Which image formats can I convert between?

Common web formats including PNG, JPG, WebP, GIF, BMP and AVIF, in both directions.

Are my images uploaded?

No. Conversion runs entirely in your browser, so your pictures never touch a server.

Converting to a lossless format like PNG keeps full quality; JPG and AVIF use compression you can tune.

Yes, add multiple files and each one is converted to your chosen output format.

A few browsers cannot encode AVIF; when that happens the tool falls back to PNG and tells you.

Transparency is kept for formats that support it (PNG, WebP, AVIF) and flattened for JPG, which has no alpha channel.

在线将 PNG 文件转为 BMP。免费、浏览器内完成、无需上传。

文件

将文件拖放到此处 点击或拖放添加文件。可用箭头调整顺序。

Output

Quality 85%

Max width (px) Strip metadata

使用方法

Format info

将 PNG 转为 BMP 会去除压缩并保存原始像素，文件体积会显著增大。适用于旧软件或遗留流程要求未压缩位图的场景。Frespy 在浏览器中重新编码，图片不上传。

PNG: PNG 是常见的文件格式。使用 Frespy 可在浏览器中免费转换相关格式。

BMP: BMP 是常见的文件格式。使用 Frespy 可在浏览器中免费转换相关格式。