Base64 to Image Decoder And Previewer Online
Instantly paste a Base64 string to preview and download it as an image file. 100% free, safe, and works entirely in your browser without tracking.
Instantly visualize any Base64 visual data. Paste your long Base64 string below to preview the image, check its dimensions, and download it to your device locally.
Image preview will appear here
How to Use Base64 to Image Decoder And Previewer Online
- Paste your Base64 encoded string into the input text area. It can either include the
data:image/png;base64,prefix or just be the raw code. - Click Decode Image.
- If the code is valid, our browser engine will reconstruct the image and display it on the right side.
- You can check its native dimensions and click Download Image to export it as a standard file.
Frequently Asked Questions
Is my Base64 data secure when using this tool?
Yes. All decoding happens 100% client-side in your browser. Your Base64 strings never leave your device.
Is this Base64 to image converter free?
Absolutely. This tool is completely free with unlimited conversions and no restrictions.
Does this work offline?
Yes, once the page loads, you can decode Base64 images entirely offline without an internet connection.
Is my Base64 string sent to a server?
Absolutely not. This decode operation is executed 100% locally within your own browser. We never log or upload any part of your data, guaranteeing complete confidentiality.
Why is it saying “Invalid Image Data”?
This happens when the string you pasted is corrupted, missing characters, or is not actually representing an image format (e.g., if you pasted a Base64 encoded PDF or text document by mistake).
Do I need to include the MIME type header?
It is recommended, but not strictly required. If your string lacks a header (like data:image/jpeg;base64,), our tool will attempt to automatically append a PNG header to force the browser to render it.
What image formats can I decode?
All standard formats including PNG, JPG/JPEG, GIF, WEBP, SVG, and BMP encoded as Base64 strings.
How do I download the decoded image?
After decoding, click the “Download Image” button to save the image file directly to your device.
Can I see the image dimensions before downloading?
Yes, the tool displays the width and height in pixels in the result metadata section after successful decoding.
What if my Base64 string is very long?
No problem. The tool handles large Base64 strings, though very large images (10MB+) may take a moment to decode depending on your device.