Image to Base64
Convert an image into a Base64 data URL for inline embedding.
Drop an image to encode
The file is read locally and never uploaded
About Image to Base64
A data URL embeds a file directly in your markup or stylesheet, removing a round trip to the server. For small, always-needed images that can measurably improve first render.
This tool reads your file locally and produces the complete data URL along with copy-ready HTML, CSS and Markdown snippets.
How Image to Base64 works in your browser
The file is read locally and encoded as a data URL: the MIME type followed by the Base64 representation of its bytes. Base64 uses four characters for every three bytes, so the output is roughly a third larger than the file.
Alongside the raw data URL, the tool gives ready-made snippets for an img tag, a CSS background and Markdown.
When to use it
- Inlining a small icon in CSS to save a network request.
- Embedding an image in a single-file HTML document or email template.
- Putting an image into a JSON payload for an API test.
Frequently asked questions
When should I inline an image?
For very small assets - icons, spacers, tiny logos - inlining saves a network request. Above a few kilobytes it usually hurts more than it helps.
Why is the output larger than the file?
Base64 encoding adds about a third to the byte count because it represents three bytes with four characters.
Can I use this in CSS?
Yes. The tool gives you ready-made snippets for an img tag, a CSS background and a bare data URL.