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 Files" button to select multiple files 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 MOBI:
Name CHM MOBI
Full name Microsoft Compiled HTML Help Mobipocket
File extension .chm .mobi, .prc
MIME application/vnd.ms-htmlhelp application/x-mobipocket-ebook
Developed by Microsoft Mobipocket SA
Type of format Document file format Ebook 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. Mobipocket SA is a French company incorporated in March 2000 that created the .mobi e-book file format and produces the Mobipocket Reader software for mobile phones, personal digital assistants (PDA) and desktop operating systems.
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. The Mobipocket e-book format is based on the Open eBook standard using XHTML and can include JavaScript and frames. It also supports native SQL queries to be used with embedded databases. The Amazon Kindle's AZW format is basically just the Mobipocket format with a slightly different serial number scheme, and .prc publications can be read directly on the Kindle. The Kindle AZW format also lacks some Mobipocket features such as JavaScript.
Associated programs Sumatra PDF, HTML Help Workshop Mobipocket Reader
Sample file sample.chm sample.mobi
Wiki CHM on Wikipedia MOBI on Wikipedia