Image to Base64 — Free Online Tool
Drop any image (PNG, JPEG, WebP, GIF, SVG) and instantly get its Base64-encoded data URI. Copy the full data: URI for use directly in HTML img src or CSS background-image, or copy just the raw Base64 string for API payloads. Shows original vs. Base64 size comparison.
100% client-side. No uploads. Your data never leaves your browser.
How to use Image to Base64
- Drop an image file into the upload area.
- The data URI and Base64 string appear instantly.
- Choose the 'Data URI' or 'Base64 only' tab.
- Click Copy to copy the output for use in your code.
Frequently Asked Questions
What is a data URI?
A data URI embeds file content directly in a URL using Base64 encoding. Format: data:image/png;base64,<encoded-data>. Browsers can load images from data URIs without making HTTP requests.
Why is the Base64 output larger than the original?
Base64 encoding uses 4 characters for every 3 bytes of data, resulting in a ~33% size increase.
Can I paste a data URI back to get the image?
This tool only encodes images to Base64. To decode, paste the data URI into a browser address bar to preview the image.
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