PDF转灰度
将彩色PDF转为黑白。
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支持格式: PDF
免费 · 无需注册 · 大多数工具文件不离开您的设备
此工具完全在您的浏览器中运行——文件不会被上传。
使用方法
1
上传
2
设置
3
下载
常见问题
Is PDF转灰度 free?
Yes. PDF转灰度 is completely free with no sign-up, no watermark and no daily limit. There is no paid tier — every tool on iAdorePDF is free to use as often as you like.
Is PDF转灰度 safe and private?
Yes. PDF转灰度 runs entirely inside your browser, so your file is never uploaded to any server. Nothing leaves your device, which makes it safe for confidential documents.
Do I need to install any software?
No. PDF转灰度 works in any modern browser — Chrome, Safari, Firefox or Edge. There is nothing to download and no account to create.
Does PDF转灰度 work on a phone?
Yes. PDF转灰度 is built mobile-first and works on iPhone and Android exactly as it does on a computer, straight from the browser.
How do I use PDF转灰度?
Open the page, drop your file into the upload box (or tap Select file), choose your options, then press the start button. Your result downloads straight to your device.
Is there a file size limit?
There is no server limit because the work happens on your own device. The practical ceiling is your device memory; files up to about 100 MB are comfortable on most phones and much larger on a computer.