Convert images to Base64 strings or Data URLs instantly. Supports PNG, JPG, GIF, WebP, SVG. 100% free, no signup, no upload to server.
Drag and drop an image here
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Convert any image format (PNG, JPG, GIF, WebP, SVG)
Get Base64 string or complete Data URL
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Copy to clipboard with one click
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Show file size before and after
100% client-side processing
No file upload to server
Works on all devices
No signup required
Instant conversion
Use Data URLs directly in img src or CSS background-image without external files.
Embed images directly in email HTML to avoid broken images from blocked external resources.
Include image data in JSON payloads or API requests without multipart form uploads.
Bundle small images directly into HTML for single-file applications or demos.
Store small images as Base64 strings in database text fields when file storage is not available.
Inline small images to reduce the number of HTTP requests and improve page load time.
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The fastest and most private way to convert images to Base64 online.
Supports PNG, JPG, JPEG, GIF, WebP, SVG, and more image formats.
Get complete Data URLs with MIME type, ready to use in HTML/CSS.
Copy Base64 string or Data URL to clipboard instantly.
Convert images to Base64 in milliseconds with no delay.
Images never leave your device. All processing in browser.
Use on any device - desktop, tablet, or mobile browser.
Everything developers need to know about image Base64 encoding
A Data URL for images follows this format:
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA...data: - URL scheme
image/png - MIME type of the image
;base64, - Encoding type indicator
iVBORw0K... - The actual Base64 encoded data
image/pngimage/jpegimage/gifimage/webpimage/svg+xmlSee how Edesy compares to other online tools
| Feature | Edesy | Others |
|---|---|---|
| Free to use | ||
| No signup required | ||
| Client-side only | ||
| All image formats | ||
| Data URL output | ||
| File size display | ||
| Preview before convert | ||
| Mobile friendly |
More free tools for developers
Base64 encoding is ideal for small images like icons, logos, and UI elements under 10KB. The main benefit is reducing HTTP requests - instead of the browser making a separate request for each image, the image data is embedded directly in your HTML or CSS. This can improve initial page load time for pages with many small images.
Avoid Base64 for large images because the 33% size overhead becomes significant. Large Base64 strings also cannot be cached separately by browsers, meaning they are downloaded every time the HTML/CSS is loaded. For images over 10KB, traditional external image files with proper caching are usually better.
JavaScript: Use FileReader.readAsDataURL() or canvas.toDataURL(). Python: Use base64.b64encode(). PHP: Use base64_encode(file_get_contents()). Node.js: Use Buffer.from(data).toString("base64"). Most languages have built-in support for Base64 encoding.
While Base64 reduces HTTP requests, it increases HTML/CSS file size and cannot be cached independently. For optimal performance, use Base64 for critical above-the-fold images and small icons, but use regular image files for larger images that can benefit from browser caching and lazy loading.
Our converter processes images entirely in your browser. No data is sent to any server. This makes it safe for converting sensitive images. The JavaScript FileReader API handles the conversion locally, ensuring your images remain private.