Image to Base64 Converter
Convert images to Base64 strings and Base64 strings back to images. Supports PNG, JPG, GIF, SVG, WebP, and ICO. Output as raw Base64, data URI, HTML img tag, or CSS background-image. All processing happens in your browser.
Works OfflineDark ModeNo Ads
Upload Image
Drag & drop an image here
or click to browse · PNG, JPG, GIF, SVG, WebP, ICO
How to Use
- Enter your value in the input field
- Click the Calculate/Convert button
- Copy the result to your clipboard
Frequently Asked Questions
- What is Base64 image encoding?
- Base64 image encoding converts binary image data into an ASCII text string using 64 characters (A-Z, a-z, 0-9, +, /). This allows images to be embedded directly in HTML, CSS, or JSON without separate file requests. The encoded string is approximately 33% larger than the original binary data.
- What is a data URI for images?
- A data URI (data:image/png;base64,...) embeds image data directly inline in HTML or CSS instead of referencing an external file. It includes the MIME type and Base64-encoded content. Data URIs eliminate extra HTTP requests but increase document size by ~33%. Best for small images like icons, logos, and UI elements under 10 KB.
- Which image formats can be converted to Base64?
- Any image format can be Base64 encoded, including PNG, JPEG/JPG, GIF (including animated), SVG, WebP, and ICO. The format is preserved in the data URI MIME type (e.g., data:image/png;base64,... or data:image/svg+xml;base64,...). SVG images are particularly efficient since they are already text-based.
- When should I use Base64 images vs regular image files?
- Use Base64 for small images (under 10 KB) like icons, bullets, and simple logos to reduce HTTP requests. Use regular image files for larger images, photos, and frequently reused assets that benefit from browser caching. Base64 images cannot be cached independently and increase HTML/CSS file size by 33%.
- How do I use a Base64 image in HTML or CSS?
- In HTML, use: <img src="data:image/png;base64,iVBOR..." alt="description" />. In CSS, use: background-image: url('data:image/png;base64,iVBOR...');. The data URI replaces the traditional file path. All modern browsers support data URIs for images.
- Is it safe to convert images to Base64 in the browser?
- Yes, this tool processes images entirely in your browser using the FileReader API. No image data is uploaded to any server. The conversion happens client-side using JavaScript, so your images remain private. The Base64 output is generated locally and never leaves your device.