一张收据、会议后的白板，或是拍摄在厨房桌子上的三页合同。你的 iPhone 将它们保存为 HEIC 格式，而接收方则需要一个 PDF 文件。 将它们添加到这里。上传 HEIC 和 HEIF 照片，系统将根据文件内容而非文件名进行识别；如果上传了 JPG、PNG 或 WebP 文件，该文件将在其卡片处被拦截，并提供一个指向为其创建的同类文件的链接，其余文件则继续处理。在 iPhone 或 iPad 上，照片库可能会向网站提供 JPG 而非 HEIC，因此此时 JPG 的卡片会提示这一点，并让你选择：继续使用 JPG，或从“文件”中选择原始 HEIC。每张照片将成为一页，并保持手机拍摄时的方向，卡片上的数字即为页码。拖动卡片即可移动位置，或打开其菜单并使用“移动到…”输入页码。 设置按钮显示页面设置，例如 A4 · 自动 · 小页边距。每张照片都会在不被裁剪的情况下缩放以适应页边距。“适应图像”则使每页的形状与照片一致。 点击 Save PDF；在 iPhone 或 iPad 上，该按钮显示为 Prepare PDF，点击 Save 或 share 后，PDF 将被发送至分享面板，你可以在那里选择“文件”或其他应用。PDF 本身无法包含 HEIC 格式，因此每张照片将以高质量 JPG 形式存入，且 iPhone 照片的广色域将转换为 PDF 阅读器支持的标准颜色。由于 JPG 的压缩率低于 HEIC，生成的 PDF 文件通常比原照片大。“较小文件”选项会将大照片的长边缩小至 2000 像素，且仅在确实能减小文件体积时才执行。 剔除内容：照片中存储的地点、日期和相机详情，Live Photo 的视频部分，以及你的文件名。照片中的文本仍为文本图像，因此你可以阅读但无法搜索。 我的指南涵盖了 HEIC 与 HEIF 的区别、方向与颜色、合并多张照片，以及如何将照片以 HEIC 格式从 iPhone 导出。
A receipt, a whiteboard after the meeting, three pages of a contract photographed on the kitchen table. Your iPhone saved them as HEIC, and the place that wants them wants one PDF. Add them here. HEIC and HEIF photos go in, recognised from what is inside the file rather than its name; a JPG, PNG or WebP that ends up here is stopped on its card with a link to the sibling made for it, and the rest carry on. On an iPhone or iPad the photo library can hand a website a JPG instead of the HEIC, so there a JPG's card says so and lets you choose: continue with the JPG, or pick the original HEIC from Files. Each photo becomes a page, upright the way your phone took it, and the number on its card is its page number. Drag a card to move it, or open its menu and use Move to… to type a page number. The settings button shows the page setup, for example A4 · Automatic · Small margin. Every photo is scaled to fit inside the margins without being cropped. Fit to image makes each page the shape of its photo instead. Tap Save PDF; on an iPhone or iPad it reads Prepare PDF, and Save or share then hands the PDF to the share sheet, where you pick Files or another app. A PDF cannot hold HEIC itself, so each photo goes in as a high-quality JPG, and the wide colours of iPhone photos are converted to the standard colours PDF readers expect. Because JPG is less compact than HEIC, the PDF usually comes out larger than your photos. Smaller file brings large photos down to 2000 px on the long side, and only where that really makes the file smaller. What stays out: the location, dates and camera details stored in your photos, the video part of a Live Photo, and your file names. Text in a photo stays a picture of text, so you can read it but not search it. My guides cover HEIC versus HEIF, orientation and colour, combining many photos, and getting photos off an iPhone as HEIC.
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