IMG和ISO文件是两种常见的磁盘映像文件格式。它们通常用于将光盘(backup the content and file system of optical discs)（CD、DVD和蓝光光盘(Blu-ray Disc)）的内容和文件系统存储、分发或备份到另一个光盘或设备。
尽管有许多相似之处和实际用途，但ISO被广泛接受为光盘映像的标准/格式。ISO 文件(ISO files)与几乎所有操作系统 (OS) 以及磁盘刻录软件兼容。许多设备和操作系统都有内置工具，可以提取和读取ISO格式的光盘文件。
(IMG)另一方面，IMG文件通常被压缩，因此某些设备和磁盘映像软件(disk imaging software)无法读取。由于接受度和兼容性方面的差异，许多用户更喜欢使用ISO格式的磁盘映像/文件。
如果您发现自己需要将光盘映像文件从 .img 格式转换为 .iso，本文中的工具和转换方法会派上用场。它们与Windows和Mac设备相关。
1.重命名文件扩展名
IMG和ISO光盘映像文件具有相同的数据结构，只是前者可以压缩而后者不能。如果IMG文件未压缩，您可以通过重命名文件扩展名轻松地将其转换为ISO。图像文件的内容将正常运行并保持不变。
右键单击(Right-click)IMG文件(IMG)并在上下文菜单中选择重命名。(Rename)将格式（在句点符号之后）从 .img 更改为.iso，然后按键盘上的Enter 。
打开重命名的文件并检查您的计算机是否可以挂载ISO文件。如果您收到“光盘映像文件已损坏”的错误消息，则IMG文件很可能已被压缩。将文件扩展名恢复为.img并使用以下其他方法转换为ISO。
快速提示：(Quick Tip:)如果您无法更改文件扩展名，因为IMG文件的名称没有附加 .img 扩展名后缀，以下是如何让Windows显示文件扩展名。
启动文件资源管理器并转到查看(View)选项卡。然后，选择快速访问工具栏上的选项。(Options)
在“文件夹选项(Folder Options)”窗口中，转到“查看”(View)选项卡并取消选中“隐藏已知文件类型的扩展名”(Hide extensions for known file types)选项。选择应用(Apply)，然后选择确定(OK)。您要转换的IMG文件现在应该在其文件名中带有(IMG).img后缀。
2.使用第三方软件
有很多文件管理工具可以提供文件转换服务并且做得非常出色。我们测试了其中一些程序，这些是我们的最爱。
1.PowerISO
该工具可让您将大约 30 种不同的图像文件格式转换为ISO。虽然文件转换速度取决于文件大小，但 PowerISO(PowerISO)将我们的示例IMG文件快速转换为ISO 。
重要的是要注意PowerISO在免费增值模式上运行。免费版与付费/注册版一样快地完成工作，但有一些限制。首先(First)，作为免费用户，您不能创建、编辑或转换大于 300MB 的文件。其次，每次启动应用程序时，您必须查看一个 5 秒的弹出窗口（敦促您为应用程序付费）。
从开发者网站下载 PowerISO(Download PowerISO)并将其安装在您的 PC 上。从菜单栏中选择工具，然后选择(Tools)转换文件格式(Convert file format)。
选择源文件(Source file)对话框旁边的文件夹图标以选择IMG文件，如果您希望使用密码保护生成的ISO文件，请选中启用密码保护(Enable password protection)框，然后单击确定(OK)开始转换。
2.MagicISO
这是另一个将IMG文件转换为ISO的好工具。它可以在一次操作中转换多达 10GB 的文件（转换为ISO格式），但免费版本有 300MB 的限制。与PowerISO不同，您在启动应用程序时或使用过程中的任何时候都不会出现烦人的弹出窗口。
在您的 PC 上安装并启动该应用程序，然后继续选择菜单栏上的工具并选择(Tools)转换(Convert)。
单击选择源文件(Choose source file)旁边的文件夹图标，然后选择要转换的IMG文件。(IMG)确认(Confirm)输出格式设置为标准 ISO(Standard ISO)映像文件 ( .ISO )，然后单击转换(Convert)。
在 Mac 上将 IMG 转换为 ISO
上述应用程序仅与Windows PC(Windows PCs)兼容。如果您使用MacBook或 iMac，有一种简单的方法可以将IMG转换为ISO，而无需安装第三方软件。您只需要终端(Terminal)应用程序。
1. 转到应用程序(Applications )>实用程序( Utilities)并启动终端(Terminal)应用程序。
2. 键入或粘贴hdiutil convert并留一个空格。
3. 将要转换的IMG文件拖入(IMG)终端(Terminal)控制台。按空格键留出空格并继续下一步。
4. 在控制台中键入或粘贴-format UDTO -o并按空格键。
5.再次(Again)，将要转换的IMG文件拖到(IMG)终端(Terminal)中，但这一次，将文件扩展名从 .img 重命名为.iso。您应该有一串命令，如下所示。
hdiutil convert /Users/name/folder/File.img -format UDTO -o /Users/name/folder/File.iso
6. 最后按回车(Return)键执行命令。
终端将在与原始(Terminal)IMG文件相同的路径中以CDR格式（即.iso.cdr ）创建文件的新副本。
CDR是ISO磁盘映像文件的Mac变体。重命名新生成的文件（从文件名中删除 .cdr 扩展名）并按Enter。
在确认提示中选择使用 .iso 。(Use .iso)
就是这样; 您已成功将IMG文件转换为ISO。您还可以使用此技巧将DMG文件转换为ISO。
IMG 转 ISO 瞬间
这些是您可以用来可靠地将IMG文件转换为ISO的方法和实用程序。如果您是Windows用户，那么第三方软件是您的最佳选择。或者，将IMG文件传输到外部存储设备并在Mac上免费转换，没有任何大小限制。如果您遇到困难、需要进一步的帮助或有其他同样有效的方法，请发表评论。
How to Convert IMG Files to ISO
IMG and ISO files are two common disk image file formatѕ. They are often used to storе, distribute, or backup the content and file system of optical discs (CD, DVD, and Blu-ray Disc) to another disc or device.
Despite having many similarities and practical usage, ISO is widely accepted as the standard/format for disc images. ISO files are compatible with almost all operating systems (OS) as well as disk burning software. Many devices and OS have built-in tools that can extract and read disc files in ISO formats.
IMG files, on the other hand, are commonly compressed and therefore unreadable by some devices and disk imaging software. Due to this disparity in acceptance and compatibility, many users prefer to have disk images/files in ISO format.
If you find yourself needing to convert a disc image file from .img format to .iso, the tools and conversion methods in this post would come in handy. They’re relevant to both Windows and Mac devices.
1. Rename the File Extension
IMG and ISO disc image files have an identical data structure, save for the fact that the former can be compressed while the latter cannot. If an IMG file is uncompressed, you can easily convert it to ISO by renaming the file extension. The contents of the image file will function properly and remain unchanged.
Right-click on the IMG file and select Rename in the context menu. Change the format (after the period symbol) from .img to .iso and press Enter on your keyboard.
Open the renamed file and check if your computer can mount the ISO file. If you get an error that reads “The disc image file is corrupted,” the IMG file is most likely compressed. Revert the file extension back to .img and use other methods below to convert to ISO.
Quick Tip: If you’re unable to change the file extension because the IMG file doesn’t have a .img extension suffix attached to its name, here’s how to make Windows show the file extension.
Launch File Explorer and go to the View tab. Afterward, select Options on the Quick Access Toolbar.
In the Folder Options window, go to the View tab and uncheck the Hide extensions for known file types option. Select Apply and then OK. The IMG file you want to convert should now carry a .img suffix in its filename.
2. Use Third-Party Software
There are a bunch of file management tools that offer file conversion services and do so brilliantly. We tested some of these programs and these are our favorites.
1. PowerISO
This tool lets you convert about 30 different image file formats to ISO. Although file conversion speed depends on file size, PowerISO converted our sample IMG file to ISO quickly.
It’s important to note that PowerISO operates on a freemium model. The free version gets the job done just as fast as the paid/registered version, but with some limitations. First, you cannot create, edit, or convert files greater than 300MB as a free user. Secondly, there’s a 5-seconds pop-up (urging you to pay for the app) that you must view each time you launch the app.
Download PowerISO from the developer’s website and install it on your PC. Select Tools from the menu bar and choose Convert file format.
Select the folder icon next to the Source file dialog box to choose the IMG file, check the Enable password protection box if you wish to secure the resulting ISO file with a password, and click OK to start the conversion.
2. MagicISO
This is another great tool to convert IMG files to ISO. It can convert up to 10GB files (to ISO format) in a single operation but the free version has a 300MB limitation. Unlike PowerISO, you don’t get annoying pop-ups when you launch the app or anytime during usage.
Install and launch the app on your PC, then proceed to select Tools on the menu bar and choose Convert.
Click the folder icon next to Choose source file and select the IMG file you want to convert. Confirm that the output format is set to Standard ISO image file (.ISO) and click Convert.
Convert IMG to ISO on Mac
The apps mentioned above are only compatible with Windows PCs. If you use a MacBook or an iMac, there’s an easy way to convert IMG to ISO without having to install third-party software. All you need is the Terminal app.
1. Go to Applications > Utilities and launch the Terminal application.
2. Type or paste hdiutil convert and leave a space.
3. Drag the IMG file you want to convert into the Terminal console. Press the spacebar to leave a space and proceed to the next step.
4. Type or paste -format UDTO -o in the console and press the spacebar.
5. Again, drag the IMG file you want to convert into Terminal but this time, rename the file extension from .img to .iso. You should have a string of commands like the one below.
hdiutil convert /Users/name/folder/File.img -format UDTO -o /Users/name/folder/File.iso
6. Finally, press Return to execute the command.
Terminal will create a new copy of the file in CDR format (that is, .iso.cdr) in the same path as the original IMG file.
CDR is the Mac variant of an ISO disk image file. Rename the newly-generated file (delete the .cdr extension from the filename) and press Enter.
Select Use .iso on the confirmation prompt.
That’s it; you’ve successfully converted the IMG file to ISO. You can also use this trick to convert DMG files to ISO.
IMG to ISO in a Twinkling
These are the methods and utilities you can use to reliably convert IMG files to ISO. If you’re a Windows user, a third-party software is your best bet. Alternatively, transfer the IMG file to an external storage device and convert it for free on a Mac without any size limitation. Drop a comment if you’re stuck, need further assistance, or have other methods that are just as effective.
