Home › Image Tools › Image to Base64 Converter
Convert any image to Base64 encoding and get the output as a raw string, CSS data URL, HTML img tag, or JSON — instantly in your browser, no upload needed.
Upload your image
Drag and drop any image — JPG, PNG, WebP, GIF, SVG, BMP, ICO, or AVIF — into the tool, or click to browse. Files up to 10 MB are supported.
Choose your output format
Select from five formats: the raw Base64 string, a complete data URL, an HTML `` tag, a CSS `background-image` declaration, or a JSON object. Switch between them instantly.
Copy or download
Click Copy to put the output on your clipboard, or download it as a .txt file. The original file size, Base64 size, size increase percentage, and image dimensions are all shown for reference.
Base64 is used to embed binary data (like images) directly into text-based formats like HTML, CSS, JSON, or SVG. It’s commonly used to inline small images into web pages, emails, or API payloads to avoid separate HTTP requests.
Base64 encoding expands binary data by approximately 33% because it represents every 3 bytes of binary as 4 ASCII characters. This is the expected tradeoff for embedding images as text.
No. The FileReader API converts your image to Base64 entirely in your browser. Nothing is sent to any server at any point.
JPG, PNG, WebP, GIF, SVG, BMP, ICO, AVIF, and any other format your browser can read. SVGs are supported as-is and result in a much smaller Base64 string than raster formats.
Base64 Encoder/Decoder
Encode or decode any text as Base64
SVG to PNG
Convert SVG files to PNG images
Image Compressor
Reduce image file size before encoding
PNG to WebP
Convert PNG files back to WebP.
Embedding images as Base64 is a common technique in web development for reducing HTTP requests, embedding assets in CSS or HTML emails, or passing images through JSON APIs. This free online converter handles the encoding instantly in your browser and gives you the exact format you need — whether that’s a raw Base64 string for a database field, a complete data URL for a CSS rule, or an HTML img tag ready to paste into your markup.
- Five output formats — Raw Base64, data URL, HTML img tag, CSS background, or JSON.
- All major image formats — JPG, PNG, WebP, GIF, SVG, BMP, ICO, AVIF.
- Size stats shown — See original size, Base64 size, and inflation percentage at a glance.
- One-click copy — Copy any format directly to clipboard.
- Zero upload — FileReader API processes your image locally with no server involvement.
Your image is never uploaded. The entire Base64 conversion happens in your browser using the native FileReader API — no libraries, no CDN, no network requests. Your image data stays completely private on your device.