CyberCodeImage to Base64 Converter
Free online image to Base64 converter. Upload any image and get the Base64-encoded data URI instantly — ready to paste into CSS background-image, HTML img src or JSON payloads. Runs 100% in your browser.
Click to upload an image
PNG, JPG, WebP, GIF, SVG
What is a Base64 image (data URI)?
A data URI embeds an entire image as a Base64 text string directly inside HTML, CSS or JSON — data:image/png;base64,iVBOR… — eliminating a separate HTTP request. It is the standard trick for small icons in CSS, images in HTML emails, and inline assets in JSON payloads.
The trade-off: Base64 is ~33% larger than the binary original and cannot be cached separately. Use it for small images (a few KB); serve large images as normal files.
How to use
- 01Upload any image file (PNG, JPG, WebP, GIF or SVG).
- 02The tool instantly generates a Base64 Data URI and the raw Base64 string.
- 03Copy the Data URI to use in CSS background-image or HTML img src attributes.
- 04Copy the Base64 only string if you need it without the data: prefix.
Frequently asked questions
- When would I need an image as Base64?
- Common use cases include embedding images directly in CSS (background-image: url(data:...)), in HTML email templates, in JSON API payloads, or in SVG files — to avoid a separate HTTP request.
- Does Base64 encoding increase the file size?
- Yes. Base64 encoding increases file size by approximately 33% because it represents binary data using only printable ASCII characters (4 characters per 3 bytes).
- Is my image uploaded to your server?
- No. The Base64 encoding is done entirely in your browser using the FileReader API. Your image is never sent to any server.