Convert PDF to CHM Online — Free
Fast, free PDF to CHM converter. No registration required.
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How to Convert
Upload your .pdf file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .chm file when it's ready.
What is PDF?
PDF is the universal standard for document sharing. It preserves formatting across all devices and platforms, making it ideal for official documents, forms, and publications.
Format Details
- Full Name
- Portable Document Format
- Extension
Key Features
- Universal format
- Preserves formatting
- Print ready
- Form support
What is CHM?
CHM (Compiled HTML Help) is Microsoft's proprietary help file format introduced with Windows 98. It compiles HTML pages, images, and an index into a single compressed archive viewed with the Windows Help viewer.
Format Details
- Full Name
- Compiled HTML Help
- Extension
- .chm
Key Features
- Compiled HTML
- Search index
- Table of contents
- Windows Help viewer
PDF vs CHM
| Feature | CHM | |
|---|---|---|
| Full Name | Portable Document Format | Compiled HTML Help |
| Extension | .chm | |
| Best For | Universal format | Compiled HTML |