How to use this image tool
Generate Base64 text and a data URI from a selected image in your browser.
How the browser processing works
- Reads the selected image with FileReader.
- Creates a data URI that includes the MIME type and Base64 payload.
- Lets you copy either the raw Base64 or full data URI.
Formula
Data URI = data:{file type};base64,{Base64 payload}.
Example
Use a small Base64 image in a quick HTML prototype or CSS background test.
Using your output
Use the Base64 or data URI output for small embedded images in prototypes, HTML, CSS, JSON, or email templates.
Assumptions and limitations
- Base64 usually increases data size compared with the original binary file.
- Do not use Base64 for large images unless you have a specific reason.
Frequently asked questions
Does Base64 make files smaller?
Usually no. Base64 text is often larger than the original binary file.
When should I use a data URI?
Use it for small embedded assets in prototypes or templates, not for large production images.