Base64 image strings show up in APIs, CSS, email templates, and debugging sessions, but they are impossible to inspect by sight. A viewer lets you decode the payload instantly so you can confirm what image is actually inside.
What Is the Base64 Image Viewer?
Base64 Image Viewer is one of the tools in WebdevToolbox’s Image & Media category. Paste a base64 string or data URL to preview, inspect, and download the decoded image. It runs entirely in your browser — no server uploads, no accounts, no waiting.
How to Use It
- Open the tool at /tools/base64-image-viewer.
- Paste the base64 string or full data URL into the input field.
- Review the decoded image preview and any displayed metadata or inspection details.
- Download the decoded image or copy the cleaned result you need for debugging.
Key Features
- 100% client-side — decoding happens locally, so encoded image data never leaves your browser.
- Base64 and data URL support — inspect either a raw payload or the full prefixed string.
- Instant image preview — confirm visually whether the encoded data is the file you expected.
- Downloadable output — save the decoded image when you need the actual asset file.
- Helpful for debugging — quickly spot broken payloads, wrong formats, or unexpected embedded images.
When to Use the Base64 Image Viewer
- API debugging — verify that a response field really contains the intended image.
- Email and CSS audits — inspect inline image data used in templates or embedded styles.
- Asset extraction — recover an image file from a base64 payload without writing a script.
Try It Now
Open Base64 Image Viewer and start using it right in your browser. No login required.
Part of the Image & Media collection on WebdevToolbox — free, browser-based developer tools with no login required.