File to Base64 Encoder

Convert any file to Base64 instantly. Supports all file types including PDFs, documents, audio, video, and archives. Perfect for API payloads and data embedding.

Drop your file here

or click to browse. Supports all file types up to 50MB.

Encode any file to Base64

Base64 encoding transforms binary files into text that can be safely transmitted through text-based protocols like JSON, XML, or email. This tool handles any file type and generates standards-compliant output.

Choose between raw Base64 output or a complete data URI that includes the MIME type. Data URIs are ready to use in HTML, CSS, or JavaScript.

Supported file types

  • Documents: PDF, Word, Excel, PowerPoint
  • Media: MP3, MP4, WAV, WebM
  • Archives: ZIP, RAR, 7z, GZIP

Features

  • 100% client-side processing
  • Automatic MIME type detection
  • Web Worker processing for large files

FAQs

What's the maximum file size?

You can encode files up to 50MB. For very large files, consider server-side processing or streaming approaches.

Why is the output larger than my file?

Base64 encoding increases file size by approximately 33%. This is expected behavior for all Base64-encoded content.

Is my file uploaded anywhere?

No. All encoding happens in your browser. Your files stay on your device and are never transmitted to any server.