Image to Base64
Convert an image into a Base64 data URI, HTML tag or CSS background.
Base64 is about a third larger than the original file, so it suits small icons and logos rather than photos.
Runs entirely in your browser — nothing is uploaded.
About the Image to Base64
The Freemium.Tools image to Base64 converter turns a PNG, JPG, SVG, GIF or WebP into a data URI you can paste straight into HTML, CSS, JSON or an email template.
A Base64 data URI embeds the image inside the code itself, so the browser needs no second request to fetch it. For small icons, logos and email assets that removes a round trip and any risk of a broken image path.
Paste-ready output is offered in four shapes: a raw data URI, an HTML img tag, a CSS background rule, or the Base64 payload alone for APIs and JSON fixtures.
How to use it
- 1Drop the image. Any common web image format works; conversion happens on your device.
- 2Pick the output shape. Data URI, HTML tag, CSS background, or raw Base64 for APIs.
- 3Copy it into your code. Copy to the clipboard or download the string as a text file.
Frequently asked questions
Why is the Base64 bigger than my image?
Base64 encodes three bytes as four characters, so the text is roughly 33% larger than the original file. That is why it suits small assets, not photographs.
When should I use a data URI?
For icons, logos and tiny decorative images under about 5 KB, and for HTML emails where linked images are often blocked by default.
When should I avoid it?
For large photos and anything reused across pages — a normal image file can be cached by the browser, while an embedded data URI is re-downloaded with every page.
Is my image uploaded?
No. The file is read and encoded in your browser, so unreleased artwork and client assets stay on your machine.