圖片格式轉換器

在 JPG、PNG、WebP、BMP 格式間轉換圖片，支援品質控制。

image format converterconvert jpg to pngpng to webpjpg to webpimage converter online

Drag & drop a file here, or click to browse

Supports image files: JPG, PNG, GIF, WebP, BMP, SVG, TIFF

Performance

Web Worker Enabled

Using Web Worker for better performance (prevents UI freezing with large images)

⚠️ Web Worker is not available in this browser. Falling back to main thread.

Options

Target Format

Input

Output

Privacy: This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.

Examples

Frequently Asked Questions

Q: Which formats are supported?

A: Input: JPG, PNG, WebP, GIF, BMP, TIFF, SVG. Output: PNG, JPEG, WebP, BMP.

Q: Will transparency be preserved?

A: Yes for PNG and WebP output. JPEG and BMP do not support transparency (white background is used).

Q: Is there a file size limit?

A: No hard limit, but very large images (over 50MB) may be slow due to browser memory.

Related Tools

圖像壓縮器

壓縮圖像以減小文件大小，同時保持質量。支援JPG、PNG、WebP格式。

圖像大小調整器

將圖像調整為精確尺寸或按百分比縮放。包含Web和列印的常用預設。

浮水印添加器

添加文字或Logo浮水印到圖像，可自訂位置、透明度和大小。支援批次處理。

Privacy & Security

This tool runs entirely in your browser. No data is sent to our servers. We don't store, share, or have access to any of the information you process here.