A Base64 to image converter decodes a Base64 text string back into a real image file. This free tool lets you convert Base64 to an image online: paste the Base64 (with or without the data:image prefix), and it detects the format, previews the image, shows its size and dimensions, and lets you download it. Everything runs in your browser, so the data never leaves your device.
Got a long Base64 string and need the actual image back? Paste it above and convert it to a viewable, downloadable image in one click. It works whether or not your string starts with data:image/png;base64,.
The tool auto-detects PNG, JPG, GIF, WebP, SVG and BMP, shows a live preview, and gives you a clean file to download. Nothing is uploaded, decoding happens on your device.
Key takeaways
- Paste a Base64 string or full data URI and get a real image you can preview and download.
- Auto-detects the format: PNG, JPG, GIF, WebP, SVG and BMP.
- Shows the decoded file size and pixel dimensions so you can verify it.
- Runs fully in your browser. Your data is never uploaded, so it stays private.
Why use this base64 to image converter?
Prefix optional
Works with or without the data:image prefix. Paste raw Base64 or a full data URI.
Auto format detection
Detects PNG, JPG, GIF, WebP, SVG or BMP from the data itself.
Private, no upload
Decoding happens on your device. The Base64 never touches a server.
Preview and download
See the image first, check its size and dimensions, then download the file.
How to use it
- Paste your Base64 string or data URI into the box above.
- Click Convert. The tool decodes it and detects the image format.
- Check the preview, along with the detected format, size and dimensions.
- Click Download to save the image, named with the correct extension.
- If it fails, make sure you copied the full, unbroken Base64 string.
How to convert Base64 to an image
Three steps:
- Paste your Base64 string in the box above. It can start with
data:image/png;base64,or be raw Base64. - Click Convert. The tool decodes it and shows a preview.
- Click Download to save the image with the right file extension.
What is Base64 and a data URI?
Base64 is a way to represent binary data, like an image, using only text characters. Developers embed images directly in HTML, CSS or JSON as a data URI, which looks like data:image/png;base64,iVBORw0KGgo…. The part after the comma is the Base64 image data. This tool turns that text back into the original image file.
Which image formats are supported?
| Format | Base64 usually starts with |
|---|---|
| PNG | iVBORw0KGgo |
| JPG / JPEG | /9j/ |
| GIF | R0lGOD |
| WebP | UklGR |
| SVG | PHN2Zy or PD94 |
| BMP | Qk |
The tool reads these signatures automatically, so you do not need to know the format in advance.
Do I need the data:image prefix?
No. You can paste either a full data URI (with data:image/…;base64, at the front) or just the raw Base64 after it. The tool handles both, detects the correct format, and rebuilds a valid image either way.
Why is my Base64 not converting?
The most common reason is an incomplete or broken string. Base64 copied across multiple lines, or cut off at the start or end, will not decode. Make sure you copied the entire string. Also confirm it is actually image data and not Base64 of a different file type, such as a PDF or font.
Is it safe to paste Base64 here?
Yes. Decoding happens entirely in your browser using JavaScript, and the image is built as a local data URL. Your Base64 is never sent to us or any server, so even private images stay on your device. It also works offline once the page has loaded.
Popular use cases
- Turning a Base64 data URI from HTML, CSS or JSON back into an image file.
- Previewing what a Base64 string actually contains before using it.
- Extracting an embedded image from code or an API response.
- Downloading an icon or logo that was stored as Base64.
- Debugging a data URI that is not rendering as expected.
Frequently asked questions
How do I convert Base64 to an image?
Paste your Base64 string or data URI into the box above and click Convert. The tool decodes it, previews the image, and lets you download it with the correct file extension. It all runs in your browser.
Do I need the data:image prefix?
No. You can paste a full data URI (starting with data:image/…;base64,) or just the raw Base64. The tool detects the format and rebuilds a valid image either way.
Which image formats does it support?
It auto-detects and converts PNG, JPG or JPEG, GIF, WebP, SVG and BMP by reading the signature at the start of the data.
Is my Base64 data uploaded anywhere?
No. Decoding happens locally in your browser, so your Base64 and the resulting image never leave your device. It even works offline once loaded.
Why does my Base64 fail to convert?
Usually the string is incomplete or broke across lines when copied. Copy the entire, unbroken string and try again. Also make sure it is image data, not Base64 of another file type.
Can I convert a very large Base64 string?
Yes, within your browser memory limits. Large strings decode fine, though a very large image may take a moment to render.
Can I download the converted image?
Yes. After converting, click Download to save the image file, named automatically with the detected extension like .png or .jpg.
Is this Base64 to image tool free?
Yes, completely free with no signup, no limits and no watermark. Convert as many strings as you like.
Want this done for you?
We build fast, SEO-ready websites and run digital marketing for businesses across Noida & Delhi NCR.