Is the Image to Base64 free to use?

Yes, the Image to Base64 is completely free. No account, subscription, or signup is required — ever.

Does my data get uploaded anywhere?

No. The Image to Base64 runs entirely in your browser. Your data is never sent to any server.

Does it work offline?

Yes. Once the page has loaded, the tool works without an internet connection.

Which browsers are supported?

All modern browsers — Chrome, Firefox, Safari, and Edge. No plugins or extensions required.

Why is the Base64 string larger than the original image?

Base64 encoding converts binary data into ASCII text using only 64 characters. This encoding increases the data size by approximately 33–37%. For this reason, Base64 embedding is best suited to small images (icons, logos under 10 KB).

Can I use the Base64 Data URL directly in HTML?

Yes — select the Data URL format and use the output as the src attribute of an <img> tag. Select HTML img tag to get the complete ready-to-paste tag.

Image to Base64

Convert images to Base64 encoded strings for use in CSS and HTML.

Drop an image here or click to upload

PNG, JPG, WebP, GIF — any image format

What is the Free Image to Base64?

The free Image to Base64 Converter encodes any image as a Base64 string in four output formats: Data URL (ready to use as an src attribute), Base64 only (raw string without prefix), CSS bg-image (background-image: url("...")), or HTML img tag (<img src="...">). Drop your image, click the desired output format button, and the encoded string appears in the output textarea. Stats show the original file size, Base64 size, and the overhead percentage. Copy to clipboard or download as a .txt file.

→ Embedding small icons or logos directly in CSS to eliminate HTTP requests
→ Inlining images in HTML email templates that work without external links
→ Embedding images in JSON API responses or configuration files
→ Converting images for use in data URIs in web applications

How to Use the Free Image to Base64

1 Drop or select your image in the drop zone.
2 Click an output format button: Data URL, Base64 only, CSS bg-image, or HTML img tag.
3 The encoded string appears in the output textarea.
4 Check the size stats: original size, Base64 size, and overhead %.
5 Click Copy to copy the string to clipboard, or Download .txt to save it.

Key Features

🔢
Four output formats

Data URL, Base64 only, CSS background-image, and HTML img tag — one click to switch.
📊
Size statistics

Shows original file size, Base64 encoded size, and overhead percentage for informed decision-making.
📋
Copy to clipboard

Copy the entire encoded string in one click, ready to paste into code.
⬇️
Download as .txt

Save the Base64 string as a text file for later use.
🆓
Free, browser-based

Encoding runs locally — your image is never sent to any server.

Example Usage

Example Input

Upload: icon.png (2.1 KB) · Output: Data URL

Example Output

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgA... (+37% overhead vs original)

Frequently Asked Questions about the Free Image to Base64

What is the free Image to Base64?: Convert images to Base64 encoded strings for use in CSS and HTML.
Is the Image to Base64 free to use?: Yes, the Image to Base64 is completely free. No account, subscription, or signup is required — ever.
Does my data get uploaded anywhere?: No. The Image to Base64 runs entirely in your browser. Your data is never sent to any server.
Does it work offline?: Yes. Once the page has loaded, the tool works without an internet connection.
Which browsers are supported?: All modern browsers — Chrome, Firefox, Safari, and Edge. No plugins or extensions required.
Why is the Base64 string larger than the original image?: Base64 encoding converts binary data into ASCII text using only 64 characters. This encoding increases the data size by approximately 33–37%. For this reason, Base64 embedding is best suited to small images (icons, logos under 10 KB).
Can I use the Base64 Data URL directly in HTML?: Yes — select the <strong>Data URL</strong> format and use the output as the <code>src</code> attribute of an <code><img></code> tag. Select <strong>HTML img tag</strong> to get the complete ready-to-paste tag.