Base64 to Image Converter — Free Online
Paste a Base64 data URL or raw Base64 string and decode it back to an image instantly. Preview and download — 100% browser-based.
What Is a Base64 Image String?
A Base64 image string is a text representation of a binary image file. Instead of storing the image as a separate file, the image data is encoded into a long string of ASCII characters and prefixed with a MIME type declaration. The complete string is called a data URL and looks like:
data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQ...The prefix data:image/jpeg;base64, tells the browser the data type and encoding. The long string after the comma is the actual image — the same binary data you would find in a .jpg file, just represented as text. Decoding reverses this: the text is converted back to binary, producing the original image.
Where Do Base64 Image Strings Come From?
| Source | How to get the string |
|---|---|
| HTML source code | Right-click → View Source, find img src="data:image/..." |
| CSS stylesheet | Find background-image: url("data:image/...") in CSS |
| JSON API response | Copy the value of an image field from the API response body |
| Database record | Images stored as text in a database column |
| Our Image to Base64 tool | Upload any photo to generate its Base64 string |
| JavaScript canvas | canvas.toDataURL() returns a Base64 data URL |
How to Convert Base64 to Image — 3 Steps
- 1
Paste your Base64 string
Paste the full data URL (starting with
data:image/jpeg;base64,) or a raw Base64 string without the prefix. The tool handles both. - 2
Click Decode Image
The tool validates the string and renders the decoded image as a preview. If the string is invalid or incomplete, an error message explains what went wrong.
- 3
Download the image
Click Download to save the decoded image as a JPEG file. The file contains only pixel data — ready to use like any other image file.
Supported Base64 Image Formats
This tool accepts Base64 strings for the following image types:
data:image/jpeg;base64,...JPEG images — the most common format for photographs and compressed images.
data:image/png;base64,...PNG images — lossless compression, supports transparency.
data:image/webp;base64,...WebP images — modern format with better compression than JPEG and PNG.
data:image/gif;base64,...GIF images — limited palette, often used for simple animations.
Raw Base64 (no prefix)Plain Base64 strings without the data URL prefix are treated as JPEG by default.
Decoding Is Lossless
Base64 decoding reconstructs the exact original binary data. The decoded image is pixel-identical to what was encoded — no quality loss occurs during the encoding or decoding process. Any quality difference you notice is from the original JPEG compression that was applied before encoding, not from the Base64 step itself.