Img→Base64: Formats, File Types, and Size Limits

A practical reference for image to base64: supported input formats, size limits, and how to get the best output. Every file stays on your device.

Published August 28, 20264 min read

Formats, file types, and size limits for Img→Base64

Knowing what Image to Base64 accepts makes your workflow smoother.

The tool works with *.

Format	MIME type	Status
*	`image/*`	Supported

Image to Base64 processes up to 20 MB. Because everything runs in your browser, the practical limit is your device's memory — not a crowded server.

Use the newest formats you can for the best quality-to-size balance
When quality matters, choose lossless options; when sharing, choose compact ones
Keep a backup of your original input before processing

Image to Base64 handles * and up to 20 MB with no file ever leaving your device.

Image to Base64 works with *.

Image to Base64 handles up to 20 MB because processing happens locally in your browser.

Yes — process as many as you need. There are no daily or monthly caps.