Image to Base64

No. The entire conversion happens client-side using the FileReader API. Your images never leave your computer. No data is ever uploaded to any server.

All standard image formats work: PNG, JPEG, GIF, SVG, WebP, BMP, and ICO. The output is a standard data URI that can be used in HTML src attributes, CSS backgrounds, or anywhere data URIs are accepted.

A data URI embeds file data directly in HTML or CSS using the format data:[MIME type];base64,[encoded data]. This avoids a separate HTTP request, which can improve page load for small images like icons. However, Base64 encoding increases file size by ~33%.

Use Base64 for small, frequently used images (icons, logos under 1KB) where the HTTP request overhead outweighs the size increase. Use external files for larger images, photos, and images needed on multiple pages — they benefit from browser caching and don't bloat your HTML.

No. The entire conversion happens locally in your browser using the FileReader API. Your image never leaves your computer. You can verify this by disconnecting from the internet — the tool continues to work.

Any image format that your browser can read is supported, including JPEG, PNG, GIF, WebP, SVG, BMP, and TIFF. The output is a Base64-encoded string of the original file's binary data with the appropriate MIME type.

Since everything runs in your browser, the limit is your system memory. For practical use, images up to 10-20MB convert fine. Note that Base64 encoding increases file size by approximately 33%.