OpenAnyFile
Works
Viewing, inspecting and verifying. You get a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis. File details, exact byte size and the detected signature are always shown.
How to open a .lit file
You have a LIT file and nothing on your machine will touch it. Here is what the format actually is, and how to read one in about four seconds without installing anything.
What is a .lit file?
Microsoft Reader eBook is a binary & system format developed by Microsoft, first appearing in 2000. It is normally produced by Microsoft Reader.
A DRM-wrapped relative of the CHM/ITSS family. Microsoft retired Reader in 2012, which stranded purchased libraries in a format with no supported reader left.
| Full name | Microsoft Reader eBook |
|---|---|
| File category | Binary & system |
| MIME type | application/x-ms-reader |
| Magic bytes (file signature) | 49 54 4F 4C 49 54 4C 53 (ITOLITLS) |
| Developer | Microsoft |
| Introduced | 2000 |
| Usually created by | Microsoft Reader |
| OpenAnyFile engine | universal hex inspector |
| Opens without upload | Yes — parsed locally in your browser |
Open a .lit file in your browser
OpenAnyFile routes .lit to its universal hex inspector, which inspects a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis.
- Open the OpenAnyFile opener in this browser — nothing to download or sign up for.
- Drag your .lit file onto the drop zone, click to browse for it, or paste it with Ctrl+V.
- The extension is detected and the file is handed to the universal hex inspector.
- Your LIT opens on its own viewer page: a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis.
- Use fullscreen for a closer look, or download the file back out unchanged. Works the same on Windows, macOS, Linux, Android and iOS, because it is just a web page.
What you can and cannot do with it here
Does not work
Full-fidelity rendering. This extension has no standard structure, so you get a byte-level inspection rather than a rendered view.
No upload, and here is why that matters for {E}
Handing a .lit file to a random conversion site means handing over a copy you cannot get back. OpenAnyFile parses the file locally instead — the same way special software reads it off your disk, except the reader happens to be a web page. Nothing is transmitted, so there is nothing to leak, log or subpoena. It also means it keeps working with your Wi-Fi switched off.
Frequently asked questions about LIT files
Can I open a .lit file without installing special software?
Yes. OpenAnyFile's universal hex inspector runs in your browser, so you can read a LIT file with nothing installed. You get a byte-level hex and ASCII dump alongside the detected signature, exact size and type analysis. It will not replace the original application for editing, but it answers 'what is in this file' in seconds.
How can I check a file really is a LIT file?
Look at the first bytes rather than the extension. A genuine LIT begins with 49 54 4F 4C 49 54 4C 53 (ITOLITLS). Opening the file in OpenAnyFile shows that signature in the file-details panel, so a file renamed to .lit by mistake is easy to spot.
Is it safe to open a LIT file online?
With OpenAnyFile, yes, because nothing is uploaded. The file is read locally through your browser's File API and never leaves your device, so there is no server copy to leak, log or retain. That matters most for the kind of file people are least willing to hand to a random converter site.
What is a .lit file, exactly?
Microsoft Reader eBook — an application/x-ms-reader format created by Microsoft since 2000. A DRM-wrapped relative of the CHM/ITSS family. Microsoft retired Reader in 2012, which stranded purchased libraries in a format with no supported reader left.
Does the same viewer handle formats related to LIT?
Yes — the same engine also opens .dll, .doc, .exe, so you can compare related files without switching tools.
Related formats
These open with the same engine, so if you have one of these sitting next to your .lit file, it will open too: