Type detection
The decoder checks the Data URI and decoded magic bytes instead of trusting a label alone.
Developer · Free, no signup
Convert Base64 to an image
Paste a Base64 blob and immediately see its detected type, dimensions, and decoded size.
- No watermark
- Stays in your browser
- Real quality controls
Runs here in your browser. Very large values are blocked before decoding to protect the tab.
Your decoded image appears here.
Browser-only tool. The image or Base64 value is not uploaded.
Three clean steps
Get the result, then get on with it
The workspace keeps choices close to the file. Explanations stay down here.
- Paste a Base64 value or Data URI.
- Decode and inspect the detected image.
- Download the original decoded bytes.
Worth knowing
Convert Base64 to an image, with the tradeoffs visible
SVG safety
Decoded SVG is never injected as active page markup.
Solve the whole problem
Useful guides for this tool
01
Base64 images explained
Learn what Base64 is, why it adds overhead, when Data URIs help, and when normal image files are better.
Read and use the tool ↗02How to decode Base64 to an image safely
Normalize a Base64 value, detect the real image type from bytes, preview it safely, and download the result.
Read and use the tool ↗03How to embed a Base64 image in HTML or CSS
Create a Data URI, place it in HTML or CSS, and know when a normal image URL is the better choice.
Read and use the tool ↗04The best image format for the web
Choose image formats by content, compatibility, alpha, animation, and performance rather than fashion.
Read and use the tool ↗05Image optimization for Core Web Vitals
Improve image loading with responsive dimensions, stable layout space, compression, priority, and measured page testing.
Read and use the tool ↗