PDF 转 PNG
免费·无需注册·文件永不离开你的设备
How to convert a PDF to PNG in 3 steps
Export pages as lossless images — the format of choice when every pixel and every letter must stay exact.
Upload the PDF
Drop your document in the box above. Rendering happens on your device.
Set resolution and range
Pick 72, 150, or 300 DPI and choose all pages or a specific range.
Download the PNGs
Click Convert. Lossless page images arrive in a single ZIP.
Why convert PDF to PNG with AmiPDF
For work that can't tolerate compression artifacts.
隐私优先
处理完全在你的浏览器内完成。不上传、不存储、不外传——绝不。
无需注册，无水印
无账号、无邮箱、无限制。输出文件与输入完全一致。
Truly lossless output
PNG's lossless encoding keeps fine lines, small text, and flat-color graphics pixel-exact — ideal for CAD, charts, and diagrams.
任何设备可用
Windows、Mac、Linux、Android、iOS 上体验一致——无需安装。
When to convert PDF to PNG
Technical drawings, UI mockups, charts destined for further editing, archival scans — anywhere JPG's compression would soften edges or muddy flat colors.
Files render locally; sensitive documents never leave your machine.
Convert PDF to PNG on any platform
AmiPDF 在你的浏览器中运行——无需安装、无需配置、无需更新。
Windows
Chrome, Edge, Firefox
macOS
Safari, Chrome
Linux
Any modern browser
iOS
Safari on iPhone, iPad
Android
Chrome, Samsung Internet
Frequently asked questions
PNG or JPG — which should I pick?
PNG for lossless quality (text, diagrams, line art) at larger file sizes; JPG for photos and everyday sharing at smaller sizes. Same DPI options either way.
Why are PNG files bigger than JPG?
PNG stores every pixel without lossy compression. That's the point — exactness costs bytes.
Can I convert a page range only?
Yes. Type a range like 2,5-9 and only those pages are exported.
What DPI do I need for printing?
300 DPI matches professional print quality; 150 DPI is fine for home printers and drafts.
Do transparent PDF areas become transparent PNG?
Pages export with a white background — PDFs are print-oriented documents, so there's typically nothing transparent behind them.
Is my file uploaded during conversion?
No. Rendering and PNG encoding both run locally in your browser.
相关 PDF 工具
继续——处理 PDF 所需的其他工具，全部免费、全部本地运行。