Base64 Image Encoder Decoder

Convert images to Base64 data URLs, decode Base64 image strings, preview images, check size, MIME type, and copy clean output directly in your browser.

Choose What You Want to Do

Image File

Choose a PNG, JPG, WebP, GIF, SVG, or other image file. The image is read in your browser and is not uploaded.

Output Options

Output

Base64 image output will appear here.

Base64 image encoding and decoding happens directly in your browser. Your image file and pasted Base64 text are not uploaded to a server.

Converting Images to Base64 Data URLs

Base64 image strings are useful when you need to embed a small image directly inside HTML, CSS, JSON, email templates, or documentation. Instead of linking to a separate file, the image is stored as text.

This Base64 Image Encoder Decoder converts image files into Base64 data URLs and can also decode Base64 image strings back into a preview. It is useful for quick checks, small icons, test data, and places where an image needs to be copied as text.

Encoding or Decoding a Base64 Image

Choose Image to Base64 or Base64 to Image.
Upload an image file or paste a Base64 image string.
Select data URL, Base64-only, HTML img tag, or CSS url output.
Review the preview, MIME type, dimensions, and size notes.
Copy the output for your code, test data, or notes.

Common Base64 Image Converter Use Cases

Embedding a small icon inside HTML or CSS.
Creating a data URL for quick image testing.
Previewing a Base64 image copied from JSON or an API response.
Checking whether a Base64 image string is valid.
Converting SVG, PNG, JPG, GIF, or WebP images into text.
Preparing small image examples for documentation or bug reports.

Example Base64 Image Data URL

data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA...

When Base64 Images Are Useful

Base64 images work well for very small assets, examples, inline SVG previews, and quick test data. They are not always the best choice for large photos because Base64 text is usually larger than the original binary image.

For production websites, use Base64 images carefully. Large inline images can make HTML or CSS heavier and harder to cache separately.

Frequently Asked Questions

What is a Base64 image?

A Base64 image is an image converted into text. It is often used inside data URLs that start with data:image/type;base64.

Can this convert an image to a data URL?

Yes. Upload an image and choose Data URL output to get a full data:image/...;base64 string.

Can this decode Base64 back to an image?

Yes. Paste a Base64 image string or data URL and the tool will show a preview when the image is valid.

Does this upload my image?

No. Image reading and Base64 conversion happen directly in your browser.

Should I use Base64 for large images?

Usually no. Base64 can make large images heavier as text. It is better for small icons, SVGs, examples, or quick test data.