How to Decode Base64 Strings
Have you ever opened a code file or a database and found a massive block of random text starting with data:image/png;base64...? That is a Base64 encoded image. It's not meant for humans to read, but browsers can render it instantly.
The Open Tools Base64 Decoder allows you to paste that text block and see the actual image hidden inside. It is an essential utility for developers debugging APIs, email templates, or CSS files.
Common Issues with Base64 Strings
If your image isn't rendering, check for these common mistakes:
- Missing Header: A valid Data URI must start with the header, e.g.,
data:image/jpeg;base64,. If your string is just the raw code, try adding that prefix. - Broken Characters: If you copied the string from a terminal or log file, it might have extra line breaks or spaces. Our tool attempts to clean these, but a corrupted string cannot be decoded.
Supported Formats
Since Base64 is just a data encoding standard, this tool supports almost any image format, including:
- PNG (Transparency supported)
- JPG / JPEG (Photographs)
- GIF (Animated images)
- SVG (Vector graphics)
- WebP (Modern web images)
Frequently Asked Questions
Can I convert a PDF string to an image?
No. If the Base64 string represents a PDF file (starts with data:application/pdf), this tool cannot render it as an image. It only works for image mime-types.
Is the image uploaded?
No. The decoding happens 100% in your browser using JavaScript. We prioritize your privacy and never see the images you decode.