How Base64 Image Decoding Works
Base64 image strings represent binary image pixels as ASCII text. Decoding transforms these 6-bit chunks back into an 8-bit binary stream, allowing your browser's rendering engine to paint the image on screen and save it as a physical file.
Supported MIME Types & Signatures
image/png: Starts withiVBORw0KGgoimage/jpeg: Starts with/9j/image/webp: Starts withUklGRimage/svg+xml: Starts withPHN2ZyorPD94bWwimage/gif: Starts withR0lGOD
Frequently Asked Questions
How do I convert a Base64 string back into an image file?
Paste your raw Base64 string or Data URI (e.g., data:image/png;base64,iVBORw0KGgo...) into the input box. The tool automatically detects image MIME types (PNG, JPEG, WebP, SVG, GIF, ICO) and renders a live image preview with a one-click 'Download Image File' button.
Which image formats are supported by the Base64 to Image decoder?
Our decoder supports PNG, JPEG, WebP, SVG, GIF, BMP, and ICO. It automatically parses magic byte headers (e.g. /9j/ for JPEG, iVBOR for PNG, PHN2Zy for SVG) to render the correct image format.
Can I decode Base64 images without data:image/png;base64 prefix?
Yes! If you paste a raw Base64 string without the 'data:image/...' prefix, the tool detects the binary signature and wraps it with the appropriate Data URI header automatically.
Is my image uploaded to any external server?
No, 100% private. Decoding happens entirely in your local browser JavaScript memory without transmitting image data over the internet.
How do I embed a decoded Base64 image in HTML or CSS?
In HTML, use '<img src="data:image/png;base64,..." alt="Image" />'. In CSS, use 'background-image: url("data:image/png;base64,...");'.
What is the maximum Base64 image size supported?
Since processing runs in client memory, you can decode high-resolution images up to several tens of megabytes directly in modern browsers without server upload timeouts.