This tool decodes Base64-encoded image data back into a visible image that you can preview and download. Paste a Base64 string or a full data URI (data:image/png;base64,...) and the image is rendered instantly in your browser. Useful for debugging embedded images in HTML emails, CSS files, and API responses.
Accepts both raw Base64 and Data URI format (data:image/png;base64,...)
Paste a Base64-encoded image string into the input field - either a raw Base64 string or a complete data URI starting with 'data:image/...'. The tool automatically detects the image format, renders a preview, and displays the image dimensions and file size. Download the decoded image in its original detected format.
Base64-to-image decoding is essential for debugging embedded images in HTML emails, inspecting data URIs found in CSS stylesheets, recovering images from API responses that return Base64-encoded data, viewing images stored as Base64 strings in databases or configuration files, and extracting images from JSON Web Tokens or other encoded payloads that contain image data.
The tool parses the data URI scheme to extract the MIME type and Base64 data. If no data URI prefix is present, it attempts to detect the image format from the decoded binary signature (magic bytes): PNG starts with 0x89504E47, JPEG with 0xFFD8FF, GIF with 0x47494638. The decoded data is converted to a Blob URL using URL.createObjectURL() for rendering in an img element, and a download link is generated using the Blob API.
Paste the Base64 string (with or without the data:image/... prefix) into the input field. The tool detects the image format, renders a preview, and lets you download the image file.
The tool supports any image format that browsers can render: PNG, JPEG, GIF, WebP, SVG, BMP, and ICO. The format is detected from the data URI prefix or inferred from the decoded data.
Common issues include incomplete Base64 strings (check for truncation), incorrect data URI format, or corrupted encoding. Ensure the string contains only valid Base64 characters (A-Z, a-z, 0-9, +, /, =).
Convert images to Base64-encoded data URIs for embedding in HTML and CSS.
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