Upload Images: Click upload area or drag image files directly
Select Format: Choose target format from dropdown menu
Adjust Quality: Use slider to adjust compression quality (JPG and WebP only)
Start Conversion: Click "Batch Convert" or convert each file individually
Download Results: Download individually or package download all conversion results

Supported Formats

Input Format	Output Format	Compression	Transparency
PNG	✅	❌	✅
JPG	✅	✅	❌
WebP	✅	✅	✅
ICO	✅	❌	✅
SVG	✅	❌	✅
GIF	✅	❌	✅
BMP	✅	❌	❌

Technical Details

This tool is implemented using pure JavaScript technologies:

Canvas API: For image rendering and format conversion
File API: Handle file upload and reading
Blob API: Generate converted file data
JSZip: Implement batch download packaging functionality

All processing is completed on the client side, ensuring your image privacy and data security.

FAQ

Q: Which browsers are supported?
A: Supports all modern browsers including Chrome, Firefox, Safari, Edge, etc.

Q: Is there a file size limit?
A: No theoretical limit, but recommend single files under 50MB for optimal performance.

Q: What are the limitations for SVG conversion?
A: SVG to bitmap conversion renders according to the SVG's viewBox dimensions.

Q: How is the conversion quality?
A: PNG format is lossless conversion, JPG and WebP allow quality adjustment, ICO automatically generates multiple sizes.

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