Image to Base64 Converter | Free Online Tool

Convert PNG, JPG, SVG, and other images to Base64 data URIs for embedding in HTML and CSS. 100% free, client-side processing with no ads, no tracking, and no cookies.

✓ 100% Ad-Free ✓ Privacy-First ✓ No Signup ✓ Zero Cookies

Input

Upload Image

Drop an image or click to upload

No size limit. Processed locally.

Output

Examples

PNG image converted to data URI for inline embedding

Input:

logo.png (5KB)

Output:

data:image/png;base64,iVBORw0KGgoAAAANSUhEUg...

SVG icon encoded for CSS background

Input:

icon.svg (2KB)

Output:

data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjQ...

When to Use This

Embedding small images directly in HTML or CSS
Creating portable HTML documents with inline images
Email templates where external images may be blocked
Single-file web components or demos

Related Tools

Base64 Encoder

Encode text and files to Base64

Base64 Decoder

Decode Base64 to original content

Text to Base64

Convert plain text to Base64

Base64 to Text

Decode Base64 to readable text

How It Works

Base64 is a binary-to-text encoding scheme that converts binary data into ASCII characters. The Base64 alphabet uses 64 characters: A-Z, a-z, 0-9, +, and / (with = for padding). This encoding is essential for transmitting binary data over text-based protocols like HTTP, JSON, and XML.

When you encode data, binary bytes are converted to a sequence of Base64 characters, increasing the size by approximately 33%.

Frequently Asked Questions

What is a data URI?

A data URI is a special URL format that embeds the actual data inline. For images, it looks like: data:image/png;base64,iVBORw0... This lets you use images without external file requests.

When should I embed images as Base64?

Base64 embedding is best for small images (icons, logos under 10KB). For larger images, file size increases by 33% and can slow down page load. Use HTTP/2 for larger images instead.

What image formats are supported?

All common formats: PNG, JPEG, GIF, WebP, SVG, BMP, ICO, and TIFF. The tool automatically detects the image type and generates the correct data URI prefix.

Is my image data private?

Yes. Your images are processed entirely in your browser. Nothing is uploaded to any server. Zero cookies, zero tracking, zero ads.

What is the file size limit?

There is no hard limit, but Base64 increases size by 33%. Very large images (over 1MB encoded) may slow down your page. For production use, consider HTTP/2 with proper caching instead.

Your Privacy is Protected

All Base64 encoding and decoding happens entirely in your browser. Your text and files never leave your device, are never sent to any server, and are never stored. We use zero cookies, zero tracking, and zero ads.