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Base64 to Image Converter

Paste a Base64 string or a full data URL to preview the decoded image and save it to your device, entirely in your browser.

How to use this tool

  1. 1

    Paste your Base64 payload or full data URL (data:image/...) into the text box. Leading and trailing whitespace in a raw Base64 string is stripped automatically.

  2. 2

    The decoded image appears as a live preview the moment the browser can render it; if the data cannot be decoded, an 'Invalid Base64 image data' message is shown instead.

  3. 3

    Click the Download button to save the image to your device as image.png.

What does a Base64-to-image converter actually do?

Base64 is a text encoding that represents binary data using 64 printable ASCII characters (A-Z, a-z, 0-9, + and /, with = as padding). Images are often Base64-encoded so they can be embedded directly inside text-based files such as HTML, CSS, JSON, or SVG using a data URL like data:image/png;base64,iVBORw0KGgo... This converter reverses that process: it takes the encoded text and hands it to the browser as an image source so you can view and save the original picture. The tool accepts either a complete data URL or just the raw Base64 payload. If you paste only the payload, it is wrapped with the data:image/png;base64, prefix, so raw input is always treated as PNG even if the underlying bytes are actually JPEG, GIF, or WebP. Validation is intentionally simple: rather than parsing the byte stream, the tool asks the browser to load the data into an Image element and reports an error only if that load fails. Because decoding happens through your browser, the actual image format is inferred from a real data URL but defaults to PNG for bare payloads, and the saved file is always named image.png regardless of the source type.

Common use cases

  • Recovering an icon or logo that a previous developer hard-coded as a data URL inside a CSS or HTML file, so you can save it back to a real .png file.

  • Inspecting a Base64 image string returned by an API or stored in a JSON payload to confirm it actually decodes to the picture you expect.

  • Pulling an embedded image out of an SVG or email template where assets were inlined as data URLs to reduce HTTP requests.

  • Quickly verifying that a Base64 string copied from logs, a database column, or a clipboard snippet is a valid, renderable image.

  • Extracting a screenshot or avatar that a tool exported as a data URL when you need the binary file instead of the text blob.

  • Teaching or demonstrating how data URLs work by pasting an encoded string and watching it render live in the preview.

Frequently asked questions

Does it accept just the Base64 string, or do I need the full data URL?▼
Both work. If you paste a full data URL beginning with data:, it is used as-is. If you paste only the raw Base64 payload, the tool wraps it with data:image/png;base64, before decoding.
Why does my JPEG or GIF still download as a PNG?▼
When you paste a raw payload without the data: prefix, the tool always assumes image/png and the download is hard-coded to the filename image.png. The browser can usually still render the real format, but the file extension may not match the actual bytes. To keep the correct type, paste the full data URL (for example data:image/jpeg;base64,...) and rename the downloaded file accordingly.
Is my image data uploaded to a server?▼
No. Decoding, preview, and download all happen locally in your browser using a standard data URL and an in-memory Image element. The Base64 text you paste is never sent anywhere.
What does the 'Invalid Base64 image data' error mean?▼
The tool does not parse the Base64 bytes itself; it asks the browser to load your input as an image. That error appears when the browser cannot decode the result into a valid image, usually because the string is truncated, corrupted, contains non-Base64 characters, or is not actually image data.
Does whitespace or line breaks in the string cause problems?▼
For a raw Base64 payload, all whitespace (spaces, tabs, and newlines) is stripped before decoding, so wrapped or multi-line strings are fine. Note that this whitespace cleanup is only applied to bare payloads, not to input that already starts with data:.
Is there a size limit on the image?▼
There is no fixed limit imposed by the tool, but very large Base64 strings consume memory in your browser tab and may render slowly. Browsers also vary in how large a data URL they will accept, so extremely large inputs can fail to display.

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