CHM to PDF Converter

Convert CHM to PDF online, for free.

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Advanced settings (optional)

Optimize for e-book reader

Optimizes layout and formatting for a specific e-reader. Choose the one that matches your device.

Enable Heuristic processing?

Attempts to detect and correct common styling problems in the source file. Experimental, so check the output before relying on it.

Add margins (cm)

Enter margin in cm (0 - 10)

Rescale all fonts (pts)

The base font size is the size of the bulk of the text in your document. Set it and we rescale every font size proportionately, so the most common size becomes your chosen value and headings, captions, and other text scale with it. Select "No Change" to keep the original sizes.

Replace Unicode characters with ASCII?

Replace Unicode characters with ASCII? Replaces Unicode characters with their closest ASCII equivalents, for readers that cannot display accented or non-Latin text.

Replaces Unicode characters with their closest ASCII equivalents, for readers that cannot display accented or non-Latin text.

Specify input file encoding

Helpful for eBooks without an encoding declaration or declare an erroneous one. This option will override existing encoding declarations.

Change e-book title

Enter Title, maximum 100 characters

Change e-book author-name

Enter Author Name, maximum 100 characters

How to Convert CHM to PDF?

Click the “Choose Files” button to select your CHM files.
Click the “Convert to PDF” button to start the conversion.
When the status change to “Done” click the “Download PDF” button

Easy to Use

Simply upload your CHM files and click the convert button. You can also batch convert CHM to PDF format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our CHM to PDF Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 8 hours.

What is a CHM (Compiled HTML Help) file?

Compiled HTML Help (CHM) is Microsoft’s format for software documentation and online help. A CHM packs a set of HTML pages, images, and scripts into one compressed file, along with a table of contents, an index, and a full-text search database. It was the standard help system for Windows applications for many years, and it is still used for reference manuals and technical e-books because everything ships as a single, searchable file.

How to open a CHM file?

Windows includes a built-in viewer, so double-clicking a CHM usually opens it straight away. If the pages appear blank, right-click the file, choose Properties, and click Unblock — Windows restricts help files downloaded from the internet.

On macOS and Linux, use xCHM or KchmViewer. Calibre also opens CHM files and converts them to EPUB or PDF, which is a good way to read one on a tablet or e-reader.

Developed by: Microsoft

Initial Release: 1997

What is a PDF (Portable Document Format) file?

The Portable Document Format (PDF) is a universal file format that comprises characteristics of both text documents and graphic images which makes it one of the most commonly used file types today. The reason PDF is so widely popular is that it can preserve original document formatting. PDF files always look identical on any device or operating system.

How to open a PDF file?

Most people head right to Adobe Acrobat Reader when they need to open a PDF. Adobe created the PDF standard and its program is certainly the most popular free PDF reader out there. It's completely fine to use, but I find it to be a somewhat bloated program with lots of features that you may never need or want to use.

Most web browsers, like both Chrome and Firefox, can open PDFs themselves. You may or may not need an add-on or extension to do it, but it's pretty handy to have one open automatically when you click a PDF link online. I highly recommend SumatraPDF or MuPDF if you're after something a bit more. Both are free.

Developed by: ISO

Initial Release: 15 June 1993

Useful links:

https://en.wikipedia.org/wiki/Portable_Document_Format

https://acrobat.adobe.com/us/en/why-adobe/about-adobe-pdf.html

Convert other files to PDF format

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Convert Your CHM files to other formats

FreeConvert.com can convert your CHM files to these other formats:

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