What is Base64 image encoding?

Base64 encoding converts image files to a plain text string. The resulting Data URI can be embedded directly in HTML/CSS without separate image files. Format: data:image/png;base64,iVBORw0KG...

What is Base64 encoding used for?

1. Embedding images in HTML emails; 2. Reducing HTTP requests (small icons); 3. CSS background images; 4. Transmitting images in JSON/XML; 5. Storing images in localStorage.

Will my image be uploaded to a server?

No. This tool uses the Canvas API to read and encode images locally. All processing happens on your device — nothing is transmitted over the network.

Free Online Base64 Image Encoder - Image to Data URI

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Updated: 2026-07-12

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Image to Base64

Free online Base64 image encoder. Convert images to Data URI format. Supports JPG, PNG, GIF, WebP, BMP, SVG. Client-side Canvas processing — images never leave your device.

📁

Drag & drop an image here, or click to select

Supports JPG / PNG / GIF / WebP / SVG / BMP

Waiting for image upload...

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📖 How to Use

Upload image: Drag an image or click to select. Supports common formats.

View result: Base64 Data URI is generated, with preview and file info.

Copy & use: Use in HTML img tags, CSS backgrounds, or data storage.

❓ FAQ

What is Base64 encoding?

Converts image files to plain text strings for embedding in HTML/CSS. Format: data:image/png;base64,iVBOR...

What is it used for?

HTML emails, reducing HTTP requests, CSS backgrounds, JSON/XML data transfer, localStorage storage.

Does it increase file size?

Yes, about 33% larger. Best for small icons and thumbnails under 10KB. This tool shows both sizes.

Is my image uploaded?

No. Everything happens locally using Canvas API. Images never leave your device.