Image to Base64
Last updated: June 16, 2026Encode an image as a data URI.
Image to Base64 is a free online tool to encode an image as a data URI. It runs entirely in your browser, so your files never leave your device — nothing is uploaded. There's no sign-up, no watermark, and it works on any modern browser on desktop or mobile.
How to use Image to Base64
Image to Base64 converts any image into a Base64 data URI you can paste straight into CSS (background-image) or HTML (img src), removing an extra network request. The image is encoded in your browser — nothing is uploaded. Free, no sign-up.
Read the full guide: Image to Base64: Encode an Image Online (Free)
- 1Drop in an image.
- 2Copy the generated Base64 data URI.
- 3Paste it into your CSS or HTML.
CSS/HTML ready
Get a complete data: URI you can embed directly.
Private
Encoding happens on your device — nothing is uploaded.
Any format
PNG, JPG, WebP, SVG and GIF all supported.
Inline a CSS background image
Drop a small icon or texture in and copy the data URI straight into a background-image rule. Inlining the asset removes one HTTP request, so the graphic paints with the stylesheet instead of waiting for a separate download. Best reserved for tiny, rarely-changing images, since Base64 adds roughly 33% to the file size and cannot be cached on its own.
Embed a logo in an HTML email
Many email clients block or strip externally hosted images, leaving broken placeholders. Encode your logo or signature graphic here and paste the data URI into the img src so the picture travels inside the message itself. The image renders without a remote fetch, sidestepping image-blocking warnings, though file size grows about a third, so keep embedded graphics small.
Hardcode an image into a script or config
When you need an asset available with zero file dependencies, encode it into a data URI and drop the string straight into a Python script, JSON config, JavaScript constant, or notebook cell. The image ships inside your source, so there is no path to resolve or file to bundle alongside it. Encoding runs locally in your browser, keeping unreleased artwork off any server.
Image to Base64 — frequently asked questions
Why embed an image as Base64?
It inlines the image into your CSS/HTML, saving an HTTP request — handy for small icons. Large images are better left as separate files.
Is my image uploaded?
No — it's read and encoded entirely in your browser.
Is it free?
Yes, completely free.
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