base64 string?
Valid Base64 strings can be decoded. The tool attempts file type detection from the decoded data to provide proper file extensions for download.
Is there a file size limit?
Browser memory limits apply. Most files under 10MB process without issues. Very large files may cause performance issues depending on available system memory.
Are my files uploaded anywhere?
No, all processing occurs in your browser. Files are never uploaded to servers, ensuring complete privacy for sensitive documents.
Why use this instead of command line tools?
Browser-based conversion is faster for one-off tasks, works on any device without installation, and provides visual interface without memorizing commands.
Related Guide
Understand Base64 encoding in simple terms. Learn what it is, how it works, and when to use it.
Read: Base64 Encoding Explained →