Image to Base64 Converter

Encode an image as a data URL, raw Base64, CSS, or HTML. Free, no account - and your file never leaves this browser tab.

Choose an image to encode

or click to browse - pasting a screenshot works too

JPG, PNG, WebP, GIF, or BMP up to 25MB

Processed on this device. Never uploaded.

How it works

Image to Base64 in 4 steps

Choose the image you want to encode.
Select data URL, raw Base64, CSS, or HTML output.
Review the encoded size shown with the image preview.
Copy the generated text into your project.

When to use it

Encode an image into text for source code, API payloads, email templates, or self-contained prototypes. Switch between a complete data URL, raw Base64, CSS background-image syntax, and an HTML image element.

Embed a small icon directly in HTML or CSS.
Create a Base64 image value for a JSON or API payload.
Build a self-contained prototype without separate image files.

Format & quality notes

Base64 is about 33% larger than the original binary file before text compression.
Use external image files for large assets so browsers can cache them independently.
Encoding reads the file locally; no image or Base64 text is uploaded.

FAQ

Questions about the Image to Base64 Converter.

What is the difference between raw Base64 and a data URL?

Raw Base64 contains only encoded bytes. A data URL adds the MIME type and Base64 marker so browsers can render it directly.

Does Base64 make an image smaller?

No. Base64 normally increases the uncompressed text size by roughly one third. It is useful for embedding, not compression.

Which images should I embed as Base64?

Small icons and one-off assets can be practical. Keep large photos external for better caching and maintainability.

Is the image uploaded for encoding?

No. The browser FileReader API creates the encoded text locally.