Are PixelTools free to use?

Yes, all 18 image tools on PixelTools are completely free with no limits, no account required, and no hidden fees.

Do my images get uploaded to a server?

Never. All processing happens locally in your browser using the Canvas API. Your files never leave your device.

What image formats are supported?

Most tools accept JPG, PNG, WEBP, and GIF. Output formats depend on the specific tool.

Is there a maximum file size?

No hard limit. Very large files (20MB+) may take a few seconds on older devices but will process correctly.

PixelTools

Browse Tools

Image to Base64 Converter

Encode any image to a Base64 string for use in HTML, CSS, or APIs. Free and browser-based.

Processed locally in your browser

Your files are not uploaded

Free and private

Drag & drop your image here

or click to browse

Supports PNG, JPG, WEBP, GIF, SVG

Image to Base64 Encoder — Free Online Tool

Base64 encoding converts binary image data into a text string that can be embedded directly in HTML, CSS, JavaScript, or JSON. This eliminates the need for a separate HTTP request to load the image, which can improve performance for small assets like icons and logos.

Web developers use Base64 images in email templates (where external images are often blocked), CSS background images, data URIs in HTML, and API payloads that require image data as text. Our tool generates the complete data URI string ready to paste directly into your code.

How to Use Image to Base64 Converter

1
Upload your image.
2
The Base64 encoded string is generated instantly.
3
Copy the string or download it as a text file.
4
Use the data URI directly in HTML img src or CSS background-image.

Frequently Asked Questions

What is Base64 encoding?

Base64 is a way to represent binary data (like images) as ASCII text. This allows images to be embedded directly in HTML, CSS, or JSON without a separate file request.

When should I use Base64 images?

Base64 is useful for small icons, logos, or images that need to be embedded inline. For large images, a separate file is more efficient as Base64 increases file size by ~33%.

Is the output a data URI?

Yes. The output includes the full data URI prefix (e.g. data:image/jpeg;base64,...) ready to use in HTML or CSS.