🖼️ Source Image File
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Select or drag image here
Supports JPG, PNG, WebP, GIF, SVG, ICO • 100% Local
📋 Base64 String Output
Convert JPG, PNG, WebP, GIF, SVG, and ICO image files into clean Base64 Data URIs with our free Online Image to Base64 Converter. Embed graphic assets directly into HTML templates, CSS stylesheets, JavaScript code, or JSON payloads without managing separate file links. Features output code generation for HTML <img> tags, CSS background-image syntax, JS constants, JSON payloads, raw DataURIs, downloadable .txt text exports, and string byte length metrics. Processing runs 100% locally in browser memory.
Drag and drop your graphic file (JPG, PNG, WebP, GIF, SVG) into the drop zone or browse files.
Choose between Full Data URI, HTML <img> tag, CSS background syntax, JS variable, or JSON payload.
Click Copy String or Download .txt to export the generated data stream directly to your clipboard or file system.
Generate raw DataURIs, HTML <img src="..."> tags, CSS background-image: url(...) rules, JS variables, or JSON payloads.
Encodes JPG, PNG, WebP, GIF, SVG vector, ICO favicon, and HEIC graphic files into compliant data streams.
All FileReader encoding runs entirely inside your browser's local RAM. Your images are never sent over external networks.
Base64 binary-to-text encoding represents binary data in an ASCII string format. The encoding algorithm groups 24 bits of binary pixel data (3 bytes) into four 6-bit units. Each 6-bit integer ($0\text{ to }63$) maps directly to a index in the 64-character alphabet containing uppercase letters (A–Z), lowercase letters (a–z), digits (0–9), plus symbols (+, /), and padding (=).
Compliant with RFC 2397 Data URI Scheme, encoded image strings prepend a MIME media header, such as data:image/png;base64, or data:image/jpeg;base64,. This prefix signals to web browsers and rendering engines that the payload is an inline binary graphic stream ready for immediate DOM rendering.
Using Base64 encoding increases file payload string length by approximately $33\%$ due to the $3\text{ byte } \to 4\text{ character}$ conversion overhead. However, for small icons, SVGs, or email banners, the total elimination of HTTP round-trip latency offsets the slight payload growth.