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Image to Base64 Converter

Convert images to Base64 encoding instantly. Upload any image and get the Base64 string for use in HTML, CSS, or JavaScript. 100% free, works entirely in your browser - no uploads to servers.

Features

Convert PNG, JPG, GIF, WebP, SVG images to Base64

Copy to clipboard or download as text file

Optional data URL prefix for direct embedding

100% client-side - your images never leave your browser

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How to Convert Image to Base64

Upload Your Image

Click or drag and drop your image (PNG, JPG, GIF, WebP, SVG). Maximum file size is 10MB. The image is processed entirely in your browser for privacy.

Choose Output Format

Toggle whether to include the data URL prefix (data:image/png;base64,). Include it for direct use in HTML/CSS, or exclude it if you only need the encoded data.

Copy or Download

Click Copy to copy the Base64 string to your clipboard, or Download to save it as a text file. Use the Base64 string in your HTML, CSS, or JavaScript code.

Use Cases

Web Development

Embed small images, icons, and logos directly in HTML or CSS without separate HTTP requests. Perfect for favicons, UI elements, and critical above-the-fold images that need to load instantly.

Email Templates

Inline images in HTML emails to ensure they display correctly across all email clients. Base64 encoding prevents broken image links and ensures your email looks professional everywhere.

Data Storage & APIs

Store image data in JSON, databases, or transmit via APIs without dealing with file uploads. Useful for user avatars, product thumbnails, or any scenario where you need image data as text.

Frequently Asked Questions

What is Base64 encoding?

Base64 is a way to encode binary data (like images) as text. This allows you to embed images directly in HTML, CSS, or JavaScript without needing separate image files. It's commonly used for small images, icons, or when you want to reduce HTTP requests.

When should I use Base64 images?

Base64 is best for small images (under 10KB) like icons, logos, or UI elements. It reduces HTTP requests and can improve page load for small images. However, Base64 increases file size by about 33%, so it's not ideal for large images or photos.

What's the data URL prefix?

The data URL prefix (like data:image/png;base64,) tells browsers how to interpret the Base64 string. Include it when embedding directly in HTML src attributes or CSS url() functions. Exclude it if you're storing just the encoded data in a database or using it programmatically.

Is my image uploaded to a server?

No! This tool works 100% client-side in your browser using JavaScript. Your image never leaves your computer. The conversion happens locally for complete privacy and security.

How do I use Base64 images in HTML?

Use the Base64 string with the data URL prefix in an img tag: <img src='data:image/png;base64,iVBORw0K...' />. For CSS, use it in url(): background-image: url('data:image/png;base64,iVBORw0K...');. This embeds the image directly without a separate file.

What's the maximum image size?

This tool supports images up to 10MB. However, for Base64 encoding, smaller is better. Files under 10KB work best. Larger images increase your HTML/CSS file size significantly and can slow down page load times.