Base64 Image Decoder
Decode Base64 encoded images and view them instantly. Convert Base64 strings back to viewable images with automatic format detection for PNG, JPEG, GIF, and WebP. Download the decoded image or preview it directly in your browser.
How Base64 Image Decoding Works
Base64 encoding converts binary image data into ASCII text that can be safely transmitted in text-based formats like JSON, HTML, CSS, and email. Decoding reverses this process, converting the text back into the original binary image data.
Our decoder automatically detects the image format by examining the decoded binary data's magic bytes - the unique signature at the start of each image format. This means you don't need to know or specify the image type; it's detected automatically.
Supported Formats
- PNG: Magic bytes 89 50 4E 47
- JPEG: Magic bytes FF D8 FF
- GIF: Magic bytes 47 49 46
- WebP: Magic bytes 52 49 46 46
Common Use Cases
View images embedded in JSON API responses, decode data URIs from HTML/CSS, recover images from encoded email attachments, debug Base64 encoded assets in web applications, and convert inline images to downloadable files.