Image to Base64

This converter creates a copyable data URI from a small image selected through the browser file picker, making the MIME type and Base64 representation visible for testing.

Last updated: October 17, 2026  •  Published by: NOFYI Editorial Team  •  Category: Image Tools

Workspace

The Image to Base64 tool converts an image file into a Base64 text string. The string is a text version of the image that you can paste into HTML, CSS, or code where a file upload is not possible. It is for small images, icons, and simple graphics that need to be embedded directly in a page or stylesheet.

What Is Image to Base64

Image to Base64 reads an image file and encodes its bytes as Base64 text. The result is usually shown as a data URI that starts with data:image/…;base64, followed by the encoded text. A browser can read that data URI as an image, so you can use it in place of a file URL.

How to Use

  1. Choose an image file with the Choose Image control. Supported types shown are PNG, JPG, WebP, GIF, BMP, and SVG.
  2. Click Process.
  3. Use the result shown on the page to copy the Base64 text or data URI.
  4. Paste the result into your HTML or CSS and test the page in the browser.

Worked Example

Example input: a small PNG icon, for example a 32 by 32 logo.

Steps: Choose that PNG, click Process, then copy the result.

Expected output: a data URI starting with data:image/png;base64, followed by a long text string. Example use in HTML: <img src=”data:image/png;base64,…” alt=”Logo”>. Replace the dots with the full string from the Result. Keep the image small, because Base64 text is about one third larger than the original file.

Limitations

  • No Download or Copy button is shown in the workspace before processing. The workspace shows only Choose Image, Process, and Clear. Use the result shown after processing.
  • No quality, size, or format control is shown. There is no quality slider or output-dimension control to choose before processing.
  • No EXIF control is shown. Do not assume metadata is kept or removed. Check the output if metadata matters.
  • Base64 does not compress the image. The text is about 33 percent larger than the original file, so large images produce very long strings that are hard to paste and slow to load.
  • SVG files are text, not bitmap images. Encoding an SVG as Base64 makes it larger and harder to edit. For SVG, linking the file or inlining the SVG markup is usually better.
  • Embedded images cannot be cached separately by the browser. Use Base64 for small icons, not for large photos.

Frequently Asked Questions

What is Base64?

Base64 is a way to represent binary data, such as an image file, as plain text using letters, digits, and a few symbols. It lets you embed an image in code as text.

Why is the Base64 string longer than the file?

Base64 encoding expands data by about one third. A 30 KB image becomes about 40 KB of text. That is why Base64 is best for small images.

Can I use the result in CSS?

Yes. Paste the data URI into a url() value, for example: background-image: url(data:image/png;base64,…); Test the page, because a long string makes the stylesheet harder to read.

Do I need to install anything?

No. The tool runs in the browser. Choose an image, click Process, and use the result.

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