Image to Base64 Converter
Convert PNG, JPG, GIF, WEBP, SVG, BMP or ICO images to Base64 — entirely in your browser
Click to browse or drag & drop an image
PNG, JPG, GIF, WEBP, SVG, BMP, ICO
Your image is encoded entirely in your browser — no data is ever sent to any server.
Encoding Result
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Frequently Asked Questions
Is my image uploaded to a server?
No. The conversion uses the browser’s FileReader API entirely client-side — your image never leaves your device.
Why is the Base64 string bigger than the original file?
Base64 encoding represents every 3 bytes of binary data as 4 ASCII characters, so the encoded output is roughly 33% larger than the original file.
What’s the difference between the output formats?
Data URL includes the “data:image/…;base64,” prefix ready to drop into an <img src> or CSS. Base64 gives just the raw encoded string (useful for APIs). CSS Background wraps it in a background-image rule. HTML <img> gives a ready-to-paste tag.
Is there a file size limit?
There’s no hard limit enforced by the tool, but very large images (tens of MB) may be slow to encode and produce a very large Base64 string — best suited for small icons, logos, and thumbnails.