Image to Base64
Convert an image into a Base64 data URI without uploading it anywhere. Drop a PNG, JPG, SVG, GIF or WebP file and instantly get a copyable data URI, CSS background snippet, or <img> tag — all processed locally in your browser.
Choose an image, drag & drop, or paste from clipboard
PNG, JPG, SVG, GIF, WebP — nothing is uploaded
About the Image to Base64
A Base64 data URI embeds an image directly inside HTML or CSS as text, so the browser does not make a separate network request to load it. That is handy for small icons, email templates and self-contained files — though large images inflate the markup and are better left as real files.
Because the conversion happens in your browser with the FileReader API, the image you encode is never uploaded to a server. You get the raw data URI plus ready-to-paste CSS and HTML snippets.
How to use it
- 1Drop an image onto the box or choose a file.
- 2Preview it and read the encoded size.
- 3Copy the data URI, CSS, or <img> snippet you need.
Features
- Drag-and-drop or pick a file
- Outputs data URI, CSS background, and <img> tag
- Supports PNG, JPG, SVG, GIF and WebP
- Shows file size and encoded length
- Files never leave your browser
Frequently asked questions
What is a Base64 image / data URI?
It is an image encoded as a Base64 text string with a data: prefix, which can be embedded directly in HTML or CSS instead of linking to a separate file.
When should I use a data URI?
For small images like icons or where you want a single self-contained file (e.g. an email). Avoid it for large images, since Base64 is ~33% larger than the binary and is not cached separately.
Is my image uploaded?
No. The image is read and encoded entirely in your browser using the FileReader API — it never leaves your device.
Which formats are supported?
Any image your browser can read, including PNG, JPG/JPEG, SVG, GIF and WebP.