Convert Images to Base64 Data URIs
Encode an image as a Base64 data URI you can paste straight into HTML, CSS, JSON or an email template. The file is read locally by your browser and never sent over the network.
Your image is processed by your own browser and never uploaded. Many online editors send your photo to their servers and delete it later — this one never receives it at all.
Why use Image to Base64
- Instant Base64 data URI with the correct MIME type prefix
- One-click copy to clipboard
- Shows the encoded size so you can judge whether to inline it
- Encodes the original file byte-for-byte — no re-compression
- Supports JPG, PNG, WebP, AVIF, GIF and BMP
- Runs locally; nothing is uploaded
Popular uses
- Inlining small icons in CSS to save HTTP requests
- Embedding images in single-file HTML reports or emails
- Storing small images inside JSON configs or API test fixtures
- Pasting images into tools that only accept text input
Image to Base64: frequently asked questions
What is a Base64 data URI?
A data URI is a text string that contains an entire file, encoded in Base64 and prefixed with its type, such as data:image/png;base64. Browsers can display it anywhere a normal image URL is accepted, which lets you embed an image directly in code instead of linking to a separate file.
How do I use a Base64 image in HTML or CSS?
In HTML, paste the string into the src attribute of an img tag. In CSS, wrap it in url() for properties like background-image. In JSON, store it as a regular string value. Because the image data lives inside your code, no separate image request is needed when the page loads.
Does Base64 make images larger?
Yes. Base64 encoding adds roughly one third to the file size, and inlined images can't be cached separately by the browser. It's best for small assets such as icons, logos and tiny UI graphics. For large photos, a normal compressed image file is usually faster and more efficient.
Which image formats can I encode?
You can encode JPG, PNG, WebP, AVIF, GIF and BMP files. The tool encodes your original file byte-for-byte without re-compressing it, so quality is unchanged and animated GIFs stay animated. To reduce the size of the string, compress or resize the image before encoding it.
Is my image uploaded to convert it to Base64?
No. Your browser reads the file from your device and encodes it locally, so the image never travels to a server. That makes the tool safe for internal screenshots, customer assets or anything you don't want stored on a third-party service.