Skip to content
AIFreeConverters

JPG 转 PDF 转换器

A free JPG to PDF converter for JPEG files. Browser-based pairs here usually run in this tab, with no file upload.

将你的 JPG 文件拖放到这里

or 浏览你的设备 · 粘贴快捷键 Ctrl+V

Accepts .jpg, .jpeg, .jpe, .jfif files. You can queue several files; each is processed one after another on your own device.

你的文件永远不会离开这台设备 —— 没有上传,也就没有服务器可以从中删除它们。

使用方法
  1. 01

    添加你的 JPG 文件

    将文件拖放到上方的方框里,或点击浏览选择。它们会直接从磁盘读取 —— 不会发送到任何地方。

  2. 02

    检查设置

    PDF is already selected. Open the gear icon on any row if you want to change quality, dimensions or codec before converting.

  3. 03

    下载你的 PDF

    点击转换,等待该行处理完成。转换多个文件时,可以将它们全部打包为一个 ZIP 一次性下载。

JPG

JPEG

诞生三十年后,依然是照片的默认格式。它的有损压缩会丢弃肉眼几乎察觉不到的细节,质量 75–85 是最佳区间,能大幅缩小文件而不产生可见损伤。不支持透明度。

开发者
Joint Photographic Experts Group
发布时间
1992
扩展名
.jpg, .jpeg, .jpe, .jfif
MIME 类型
image/jpeg
压缩方式
有损
规范
开放

PDF

Portable Document Format

能保证文档在任何地方看起来都一模一样的格式,因为它自带字体、版式和色彩信息。自 2008 年起成为 ISO 标准,是任何需要打印、签署或存档内容的默认格式。

开发者
Adobe
发布时间
1993
扩展名
.pdf
MIME 类型
application/pdf
压缩方式
有损或无损
规范
开放
转换前值得了解
  • JPG is already lossy, and while PDF can be saved either way, this conversion cannot restore discarded details. Saving it lossless here preserves what is already present instead of discarding more.
  • 默认情况下,PDF 页面会精确匹配你的 JPG 尺寸,不做任何裁切或加黑边 —— 如果需要固定页面大小(如 A4 或 Letter),可以在设置中另行选择。
Advertisement
FAQ

关于 JPG 转 PDF 的常见问题

这个 JPG 转 PDF 转换器是免费的吗?

是的。在这里把 JPG 转换为 PDF 完全免费,无需账号、没有水印、也没有每日次数限制。处理在你自己的设备上完成,因此不存在需要转嫁给你的服务器成本。

我的 JPG 文件会被上传到任何地方吗?

For browser-based pairs, your file is read locally and converted by pdf.js in this tab. No file payload is uploaded; you may still see analytics and engine downloads in network logs.

JPG 转 PDF 有文件大小限制吗?

There is no imposed upload cap when it runs in-browser, but each conversion still depends on your device and browser memory. Large videos are the first practical limit, then memory-heavy documents or images.

可以一次把多个 JPG 文件转换为 PDF 吗?

Yes. Drop in several files and each gets its own row; they are processed one after another on your device. You can download them one by one or as one ZIP.

JPG 转 PDF 能在手机、Mac 或 Chromebook 上使用吗?

Most modern browsers on Windows, macOS, Linux, ChromeOS, Android and iOS work. Very large videos are often more reliable on desktop or a browser with more memory.

Why do some conversions take longer on first run?

The conversion engine has to download first. Small codec bundles are fast, while ffmpeg is commonly 12–30 MB; later conversions of similar type use the cached engine.

I converted a file and the output is blank or unusable. What should I check?

Start over with default settings, then change one option at a time (quality, bitrate, page size, or codec) to isolate what changed behavior. If it keeps failing, retry with a smaller file and confirm the source format matches the pair.

将其他格式转换为 PDF

此处共有 21 种格式可以转换为 PDF。

将 JPG 转换为其他格式

一个 JPG 文件可以转换为以下任意一种格式。

相关内容
Advertisement