Image to Base64 Converter

Upload any image and get its Base64 encoded string instantly — processed entirely in your browser.

1 Upload Image

What is Base64 Image Encoding?

  • Embed Images in HTML/CSS — Use Base64 strings directly in src or background-image without a separate file.
  • API Payloads — Send images as JSON strings in REST API requests.
  • Email Templates — Embed images inline in HTML emails.
  • 100% Private — No data ever leaves your browser.

Frequently Asked Questions

What is Base64 image encoding? +
Base64 encodes binary image data as a text string, letting you embed images directly in HTML, CSS, or JSON without a separate file request.
When should I use Base64 images? +
For small icons or inline email images. Large images should remain as separate files — Base64 encoding adds ~33% to file size.
Can I decode Base64 back to an image? +
Yes. Paste your Base64 string into the Decode tab and the tool previews and lets you download the original image.
Does the output include the data URI prefix? +
Yes. The full data URI (e.g. data:image/png;base64,...) is included, ready to paste into HTML or CSS.
Is there a file size limit? +
Up to 10 MB. Larger images produce very long Base64 strings that are impractical to embed inline.