Explosion Tools

Base64 Image Encoder

Convert images to Base64 data URIs and back. Kostenlos, ohne Anmeldung, funktioniert im Browser.

Bild hierher ziehen und ablegen, oder Datei auswählen

PNG, JPG, WEBP, GIF, BMP — bis zu 25 MB

Ihre Bilder werden vollständig in Ihrem Browser verarbeitet. Es wird nichts auf einen Server hochgeladen.

Über Base64 Image Encoder

This tool converts images to Base64-encoded data URIs and decodes Base64 strings back to viewable images. Drag and drop or select an image file (up to 5 MB) to get the Base64 string, complete data URI, and a ready-to-use HTML img tag. Or paste a Base64 string to preview the decoded image. Data URIs are useful for embedding small images directly in HTML, CSS, or JSON without separate file requests — reducing HTTP round-trips for icons, logos, and thumbnails.

Häufig gestellte Fragen

What image formats are supported?
All standard web image formats: PNG, JPEG, GIF, WebP, SVG, ICO, and BMP. The tool uses the browser's FileReader API, which handles any format your browser can display.
Why is the Base64 string larger than the original image?
Base64 encoding represents 3 bytes of data using 4 ASCII characters, resulting in a ~33% size increase. For small images (under ~10 KB), the trade-off is worthwhile because you eliminate an HTTP request. For larger images, use regular file hosting.
Can I use data URIs in CSS?
Yes. Use the data URI in a CSS background-image property: background-image: url('data:image/png;base64,...'). This is common for small icons and patterns to avoid extra network requests.

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