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Base64 Image Encoder

Convert images to text strings for embedding in code.

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Client-Side Only Developer Friendly

Free Image to Base64 Converter

Need to embed an image directly in your HTML, CSS, or a JSON API response? Base64 encoding allows you to represent binary image data as a plain text string. This tool does the conversion instantly in your browser.

What is Base64?

Base64 is a binary-to-text encoding scheme. It takes the raw bytes of a file and converts them into a set of 64 safe ASCII characters. This makes it possible to include images in places where binary data isn't allowed, such as inside a CSS file or within a JSON object.

Use Cases

  • CSS Background Images: background-image: url('data:image/png;base64,...');
  • HTML Image Tags: <img src="data:image/png;base64,..." />
  • API Payloads: Sending image data in a JSON body.
  • Email Embedding: Inline images in HTML emails.

Encode images to Base64 — embed them in HTML, CSS or JSON

Convert an image into a Base64 string you can paste straight into HTML, CSS or a JSON payload. Embedded images travel inside the code itself — no separate file requests, no broken links, no image hotlinking to worry about.

The encoder shows the output size so you can make the classic trade-off knowingly: Base64 is about a third larger than the binary file, which is a bargain for small icons and a bad deal for hero photos.

What people use it for

  • Inlining small icons and logos into HTML and CSS
  • Embedding images in JSON APIs and email templates
  • Creating self-contained single-file web pages
  • Data URIs for canvas and offline apps

Frequently asked questions

How do I embed an image as Base64?

Upload the image, copy the generated data URI, and paste it into an or a CSS background-image. It renders identically to the file version.

When should I NOT use Base64?

For large photos. The encoding adds ~33% size and can't be cached separately by the browser. Under ~10 KB, it is usually a win.

Which formats can be encoded?

Any image the browser can read: PNG, JPG, WebP, GIF, SVG and more.

Is the output safe for JSON?

Yes — Base64 uses only letters, digits and a few symbols, so it travels through JSON without escaping problems.

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