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Image to Base64 Converter

Convert PNG, JPG, WebP, SVG, or GIF images into Base64 strings, Data URIs, HTML <img> tags, and CSS background snippets — 100% locally in your browser.

Need to encode plain text or decode a Base64 string back to text? Use our Base64 Encode / Decode Tool or shrink your image first with the Image Compressor .

How to Convert an Image to Base64

  1. Drag and drop an image into the box above, click to browse your device, or press Ctrl+V to paste a screenshot directly.
  2. Choose your desired output format: Data URI, Raw Base64, HTML <img>, or CSS Background.
  3. Click Copy Base64 to copy the encoded string to your clipboard or download it as a .txt file.

Base64 Output Formats Explained

Format Output Structure Use Case
Data URI data:image/png;base64,... JSON payloads, API requests, inline browser previews
Raw Base64 iVBORw0KGgoAAAANS... Backend APIs, database storage, binary buffers
HTML <img> <img src="data:..." /> Single-file HTML emails, offline templates
CSS Background background-image: url(...) Inline UI icons, critical CSS above-the-fold assets

Frequently Asked Questions

Does Base64 encoding increase image file size?

Yes. Base64 represents every 3 bytes of binary data as 4 ASCII characters, increasing the string size by approximately 33%. However, GZIP or Brotli compression on web servers recovers most of this overhead for small assets.

Are my uploaded images private?

Yes. Your images are read locally inside your browser using JavaScript's FileReader API and are never sent to any remote server.