Image to Base64 Converter – Free Online Tool
Convert images to Base64 data URLs or decode Base64 images privately in your browser.
Convert an Image to a Base64 Data URL
Choose a PNG, JPG, WebP, GIF, BMP, or SVG file and the browser converts its bytes into a complete data:image/...;base64 URL. Copy the result for a small HTML, CSS, JSON, or development asset.
Decode Base64 Back Into an Image
Paste a supported image data URL to preview it and download the decoded image. The decoder accepts image MIME types only and rejects incomplete or non-image data URLs.
Know When Base64 Images Are a Good Fit
Base64 increases the original byte count by roughly one third and prevents normal image caching as a separate file. It is most useful for small icons, test fixtures, self-contained examples, and email or API payloads—not large photos.
Copy a Data URL for HTML and CSS
Use the complete data URL directly in an img src value or CSS url() value. Keep the MIME type and base64 marker intact, and quote long CSS URLs to avoid parsing mistakes.
Private Local Image Encoding
FileReader performs encoding in your browser. Images, filenames, Base64 output, pasted data URLs, and decoded files are not uploaded. Optional analytics records only consent-gated completion or download events.
Frequently Asked Questions
Everything you need to know about the Image to Base64 Converter.
How do I convert an image to Base64?
Choose an image and copy the generated data URL. It includes the image MIME type, the base64 marker, and the encoded data.
Does Base64 reduce image file size?
No. Base64 usually adds about 33 percent before compression, so it is best for small assets rather than large photographs.
Can I convert Base64 back to an image?
Yes. Paste a complete supported image data URL, preview it, and download the decoded file.
Are my images or Base64 text uploaded?
No. Encoding, validation, preview, and decoding happen locally in your browser.