Free browser tool
Image to Base64 Converter Online Free
Select an image and generate raw Base64, a complete data URI, CSS background-image code and an HTML img snippet locally in your browser.
FREE image developer tool
Image to Base64
Convert image files to Base64 and copy ready-to-use snippets without uploading the image.
How to use this free tool
- 1
Choose a JPG, PNG, WEBP, GIF or SVG image.
- 2
Review the format, byte size and Base64 length.
- 3
Copy the raw Base64, data URI, CSS or HTML snippet.
Good uses
- Embed a tiny icon in CSS for a quick prototype.
- Create a data URI for an email or HTML test.
- Inspect the size impact of Base64 image embedding.
Limitations
- Base64 usually increases data size by about one third before compression.
- Large files can slow down the browser, so this tool has a size guard.
- Generated snippets can become very long and may not be ideal for production HTML.
Are files uploaded to Cobalt Tools?
No. This tool runs in your browser. Selected files and generated output are not uploaded or stored by Cobalt Tools.
Is this tool free?
Yes. This Cobalt Tools browser utility is free to use.
Does Base64 make images smaller?
No. Base64 usually makes the encoded text longer than the original binary file. It is useful for embedding, not compression.
Can I convert SVG files?
Yes. SVG files are read locally and encoded as image/svg+xml data URIs when the browser can read the file safely.
Is the Base64 output sent to analytics?
No. Cobalt Tools does not send file names, image contents or generated Base64 output to analytics.