What is Base64 encoding?

Base64 is a method of encoding binary data (like images) as plain text using 64 ASCII characters. This allows images to be embedded directly in HTML, CSS, or JSON without needing a separate file.

When should I use Base64 images?

Base64 is best for small images (under 10 KB) like icons, small logos, and UI elements. It reduces HTTP requests but increases file size by about 33%, so it is not ideal for large photographs.

A data URI is a Base64-encoded image prefixed with metadata like 'data:image/png;base64,'. It can be used directly in an img tag's src attribute or in CSS background-image declarations.

Does Base64 increase file size?

Yes, Base64 encoding increases the data size by approximately 33%. However, for small images, the elimination of an extra HTTP request often more than compensates for the larger inline size.

Can I decode Base64 back to an image?

Yes. Base64 encoding is reversible. You can paste a Base64 string into our tool to decode it back to a viewable and downloadable image file.

Why use Base64 in HTML emails?

Many email clients block external images by default. Base64-encoded images display immediately without the recipient needing to click 'load images', improving engagement with email content.

Image to Base64

Encode images as Base64 strings for embedding directly in HTML, CSS, or JSON without separate file requests.

Drop any image to convert to Base64

or click to browse

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jpeg

png

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Max file size: 50 MB

How to Use Image to Base64

Upload Your Image

Drag and drop or browse to select an image. Supports JPG, PNG, WebP, GIF, SVG, BMP, and ICO formats.

Choose Output Format

Select from data URI, CSS background-image, raw Base64, or img tag format. Copy the generated code with one click.

Copy or Download

Copy the Base64 string to your clipboard or download it as a text file for use in your project.

About Image to Base64

Base64 encoding converts binary image data into a text string that can be embedded directly in HTML, CSS, JavaScript, or JSON files. PicTools' Image to Base64 encoder handles this conversion instantly in your browser, generating ready-to-use data URIs, raw Base64 strings, and CSS background-image snippets.

Embedding images as Base64 data URIs is a powerful technique for reducing HTTP requests and simplifying asset management. Instead of referencing an external image file, you can inline the image directly in your code. This is particularly valuable for small images like icons, logos, sprites, and UI elements where the overhead of an additional HTTP request outweighs the cost of a slightly larger HTML or CSS file.

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