About Image to Base64 Converter

Converts any image to a Base64 data URL entirely in your browser — no upload, no server. Drop a PNG, JPEG, WebP, SVG, or GIF and instantly get the full data URL ready to paste into an HTML src attribute, CSS background-image property, or API JSON payload. Four ready-to-use code snippets are generated automatically so you can copy and paste without manual formatting.

• Uses the browser FileReader API — your image never leaves your device
• Outputs the full data URL (data:image/png;base64,...) and the raw Base64 string separately
• Generates ready-to-use CSS and HTML snippets for quick embedding
• Shows original file size, Base64 string length, and encoded size so you know the overhead
• Supports PNG, JPEG, WebP, SVG, and GIF input formats

Frequently Asked Questions

What is a Base64 data URL?

A data URL encodes binary file content as a text string using Base64 encoding. It starts with data:<mime-type>;base64, followed by the encoded bytes. Browsers can read this string directly as an image source, so no separate HTTP request is needed.

When should I embed images as Base64?

Base64 is useful for small icons, inline SVGs, or CSS backgrounds where you want to eliminate an extra HTTP request. For large images it is inefficient — Base64 encoding inflates file size by about 33%, and the string cannot be cached separately by the browser.

Does my image get uploaded to a server?

No. The FileReader API converts the image entirely in your browser. Nothing is transmitted over the network.

Why is the encoded size larger than the original?

Base64 represents every 3 bytes of binary data as 4 ASCII characters, which adds roughly 33% overhead. This is a property of Base64 encoding itself, not a bug.