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Image to Base64 Converter

Convert any image to a Base64 data URI, ready-to-use HTML tag, or CSS background-image snippet — free and instant.

Runs entirely in your browser — your files are never uploaded to a server.

Last updated

This tool processes your file entirely in your browser. Nothing is uploaded to our servers.

How It Works

1. Choose Your File

Drag & drop or select the file you want to work with.

2. Processed in Your Browser

Everything happens locally on your device — your file is never uploaded anywhere.

3. Download Your Result

Get your finished file instantly, ready to save or share.

About Image to Base64 Converter

Converting an image to Base64 turns it into a block of plain text that can be embedded directly inside HTML or CSS as a “data URI,” instead of linking to a separate image file — useful for very small images where reducing separate network requests matters.

This trade-off only makes sense for small images — Base64 encoding increases file size by roughly a third compared to the original binary image, so embedding a large image this way is usually counterproductive.

Common use case: a small icon or logo that needs to display reliably even if external image loading fails or is blocked, since a Base64-embedded image is part of the HTML/CSS itself rather than a separate file that could fail to load.

Frequently Asked Questions

How to convert an image to Base64?

Drag an image onto the tool or click Choose Image. It accepts any image type your browser can open and instantly shows the Base64 output. Use the copy buttons to grab it as a data URI, a ready-made HTML img tag, or a CSS background-image rule.

How to convert an image to a Base64 string?

Upload the image and copy the Data URI box, which is the Base64 string with its data:image prefix already attached. Base64 text is roughly 33 percent larger than the original file, and the tool warns you when the image is over 2 MB, because very long strings are impractical.

How to convert an image to Base64 online?

Use this page: no signup, and the encoding is done by your browser, so the image is not uploaded to any server. That makes it suitable for private or unreleased graphics. Choose the file, then copy the output format you need.

How to convert an image to Base64 in HTML?

Upload the image and click Copy HTML Tag to get a complete img tag with the Base64 data URI in its src attribute. Paste it into your HTML. For stylesheets, copy the CSS background-image output instead. Keep images small, since Base64 grows the page size.

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