Image to Base64 Converter

Convert any image to a Base64 data URI for use in HTML, CSS, or JavaScript — instantly in your browser.

Ad · 728×90
🖼️
Drop an image here, or click to browse
PNG · JPG · GIF · WebP · SVG · BMP · ICO
Preview
File: —
Type: —
Size: —
Dimensions: —
Base64 length: —
⚠ Large image — embedding may slow page load
Raw Base64
Data URI (data:image/…;base64,…)
HTML <img> tag
CSS background-image
Ad · Responsive

What is Image to Base64 Conversion?

Converting an image to Base64 encodes the raw binary file data as a string of ASCII characters. The result — called a data URI — looks like data:image/png;base64,iVBORw0KGgo… and can be embedded directly in HTML, CSS, or JavaScript without needing a separate file request to a server.

This technique is most useful for small images: icons, logos, loading spinners, and decorative SVGs that you want bundled into your HTML or CSS. By inlining these assets you eliminate extra HTTP requests, which can improve performance for small sites. The trade-off is that Base64-encoded images are roughly 33% larger than the original binary, so this approach is not recommended for large photographs.

This tool runs entirely in your browser. Your image is never sent to any server — it is read locally using the FileReader API.

How to Use

  1. Drop an image onto the upload area, or click it to browse for a file.
  2. The tool instantly generates the raw Base64, data URI, ready-to-use HTML <img> tag, and CSS background-image snippet.
  3. Click Copy next to any output to copy it to your clipboard.
  4. Paste the data URI directly into your HTML, CSS, or JavaScript source.

Frequently Asked Questions

Base64 is ideal for small images under 5–10 KB: icons, small logos, UI elements, and inline SVGs. For larger images the 33% size overhead and inability to cache the image separately outweigh the benefit of saving an HTTP request. With HTTP/2 and HTTP/3, the single-request argument is weaker than it used to be, so today Base64 is mostly used for images embedded in emails (which can't reference external URLs) and data URIs in JavaScript-generated content.

Yes, data URI images work in most email clients for small inline images. However, many email clients (including Gmail) block or strip data URIs for security reasons. The most reliable approach for email images is hosting them on a public URL. That said, for small icons and decorative elements, Base64 can work well in clients that support it.

No. This tool runs entirely in your browser using the FileReader API. Your image is never sent to any server, never logged, and never stored. Closing the tab removes all data immediately.
🔐 Base64 Text Encoder Encode and decode Base64 strings 🌐 Favicon Generator Create favicons from text, emoji or image 🔲 QR Code Generator Generate QR codes for any URL or text 🔗 URL Encoder Encode and decode URL components 📋 JSON Formatter Format & validate JSON with tree view ✨ Code Beautifier Format and beautify HTML, CSS & JS
Ad · Responsive