Base64 to Image

What happens when you paste raw Base64 without the data: prefix

This tool runs on the Blazor Server circuit — your pasted text is sent to our server over your live connection to be decoded, and the result is sent back; it's never forwarded to a separate API or third-party service, and nothing is stored or logged beyond that request. If you paste a full data URL starting with data:image/..., the tool reads the MIME type directly from that prefix to identify the image format. If you paste raw Base64 without the prefix, the tool hardcodes image/png regardless of what the binary data actually encodes — the reconstructed URL becomes data:image/png;base64,{your data}. For JPEG, WebP, or GIF data pasted as raw Base64, the browser receives a data URL claiming PNG but containing a different format's binary. Modern browsers usually sniff the actual binary signature and render it correctly anyway, but it's not guaranteed — some contexts or strict-mode parsers reject a MIME-type mismatch. If a raw JPEG Base64 string isn't rendering, paste the full data:image/jpeg;base64, prefix manually and the browser will have the correct type hint.

What is Base64 to Image?

Base64 to Image decodes a Base64-encoded data URL back into a viewable and downloadable image. When an API returns image data as a Base64 string, when you need to verify what an encoded image looks like, or when you find a data URL in HTML or CSS source and want to see the actual image, this tool renders it instantly. Unlike most tools on this site, it makes no call to a separate API service — the validation and data URL construction all happen directly in the Blazor Server circuit, so the only trip is the normal round trip between your browser and the Blazor Server for the rendered result. Nothing is stored or logged beyond that request.

How to use this tool

1. Paste your Base64 data URL into the input field. The full format is data:image/png;base64,iVBORw0KGgo...
2. You can also paste just the raw Base64 string without the data:... prefix — the tool defaults to PNG in that case.
3. Click Decode.
4. The image is rendered in the output panel.
5. Right-click the image to save it, or use your browser's download option.

Understanding MIME types in data URLs

The MIME type in the data URL tells the browser what kind of file the data represents. Common image MIME types:

• data:image/png;base64,... — PNG image (lossless, supports transparency)
• data:image/jpeg;base64,... or data:image/jpg;base64,... — JPEG image (lossy, no transparency, smaller file size for photographs)
• data:image/gif;base64,... — GIF image (limited colours, supports simple animation)
• data:image/webp;base64,... — WebP image (modern format, better compression than JPEG and PNG)
• data:image/svg+xml;base64,... — SVG vector image encoded as Base64

If the MIME type is missing or wrong, the browser may refuse to render the image or display a broken image icon. This tool detects the content type from the data URL prefix and displays it alongside the decoded image.

When valid Base64 still doesn't render

The only validation this tool performs is checking that the string is valid Base64 — it confirms the character set and padding are correct, but has no way to confirm the decoded bytes actually represent a recognizable image format. You can paste valid Base64 of a PDF, a ZIP file, or even random bytes, and the tool will report no error (the Base64 itself is valid) but the browser will show a broken image icon because what was decoded isn't a displayable image. If the tool shows no error but the image area is blank or broken, the data is valid Base64 but not a valid image.

Common debugging scenarios

• API returning Base64 images: Some APIs return avatar photos, generated charts, or QR codes as Base64 strings in JSON responses. Paste the string here to verify the image looks correct before writing client-side rendering code.
• Extracting images from HTML source: When scraping or inspecting a page that inlines images as data URLs, paste the data URL here to preview and save the image as a file.
• Verifying encoded assets: When using the Image to Base64 tool to generate a data URL, use this tool to confirm the round-trip is correct — encode, then decode and compare with the original.
• Database-stored images: Some applications store images as Base64 strings in the database. This tool lets you quickly inspect a stored value without writing decoding code.