Image to Base64 Converter — Encode PNG/JPG to Base64 Online Free

Upload a PNG, JPG, GIF, or WebP and get the data URI, raw base64, ready HTML img tag, and CSS background snippet — all in your browser.

Image to Base64 Converter — Encode PNG/JPG to Base64 Online Free
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Image to Base64 Converter — Embed Images Directly in Your Code

Turn any PNG, JPG, GIF or WebP into a Base64 data URI, raw string, ready-made HTML img tag or CSS background snippet — instantly, right in your browser. Perfect for small icons, email templates and CSS sprites.

🖼️

Drag and drop your image here

or click to browse your files — PNG, JPG, GIF or WebP

Uploaded image preview

Data URIPaste straight into HTML, CSS or JavaScript wherever a URL is expected

Raw Base64 stringJust the encoded characters, no prefix — for APIs and storage

HTML img tagA complete, ready-to-paste image element

CSS background snippetDrop-in background-image rule for your stylesheet

100% private

Your image is encoded locally in your browser with FileReader. Nothing is ever uploaded to a server.

No signup

Use every feature instantly. No account, no email address, no paywall.

Free forever

Unlimited image conversions, free today and free always.

How to use the image to Base64 converter

  1. 1Add your image

    Drag and drop a PNG, JPG, GIF or WebP onto the upload box, or click it to browse your files.

  2. 2Watch it encode

    The tool converts your image to Base64 instantly and shows you the original size versus the encoded size.

  3. 3Pick your format

    Grab the full data URI, the raw Base64 string, a ready-made HTML img tag, or a CSS background-image snippet.

  4. 4Copy and paste

    Hit Copy on any box and drop the code straight into your HTML, CSS or JavaScript — no editing needed.

Why developers use this converter

Four output formats in one shot

Get the data URI, raw string, HTML tag and CSS snippet from a single upload — no re-encoding, no reformatting.

True drag and drop

Drop an image from your desktop straight onto the page. Keyboard accessible too: tab to the box and press Enter.

Honest size comparison

See exactly how much bigger the Base64 version is (roughly 33%), so you can decide if embedding is worth it.

One-click copy buttons

Each output box has its own Copy button with visual confirmation — no fiddly text selection.

Works fully offline

Everything runs with client-side JavaScript. Once the page loads, you can even disconnect and keep converting.

Four image formats

Handles PNG, JPG, GIF and WebP — including transparency in PNG and WebP files.

Frequently asked questions

What is Base64 encoding for images?
Base64 turns the binary data of an image into a long string of plain ASCII text characters. That text can live inside HTML, CSS or JavaScript as a data URI (data:image/png;base64,…), so the image travels with your code instead of needing a separate file request.
Why is the Base64 output about 33% bigger than the image?
Base64 packs every 3 bytes of image data into 4 text characters. That 4-over-3 ratio is where the roughly 33% size increase comes from — it is a fixed cost of the encoding, not something this tool adds. The size note under your preview shows the exact difference.
Should I use the data URI or the raw Base64 string?
Use the data URI when something expects a URL — an img src, a CSS background-image, or a link href. Use the raw string when an API, database or JSON payload wants just the encoded characters without the data:image/… prefix.
Are my images uploaded to a server?
No. Your file is read with the browser’s built-in FileReader and encoded with local JavaScript. The image never leaves your device, which is why the tool also works offline after the page loads.
Which image formats are supported?
PNG, JPG (JPEG), GIF and WebP. Transparency in PNG and WebP images is preserved in the encoded output.
When is embedding Base64 images a good idea — and when is it not?
Base64 is great for tiny assets: icons, small logos, email template graphics and CSS sprites, where avoiding extra HTTP requests matters. It is a poor choice for large photos, because the 33% bloat adds up and encoded images cannot be cached separately. A practical rule of thumb: keep embedded images under roughly 10 to 20 KB.
How is this different from the Base64 Encoder/Decoder tool?
The Base64 Encoder/Decoder works on text you type or paste — strings, tokens and code. This converter is built for image files: it reads the actual file bytes and hands you ready-to-paste HTML and CSS snippets, plus a size comparison the text tool does not provide.

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