What is File to Base64 Converter Online?
File-to-Base64 conversion embeds binary files (images, PDFs, fonts) in HTML, CSS, JSON, and APIs as data URIs, avoiding separate HTTP requests. Uses the FileReader API locally — your data never leaves your device.
How to Use File to Base64 Converter Online
- Drop a file onto the zone or click to browse.
- Base64-encoded string appears instantly.
- Copy the data URI or raw Base64.
Frequently Asked Questions
What is a data URI?
A data URI embeds file content as a URL: data:[mime];base64,[encoded]. Use as src for img tags or CSS background-image.
Is there a file size limit?
No server limit — processing is client-side. Files over 10 MB may be slow due to browser memory.