File to Base64

Convert any file into a Base64 encoded string. Fast, secure, and 100% client-side.

Last Updated: August 2026
100% Client-Side — Your data never leaves your device

Drop an image here, or click to browse

Supports PNG, JPG, GIF, SVG, WebP

Max 50MB

Why this tool is safe

Your data never leaves your device — everything runs in your browser.

No server uploads. Other tools send your files to their servers. Ours don't.
Zero tracking of content. We never see, store, or log anything you convert.
Works offline. Once loaded, the tool works without an internet connection.
No account required. Instantly use all tools completely free without signing up.

Secure Client-Side File Encoding

Our File to Base64 tool allows you to convert any file (PDF, ZIP, DOCX, etc.) into a Base64 string directly in your browser. Because the processing happens locally, your sensitive files are never uploaded to our servers.

When to Use Base64 for Files

  • Attaching files to JSON payloads for REST APIs.
  • Sending documents through email APIs (like SendGrid or Mailgun).
  • Storing small user uploads in databases without a dedicated file storage system.
  • Bypassing network filters that block specific binary file types.

Frequently Asked Questions

Search below or browse through our most commonly asked questions.

Yes! Because the conversion happens entirely in your browser, you can convert very large files without worrying about upload limits or network speed.
No, your files never leave your device. The conversion is done entirely client-side using JavaScript's FileReader API.

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