画像を Base64 に変換 オンライン
画像をアップロードして Base64 エンコード文字列またはデータ URL を即座に取得します。
クリックまたは画像をここにドラッグ＆ドロップ
PNG、JPEG、GIF、WebP、SVG、BMP に対応
What Is Image to Base64 Converter?
Image to Base64 Converter is a free online tool that encodes any image file into a Base64 string or data URL. The encoded output can be embedded directly into HTML, CSS, or JSON — eliminating the need for a separate image file. It is commonly used for embedding small icons, logos, and thumbnails in web pages and API payloads.
How to Use Image to Base64 Converter
- Click the drop zone or drag and drop an image file onto it.
- The tool instantly encodes the image and displays both the full data URL and the Base64-only string.
- Click Copy next to either output to copy it to your clipboard.
Features
- Supports PNG, JPEG, GIF, WebP, SVG, BMP, and more
- Outputs both full data URL and Base64-only string
- Drag-and-drop or click-to-upload interface
- Image preview with file name and size
- Runs entirely in your browser — zero data uploaded
FAQ
What image formats are supported?
The tool supports all common image formats including PNG, JPEG, GIF, WebP, SVG, and BMP.
What is the difference between a data URL and Base64?
A data URL includes the MIME type prefix (e.g. data:image/png;base64,...) and can be used directly in HTML img src or CSS background-image. The Base64-only string is just the encoded data without the prefix.
Is my image uploaded to a server?
No. The image is read and encoded entirely in your browser using the FileReader API. Your image never leaves your device.