Convert ebook files online


(AZW, CBZ, CHM, DJVU, DOCX, EPUB, FB2, HTML, MOBI, PDF, SNB or TXT etc.)
Conversion Results:
# Output File Source File Action

Steps:

1. Click "Choose File" button to select a file on your computer. You can also click the dropdown button to choose online file from URL, Google Drive or Dropbox.

2. Choose a target ebook format. The target ebook format can be AZW3, EPUB, DOCX, FB2, HTML, HTMLZ, OEB, LIT, LRF, MOBI, PDB, PMLZ, RB, PDF, RTF, SNB, TCR, TXT or TXTZ.

3. Click "Convert Now!" button to start conversion. The output files will be listed in the "Conversion Results" section. Click icon to show file QR code or save file to online storage services such as Google Drive or Dropbox.

Compare CHM with DOCX:
Name CHM DOCX
Full name Microsoft Compiled HTML Help Office Open XML Document
File extension .chm .docx, .docm
MIME application/vnd.ms-htmlhelp application/vnd.-openxmlformats-officedocument.-wordprocessingml.-document
Developed by Microsoft Microsoft
Type of format Document file format Document file format
Introduction 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. The Office Open XML file formats are a set of file formats that can be used to represent electronic office documents. There are formats for word processing documents, spreadsheets and presentations as well as specific formats for material such as mathematical formulae, graphics, bibliographies etc.
Technical details 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. CHM files support the following features: data compression, built-in search engine, ability to merge multiple .chm help files, extended character support. Office Open XML documents are stored in Open Packaging Convention (OPC) packages, which are ZIP files containing XML and other data files, along with a specification of the relationships between them. Depending on the type of the document, the packages have different internal directory structures and names.
Associated programs Sumatra PDF, HTML Help Workshop Microsoft Office, LibreOffice, Kingsoft Office, Google Docs.
Sample file sample.chm sample.docx
Wiki CHM on Wikipedia DOCX on Wikipedia