Convert any image into a base64 text string you can embed directly in HTML or CSS, or paste a base64 string back in to render and download it as an image. Everything happens locally in your browser.
How This Image to Base64 Converter Works
Switch to the “Image to Base64” tab, then click the upload area to choose an image or drag and drop one in. The tool instantly converts it into a base64 encoded string, which you can copy and paste directly into an HTML “img” tag’s “src” attribute or a CSS “background-image” property. To go the other way, switch to the “Base64 to Image” tab, paste a base64 string, and click “Render Image” to preview and download it.
What Is Base64 Encoding
Base64 is a way of representing binary data, such as an image, as plain text using only letters, numbers, and a few symbols. This makes it possible to embed an image directly inside HTML, CSS, or JSON without linking to a separate file, which is useful for small icons, inline email images, or avoiding extra network requests.
Who This Tool Is For
Developers embedding small images directly into HTML or CSS, anyone building emails that need inline images, and people who received a base64 string and want to see or save the actual image it represents.
Frequently Asked Questions
Is this converter free to use?
Yes, completely free with no limit on how many images you can convert, and no account is required.
Does this tool upload my images to a server?
No. The conversion happens entirely in your browser using JavaScript’s built in file reading tools. Your image is never uploaded or sent anywhere.
Does base64 encoding make the image file smaller?
No, it actually makes the data slightly larger, typically by about a third. Base64 is used for convenience of embedding, not for reducing file size.
What image formats are supported?
Any image format your browser can display, including PNG, JPEG, GIF, WEBP, and SVG, can be converted to base64 and back.