Free CHM Reader
Open CHM Files Online

Upload your .chm file here and it opens in the browser on macOS, Linux, ChromeOS, iOS or Android. CHM is a Windows help format, so most non-Windows systems cannot open it natively — ReadLoudly extracts the content for you.

CHM stands for Compiled HTML Help — Microsoft's bundled help-file format, used for Windows application help and a great many older technical manuals and programming references.

Yes. ReadLoudly extracts the readable text from each CHM topic and narrates it with AI voices, which suits long technical manuals you want to work through hands-free.

ReadLoudly reads the CHM table of contents and presents topics in order, so a multi-hundred-page manual stays navigable rather than collapsing into one wall of text.

Yes. Reading and listening to CHM files is free, with no account required to start and no watermark on anything. Paid plans — Core at $5/month, Plus at $10/month, Pro at $19/month — raise the upload size limit, unlock all 1200+ AI voices, add MP3 downloads and offline listening, and remove ads.

Yes — CHM is fully supported on this page, and it is one of 24 formats ReadLoudly reads aloud: documents (PDF, DOCX, ODT, RTF), ebooks (EPUB, MOBI, AZW, FB2, CHM, LRF, LIT, PDB, RB), text and web files (TXT, HTML), comics (CBR, CBZ), and images (via OCR) (JPG, PNG, GIF, BMP, WEBP, TIFF, SVG). Upload a CHM file here and it opens straight away; any other format on that list has its own reader page.

Yes. This reader runs in the mobile browser on iOS and Android — nothing to install — so you can open a CHM file straight from your phone's Files app, an email attachment or a cloud drive. Playback continues in the background, and your position syncs to any other device you sign in on.

It is parsed to extract its text, then removed from the processing servers. ReadLoudly does not train models on your files, does not share them with third parties, and does not make them visible to anyone else. Signed-in users can choose to keep a CHM file in their own private library; a guest upload is discarded when the session ends.

CHM is Microsoft Compiled HTML Help, the format behind classic Windows help files and many technical manuals. ReadLoudly opens it directly in the browser, so you do not need the original software that created it.

Every format gets its own reader page rather than being funnelled into one generic uploader, so nothing loses its format-specific handling. Nearest neighbours to CHM among ReadLoudly's ebooks: LRF, LIT, PDB, RB. The Tools page lists all of them.