Image to Base64 Converter
Convert images to Base64 encoded strings. Supports PNG, JPEG, GIF, SVG, WebP, BMP, and ICO formats.
Upload Image
Drag and drop an image here, or
Maximum file size: 5 MB. Supported: PNG, JPEG, GIF, SVG, WebP, BMP, ICO
Ready to Convert
Upload an image above to generate its Base64 encoded string.
About Image to Base64
- Data URI: Full data URI string ready to use in HTML src attributes or CSS url() functions.
- Raw Base64: Plain Base64 encoded string without the data URI prefix.
- CSS background-image: Ready-to-use CSS property for inline background images.
- HTML img tag: Complete HTML img element with the Base64 data embedded.
- Privacy: All conversion happens locally in your browser. Your images are never uploaded to any server.
What Is Image to Base64 Encoding?
Base64 encoding converts binary image data into a string of ASCII characters. The result is a compact text representation of your image that can be embedded directly inside HTML, CSS, JSON, or any other text-based format—no separate image file required.
This is particularly useful for small icons, logos, and inline images in single-page applications, email templates, and API responses. Instead of a separate HTTP request to load an image, the browser renders it directly from the embedded string.
Common Use Cases
- HTML embedding: Use a Base64 data URI as the src attribute of an img tag to avoid a network request for small images.
- CSS backgrounds: Inline small SVG icons or patterns as background-image: url('data:image/svg+xml;base64,...') so CSS files are self-contained.
- API payloads: Transfer images inside JSON responses or requests when binary file uploads are not practical.
- Email templates: Embed images directly in HTML email to avoid broken images when external URLs are blocked by email clients.
- Single-file bundles: Package all assets—HTML, CSS, and images—into a single portable file.
How to Use This Tool
- Upload your image: Drag and drop an image file onto the upload area, or click to browse. Supports PNG, JPG, GIF, SVG, WebP, BMP, and ICO.
- Choose your format: Select whether you want the raw Base64 string or the full data URI (includes the MIME type prefix needed for HTML/CSS).
- Copy the output: Click "Copy" to copy the result to your clipboard, then paste it into your HTML, CSS, or JSON wherever needed.
Features
Privacy First
Your image never leaves your browser. All conversion happens locally using JavaScript—nothing is uploaded to any server.
Multiple Formats
Output the raw Base64 string or the complete data URI with MIME type prefix, ready to paste into HTML or CSS.
Wide Format Support
Converts PNG, JPG, GIF, SVG, WebP, BMP, and ICO files. The MIME type is automatically detected from the file.
Instant Preview
See a preview of your uploaded image alongside the encoded output before copying, to verify you selected the right file.
Frequently Asked Questions
What image formats does this tool support?
PNG, JPG/JPEG, GIF, SVG, WebP, BMP, and ICO. The MIME type prefix in the data URI is set automatically based on the file type you upload.
Is my image data sent to a server?
No. All processing happens in your browser using the FileReader API. Your image bytes never leave your device, making this tool safe for sensitive or proprietary images.
How do I use a Base64 image in HTML?
Copy the full data URI output and paste it as the src attribute of an img tag: <img src="data:image/png;base64,...">.
What is the maximum image size I can convert?
There is no hard limit enforced by the tool, but we recommend keeping files under 1MB. Larger files produce very long strings that can slow down page rendering when embedded inline.
What is the difference between Base64 and image compression?
Base64 is a text encoding—it does not compress data. It actually increases the byte size by about 33% compared to the raw binary file. Image compression (like JPEG or WebP) reduces file size by discarding visual data. These are separate operations; you can compress an image first, then Base64-encode it.