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Encoded!
Base64 string ready.
Free Image to Base64 Converter — Encode Images for HTML, CSS & JavaScript
Convert any image to a Base64 encoded string instantly — free, in your browser, with no upload required. Base64 encoding allows you to embed images directly into HTML, CSS, or JavaScript code, eliminating the need for separate image files and HTTP requests. Ideal for developers, email templates, and offline web apps.
How to Convert Image to Base64
- Upload your image (JPG, PNG, WEBP, GIF, SVG) using the browse button or drag and drop.
- The tool instantly generates the Base64 encoded string.
- Copy the Base64 string, the HTML img tag, or the CSS background snippet.
- Paste directly into your code — no file hosting needed.
When Should You Use Base64 Images?
- Email templates: Many email clients block externally hosted images. Base64 embedding ensures your images always display correctly.
- Single-file HTML pages: Embed images directly in HTML to create self-contained files with no external dependencies.
- Small icons and logos: For small UI elements, Base64 avoids an extra HTTP request which can improve page performance.
- CSS backgrounds: Use Base64 for background images in CSS — works great for patterns and small textures.
- Offline web apps: Apps designed to work without internet can embed all assets as Base64 strings.
Frequently Asked Questions
What is Base64 encoding?
Base64 is a method of encoding binary data (like images) into a plain text string using 64 ASCII characters. This lets you embed binary files directly in text-based formats like HTML, CSS, and JSON.
Does Base64 increase file size?
Yes, Base64 encoding increases file size by approximately 33%. For large images, it is better to host them as separate files. Base64 is best suited for small images, icons, and logos.
How do I use the Base64 string in HTML?
Use it in an img tag like this: <img src="data:image/jpeg;base64,YOUR_STRING">. Our tool generates this complete snippet for you to copy directly.
What image formats are supported?
JPG, PNG, WEBP, GIF, SVG and most common image formats are supported. The output includes the correct MIME type prefix automatically.
Is my image sent to a server?
No. The conversion is done entirely in your browser using JavaScript's FileReader API. Your image data is never transmitted anywhere.