PDF 转 PowerPoint
把每一页变成一张可以用来演讲的幻灯片。
这款工具完全在你的浏览器中运行。文件从不上传，你可以在浏览器的网络标签中亲自验证这一点。 亲自验证：打开浏览器的网络标签观察。你会看到一个查询你是否还有剩余任务的小请求，只包含工具名称和一段哈希，绝不会包含文件。
这款工具的作用
A PDF of a deck is not a deck. The layouts, the editable shapes and the animations were discarded when the PDF was written, and nothing can bring them back. What this builds is a presentation of those pages: each page rendered as a full-slide image, with its text carried alongside as the slide title and either as bullets or as speaker notes.
Use it when you have to present from a PDF and the original file is gone: a conference that only accepts PowerPoint, a handout you want to draw on while talking through it, or one page from someone else's document that belongs in a deck of your own.
工作原理
- Drop the PDF onto this page. One file at a time, up to 200 MB.
- Choose what each slide holds: the page as an image, its text only, or both.
- Pick 16:9 or 4:3 to match the projector or the template you will paste into.
- Set the resolution for the page images. 150 dpi is enough for a projector; go higher only if the deck will be printed.
- Decide whether the page text becomes speaker notes or bullets on the slide itself.
- Press Convert to PowerPoint and the .pptx downloads on its own.
The three modes are three different trades. Image gives a slide that looks exactly like the page, because it is a picture of the page, and nothing on it can be edited except what you add on top. Text keeps the words and throws the design away. Both, the default, puts the picture on the slide and keeps the words with it, so the deck stays searchable even though what you see is an image.
The first line of each page becomes the slide title. It is a guess, and it will sometimes pick up a running header. It is still worth making: PowerPoint builds its outline view, its slide sorter labels and its reading order from slide titles, and a fifty-slide deck where nothing has a name is harder to work with than one with fifty imperfect titles you can fix in a minute.
Where the text goes changes what the deck is for. With text as notes on, the whole page text sits in the notes pane, out of the audience's sight but still findable by search. With it off, up to eleven lines after the title are placed on the slide as bullets - right when you plan to rewrite them into a real slide, wrong for a dense page, which does not become a good slide by being cut to eleven lines.
PDF pages are rarely slide-shaped. An A4 or Letter page is taller than it is wide and a 16:9 slide is much wider than it is tall, so a portrait page cannot fill the slide and leaves space at either side. 4:3 wastes less for portrait pages; 16:9 is the default because it is what projectors and laptop screens made in the last decade expect.
Pages are rendered and the .pptx is assembled on your device, the presentation package written and zipped in the browser. Nothing is uploaded, so an unpublished deck stays where it is, and the only request a run makes is the allowance check - a tool name and a hash of the bytes.
这款工具做不到的事
- Nothing of the original presentation is recovered. Layouts, master slides, editable shapes, charts and animations were gone before the PDF existed, and this builds a new deck from the pages rather than restoring the old one.
- A PDF page is rarely the shape of a slide, so a portrait page placed on a 16:9 slide cannot fill it and leaves empty space at the sides.
常见问题
- 幻灯片可以编辑吗？
- 部分可以，取决于模式。页面图像是一张图片，无法编辑，不过你可以像在任何图片上一样在它上面绘制、输入和放置形状。页面文本会作为真正的标题过来，并在关闭备注时作为你可以重写的要点文字过来。原演示文稿的形状、图表和动画无法找回，因为 PDF 从来就不包含它们。
- 图像、文本还是两者——有什么区别？
- 「图像」把每一页渲染成图片放到幻灯片上，所以它看起来和 PDF 完全一样。「文本」跳过图片，只保留文字，可以编辑但会丢失设计。「两者」是默认：图片放在幻灯片上，文字作为标题和备注随它一起带过来。
- 为什么我的文本最后进了演讲者备注？
- 因为那是默认，而对于以页面图像为主的演示文稿，那通常是对的地方：备注窗格里放着整页文本，观众看不到，但 PowerPoint 的搜索仍能找到它。把这个选项关掉，标题之后最多十一行就会作为要点放到幻灯片上。
- 我该选 16:9 还是 4:3？
- 16:9 几乎匹配过去十年里制作的每一台投影仪、笔记本和会议模板，也是默认。为较旧的机构模板、或当你的页面是纵向时选 4:3——一张高的页面在 4:3 幻灯片上浪费的空间比在宽幻灯片上少。
- 我的文档会被发到服务器吗？
- 不会。页面在你的浏览器中渲染，.pptx 包也在那里生成，文件的任何部分都不会被传输。在转换时看着开发者工具的网络标签，你会看到什么都没发出去。页面加载一次之后，这款工具也能离线运行。