CHM is an extension for the Compiled HTML file format, most commonly used by Microsoft¡¯s HTML-based help program. It may contain many compressed HTML documents and the images and JavaScript they link to. CHM features include a table of contents, index, and full text searching.

Microsoft Compiled HTML Help is a Microsoft proprietary online help format, consisting of a collection of HTML pages, an index and other navigation tools. The files are compressed and deployed in a binary format with the extension .CHM, for Compiled HTML. The format is often used for software documentation.

Chm reader for mac free download. SumatraPDF Reader Sumatra PDF is a free PDF, eBook (ePub, Mobi), XPS, DjVu, CHM, Comic Book (CBZ and CBR) viewer for W.

It was introduced as the successor to Microsoft WinHelp with the release of Windows 98 and is still supported in Windows 7. Although the format was designed by Microsoft, it has been successfully reverse-engineered and is now supported in many document viewer applications.

Help is delivered as a binary file with the .chm extension. It contains a set of HTML files, a hyperlinked table of contents, and an index file. The file format has been reverse-engineered and documentation of it is freely available.

1. Apr 26, 2013 A viewer for Microsoft Help 'CHM' (aka Compiled HTML) files on Mac OS X 10.3 using Cocoa, WebKit and chmlib. Kchmviewer is a reader for CHM (Winhelp) and EPUB files using Qt toolkit with optional KDE support. The main point of kchmviewer is compatibility with non-English chm files, including most international charsets.
2. Download: http://files8.blogspot.com/2010/08/archmock.html.

The file starts with bytes 'ITSF' (in ASCII), for 'Info-Tech Storage Format'.

CHM files support the following features:

• Data compression (with LZX compression)
• Built-in search engine
• Ability to merge multiple .chm help files
• Extended character support, although it does not fully support Unicode.

Open/Extract CHM File on Windows

Open/View CHM File on Windows:

You can simply double-click on CHM file to view CHM by Windows built-in CHM viewer program. There are also third-part freeware that open CHM file. For example:

• CHM Viewer
• Sumatra PDF
• XCHM
• FBReader

Extract/Decompile CHM File on Windows:

Easy 7-Zip extracts/decompiles CHM file easily on Windows. The Easy 7-Zip was developed based on 7-Zip. 7-Zip is a famous open source file archiver. The Easy 7-Zip is an easy-to-use version of 7-Zip. The open source freeware keeps all features of 7-Zip and adds a few useful features that makes the software more user-friendly.

Easy 7-Zip works on Windows 10/8.1/8/7/Vista/2008/2003/XP/2000 (both 32-bit and 64-bit compatible).

1. Free Download Easy 7-Zip
2. Install Easy 7-Zip by step-by-step instructions
3. Open CHM file with Easy 7-Zip
   You will see files or folders within the CHM file then, click button Extract to extract the CHM file.
   
4. Alternatively, Right-click on CHM file on Windows Explorer

And then, choose Extract files..., Extract Here, or Extract to 'folder' to extract the CHM file.

5. Done

Easy 7-Zip Download Links:

Chm Reader For Mac Free Downloads

You can try other alternative freeware that extracts/decompiles CHM file on Windows. For example:

• PeaZip
• B1 Free Archiver
• Zipeg
• Universal Extractor
• Bitser

Open/Extract CHM File on Mac

Open/View CHM File on Mac:

You need to install CHM viewer software to view CHM on Mac. You can choose one or more the following CHM viewer freeware.

• XCHM
• FBReader
• Apple Safari
• Mozilla Firefox

Extract/Decompile CHM File on Mac:

B1 Free Archiver extracts/decompiles CHM file on Mac. B1 Free Archiver is a free software for creating archive folder and extracting archive file. B1 Archiver works on all platforms - Windows, Linux, Mac and Android. The freeware supports most popular formats including CHM.

B1 Free Archiver is compatible with:

• Mac OS X 10.9 Mavericks
• Mac OS X 10.8 Mountain Lion
• Mac OS X 10.7 Lion
• Mac OS X 10.6 Snow Leopard

Open/Extract CHM File on Linux

Open/View CHM File on Linux:

You need to install CHM viewer software.

Another software is xchm.

Convert CHM to PDF on Linux:

You need to install conversion utility chm2pdf.

Install chm2pdf on CentOS and Fedora

Install chm2pdf on Debian and Ubuntu

Convert CHM to PDF on Linux

Extract/Decompile CHM File on Linux:

You need to install libchm-bin.

Install cabextract on Debian and Ubuntu

Extract/Decompile a CHM file, type:

You can also use p7zip to decompile CHM file, just install p7zip-full, and then use command 7z to extract file from CHM file.

PDF is a great format for distribution and sharing of files, you can open it, print it, even copy text from it, but the major downside, of course, is that you can't edit PDF files easily and freely once it’s been created. In this case, a free PDF Editor for Mac is extremely useful as it allows you to edit and re-master PDF documents. Here we have rounded up several best free PDF Editor for mac that everyone should try, you can choose the one fits your needs from the list according to information covered in the following parts.

All-in-One Mac PDF Editor and Manager

• Edit PDFs: crop, add text/shape, sign, comment, annotate, underline, strikethrough, etc
• Convert native PDF to 13 formats (Word, PowerPoint, Keynote, Pages, ePub, etc.)
• Create PDF from Word, PowerPoint, ePub, CHM, etc.
• Merge and split PDFs
• Encrypt and decrypt PDFs
• Compress PDFs
• Extract image from PDFs

Part 1. Best Free PDF Editor for Mac---Desktop Freeware

Foxit Reader for Mac

Foxit Reader for Mac is a free PDF editor for mac, fast and lightweight. PDF users may be quite familiar with Foxit, the leading PDF software developer to offer PDF solutions. With Foxit PDF Reader for mac, users can view, highlight, add bookmarks & comments,search and protect PDFs for free. Even, you can convert PDF to cPDF with this free PDF Editor for mac.

Preview

Your Mac comes with Preview, which is adequate for reading and managing PDF files, even doing some editing: It’s basically a limited PDF editor on mac for free, and there’s no download required! But if you've run the gamut (no pun intended) with what you can do with Preview, you're probably in need of something a bit more sophisticated.

With Preview, you can zoom, split, merge PDFs, add highlights and notes, rotate, add bookmark, protect PDF, and export to other editable formats.

Skim

Skim is a PDF reader and note-taker for OS X. Most of the major features you need are covered by Skim including: adding and editing notes, highlighting important text, making snapshots for easy reference and navigation using table of contents or thumbnails, with visual history.

Part 2. Best Free PDF Editor for Mac---Web-based Service

PDFescape

PDFescape is an online PDF reader and editor. You are also allowed to create fillable pdf forms, protect pdf files with this free service. All you need to use is a JavaScript enabled web browser.

PDF Filler

PDF Filler is another web-based free PDF Editor for mac and Windows users to manipulate PDF online. It supports multiple ways to upload PDF files into its server for free editing, such as URL, Dropbox, Google Drive, OneDrive. Users are allowed to view, highlight, sign, add images, search PDF for free.

PDF Buddy

PDF Buddy is another online site that allows users to edit and manipulate PDF files. Features include the ability to add text, to annotate, to insert images and signatures, even split and merge PDF files.

Notes: Also, you can use Jotform to edit PDF online if you need extra recommendation. Online PDF Editor is easy to use, just follow the user-friendly interface to edit your PDFs. You are not recommended to upload complicate and confidential PDFs for editing.

Part 3. Things You Need to Know about Free PDF Editor for Mac

Although we have listed the best free PDF editors for Mac, they may fall short of PDF users' expectation in one way or another. Free PDF editor for Mac is able to finish the basic work and costs free, but it has some nonnegligible drawbacks. Check the following reasons that why you should ditch the free PDF editor for Mac and seek out a new solution on how to edit pdf.

1. Some free PDF editors for Mac are not powerful enough, so you have no ways to open the PDF files in big size.
2. When you try to handle the PDF files in some free tools, you may find the handwriting is blur and bewildering.
3. Some free Mac PDF editors are not fluid, thus the screen might get stuck.
4. For all I know, free online PDF editors are not particularly safe, you may have the opportunity to encounter the virus and receive junk mails.

Part 4. Extended: Best PDF Editor for Mac

Of course, when it comes to professional Mac PDF Editor for mac, the best-known tool is Adobe Acrobat, and no wonder: Adobe Systems created the PDF standard. However, Acrobat is not so affordable for many PDF users, and not all of its features needed to be frequently used. But since PDF is an open format, other Adobe alternatives which are considerably cheaper also allow you to edit PDF files.

Cisdem PDFMaster for Mac

Cisdem PDFMaster comes with a full set of tools you need to edit, convert and manage PDF files on Mac as easy as in a Word processor. It basically meets all your needs to process a PDF on mac. By simply dragging and dropping PDF files, you can manage single or multiple PDF files at the same time, which makes the PDF editing and management highly efficient and extremely easy.

Main Features of Cisdem PDFMaster

• Basic PDF Editing features: crop, add text or shape; annotate, comment, highlight, sign, etc.;
• Convert PDF to 13 formats: Word, PowerPoint, Keynote, Pages, ePub, HTML, RTFD, Text and Image;
• Create PDF from Word, PowerPoint, ePub, HTML, CHM, Image and so on;
• Merge and split PDFs;
• Compress PDFs;
• Encrypt PDFs;
• Decrypt PDFs;
• Extract image from PDFs;
• Support batch process PDFs;

Free Download​

Choose Your Best PDF Editor for Mac

Chm To Pdf For Mac

Final Words

Free Chm Reader For Mac

Free PDF editor for mac is a real work, but when taking performance and security into consideration, they may disappoint you. If you need some of the additional features that come with the product and/or have a business operation that handles a lot of PDF documents, paid PDF Editor for Mac is the best choice. What did you go with? Let me know in the comments.