All Converter Pro
在线转换 PDF 转 PNG
在线免费将 PDF 页面转换为无损 PNG 图片。最适合包含文字、图表或示意图且需要清晰边缘的页面。无需注册,无水印。
关于此 PDF 转 PNG 工具
PDF to PNG renders a chosen page of your document as a lossless image at 180 DPI. PNG is the right choice whenever the page contains text, tables, charts, diagrams or line art: its lossless compression keeps edges perfectly crisp, while JPG can introduce faint halos and blur around sharp black-on-white text. Use it to lift a diagram out of a report for a presentation, to publish a page as an image on a website, or to prepare a page for further editing in a graphics tool. The trade-off is file size - PNG files are larger than the equivalent JPG, which is the normal cost of keeping every pixel intact.
如何使用 PDF 转 PNG
- 打开工具并添加您的文件、文字或数值。
- 检查可用选项,例如页面范围、输出格式、质量、密码或语言。
- 开始处理,并在完成前保持浏览器窗口打开。
- 下载结果,如有需要可继续使用相关工具。
实用提示
- 对于扫描的 PDF,支持 OCR 的工具会尽可能自动运行文字识别。
- 对于大文件,在通过邮件分享或上传到门户网站之前,请使用压缩工具。
- 为获得最佳效果,请上传扩展名正确的干净文件,避免使用损坏的文档。
常见问题
Why choose PNG instead of JPG for a PDF page?
PNG is lossless, so text, tables and line art stay perfectly sharp. JPG compression can add faint blur or halos around crisp black-on-white text, which is exactly what most document pages contain.
Which page is exported?
The page number you enter, defaulting to page 1. Run it again with another number for additional pages.
What resolution do I get?
180 DPI - about 1240×1750 pixels for an A4 page, sharp on screen and suitable for slides and print.
Will the PNG have a transparent background?
No. PDF pages are rendered with their white page background, so the image is opaque. To remove a background afterwards, use the Background Remover.
Why is the PNG bigger than a JPG of the same page?
PNG keeps every pixel exactly, while JPG discards fine detail to save space. That is the trade-off for the sharper result.
免费吗?
是的,免费,无需注册,无水印。