Image to Base64 Converter Online
Convert images to Base64-encoded strings instantly in your browser. This free tool processes your images entirely client-side — no files are uploaded to any server.
Image to Base64 Converter
Convert images to Base64 data URIs or decode Base64 strings back to images. All processing happens in your browser.
Drop an image here or click to browse
PNG, JPG, GIF, SVG, WebP, ICO, BMP — max 10 MB
About Image to Base64 Conversion
Base64 encoding converts binary image data into an ASCII text string. This is useful for embedding images directly in HTML, CSS, or JSON without separate file requests.
Data URI format: data:image/png;base64,iVBORw0KGgo... — ready to use in <img src="..." /> tags or CSS url(...).
Size overhead: Base64 increases data size by approximately 33%. For small images (icons, logos under ~5 KB), the trade-off of eliminating an HTTP request is usually worth it. For larger images, serving the file directly is more efficient.
Supported formats: PNG, JPEG, GIF, SVG, WebP, ICO, and BMP. All processing runs entirely in your browser — your images are never uploaded to any server.
What is Base64 image encoding?
Base64 image encoding converts binary image data into an ASCII text string. The result can be embedded directly in HTML, CSS, or JSON without needing a separate image file. A Base64 data URI looks like data:image/png;base64,iVBORw0KGgo... and can be used anywhere a URL is expected. This technique eliminates an HTTP request for the image.
Common use cases for image to Base64 conversion
Developers embed Base64 images in HTML emails (where external images may be blocked), inline small icons in CSS to reduce HTTP requests, include images in JSON API responses, and embed assets in single-file HTML applications. It is especially useful for small images like logos, favicons, and UI icons where the overhead of a separate request outweighs the increased file size.
Frequently Asked Questions
Does Base64 encoding increase image file size?
Yes. Base64 encoding increases the data size by approximately 33% because it represents binary data using only printable ASCII characters. This tradeoff is acceptable for small images but not recommended for large photos.
Which image formats can be converted to Base64?
All common image formats work, including PNG, JPEG, GIF, SVG, WebP, and ICO. The converter generates the correct MIME type in the data URI automatically based on the input file.