Image to Base64 Converter
Turn any image into a Base64 data URI you can paste straight into HTML, CSS or JSON — encoded locally in your browser.
Drag and drop an image here
PNG, JPG, GIF, WebP or SVG — up to 10 MB
Your image never leaves this device — encoding happens entirely in your browser.
How to Use the Image to Base64 Converter
- Drag an image onto the drop zone, or use the file picker to choose a PNG, JPG, GIF, WebP or SVG from your device.
- Check the thumbnail and the file name, type and size line to confirm you picked the right image.
- Pick "Data URI" for a string you can paste straight into src or url(), or "Raw Base64" when the payload alone is what your API expects.
- Copy the result, or use "Copy as CSS background-image" and "Copy as img tag" to grab a finished snippet.
- Press "Clear" whenever you want to encode a different image.
What Is an Image to Base64 Converter?
An image to Base64 converter reads the raw bytes of a picture and rewrites them as printable ASCII characters. Wrap that string in a data:image/... prefix and you get a data URI — a self-contained image that lives inside your HTML, CSS, JSON or email template instead of sitting on a server as a separate file.
Developers reach for Base64 images when an extra network request costs more than a few extra kilobytes: tiny icons, favicons, email signatures, single-file HTML demos, or an avatar that has to travel inside a JSON payload. The trade-off is size — Base64 adds roughly 33% to the original file — so this tool shows the encoded length and warns you as soon as the output passes 1 MB.
Going the other way? The Base64 to image decoder turns a data URI back into a downloadable picture. For plain strings, use the Base64 encoder and decoder, and shrink oversized photos first with the image compressor.
Frequently Asked Questions (FAQ)
How do I convert an image to Base64?
Drop an image onto the upload area or pick one with the file button, and the Base64 string appears immediately. Choose the data URI format to paste it into HTML or CSS, or raw Base64 if you only need the payload.
What is a Base64 data URI?
A data URI is a full image embedded in a single string, shaped like data:image/png;base64,AAA... Browsers treat it exactly like a file URL, so it works in an img src, a CSS url() or an email template with no separate download.
How do I convert a PNG to Base64 without uploading it?
This converter uses the browser's FileReader API, so the PNG is read from your own disk and encoded locally. No copy of the file is ever sent to ToolGenie or any other server.
Does converting an image to Base64 make it bigger?
Yes. Base64 represents every three bytes with four characters, so the encoded string is about 33% larger than the original file. That is fine for small icons but wasteful for photographs.
How do I use a Base64 image in CSS?
Use the "Copy as CSS background-image" button and paste the result into any rule, for example .logo { background-image: url("data:image/png;base64,...") }. The image renders with no extra HTTP request.
Which image formats can I encode — JPG, GIF, WebP or SVG?
Any format your browser recognises as an image works, including PNG, JPG, GIF, WebP, SVG, BMP and ICO. The MIME type of the file you choose is written into the data URI automatically.
Is there a file size limit?
Files up to 10 MB are accepted. Larger images are rejected because the resulting Base64 string would be unwieldy to paste and would noticeably slow down any page that embeds it.
Tips for Converting Images to Base64
- Tip 1: Keep inline Base64 for assets under about 10 KB — icons, spinners and logos. Anything larger is usually faster as a cached file the browser can reuse across pages.
- Tip 2: SVG encodes especially well. Because it is already text, an inlined SVG logo stays sharp at any resolution and avoids a second request entirely.
- Tip 3: Use raw Base64 when an API field expects only the payload, and the data URI when a browser has to render it. Sending a full data URI where a raw string is expected is a common cause of failed uploads.
- Tip 4: Compress before you encode: run the file through the image compressor to cut the payload, then check your work by pasting the result into the Base64 to image converter.