Base64 guide
How to Convert Base64 to Image Online
Base64 image strings are common in APIs, JSON payloads, email templates, CSS files and quick prototypes. This guide explains how to turn a Base64 string back into a real image, preview it, and download it safely.
What is a Base64 image?
A Base64 image is binary image data represented as text. Instead of uploading a separate file, the image can be embedded inside HTML, CSS, JSON or another text-based format.
A typical data URL starts with a MIME type and then the encoded content:
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAA... The prefix tells the browser what type of image it is. The long text after base64, is the encoded image content.
How to convert Base64 to an image
When should you use Base64 images?
- Testing image responses from APIs.
- Debugging JSON fields that contain image data.
- Embedding small icons directly in HTML or CSS.
- Checking whether a Base64 string is valid image data.
- Recovering an image from logs, database fields or copied snippets.
Common problems
The string is incomplete
If the Base64 string was copied from a log or shortened by a UI, the image will not decode correctly. Make sure the full string is copied.
The MIME type is missing
Many tools can still detect PNG, JPG, GIF, SVG, WebP and other formats, but adding the correct prefix helps browsers understand the image immediately.
The file is too large
Base64 text is larger than the original binary file. Very large images can be slow to paste, render or copy.
Try it now
Paste your Base64 string and convert it into an image directly in your browser.
Open Base64 to Image Tool
