Base64 Image Converter
Last updated: 2026 · Free online tool
What is Base64 Image Converter?
Free online tool to encode image files (PNG, JPG, GIF, SVG) into Base64 data URI strings or decode Base64 back into viewable images, with instant preview, copy and download in your browser.
How to Use
- 1 Select mode — Choose the Image→Base64 or Base64→Image tab.
- 2 Input — Upload an image file or paste a Base64 string.
- 3 Check results — View the preview, file information, and Base64 output.
- 4 Copy/Download — Copy as Base64, Data URI, HTML, or CSS, or download the image.
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Frequently Asked Questions
PNG, JPEG, GIF, WebP, and SVG are supported.
Up to 5MB is supported. Try compressing larger files first.
Data URI includes the MIME type ('data:image/png;base64,...'), while Base64 is the pure encoded string.
Yes, use the Data URI directly in <img src> or use the HTML/CSS copy buttons.
No. All conversions are processed using the browser's FileReader API.