CONVERT LIT → FB2 (LIT to FB2)
Fast, secure LIT to FB2 conversion. No registration required.
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Studio Panel
Ghostscript + QPDFHOW TO CONVERT LIT → FB2
Start the job
Upload a LIT; we read metadata, cover image and table of contents from the source container.
Rewrite as FB2
The content is flowed into the FB2 format with appropriate CSS, images re-encoded at recommended dimensions.
Save the ebook
Download the FB2. Side-load to your device or drop into your reader library.
Setup: LIT is Microsoft Reader's legacy ebook format, discontinued since 2012. Goal: an interchangeable FB2. A FB2 converted from a LIT is a new ebook container with the same content inside. The text body survives losslessly; formatting survives as closely as the FB2 container supports it; cover images are re-embedded at the target's recommended dimensions. Keep in mind LIT is Microsoft Reader's legacy ebook format, discontinued since 2012. And remember that FB2 is FictionBook, a popular XML-based open ebook format in Russian-speaking markets.
Why convert LIT to FB2
Library applications (Calibre, Apple Books, Kindle library) prefer a single format for indexing. Converting mixed LIT/FB2 collections to one canonical FB2 makes search, filter and sync work reliably.
LIT vs FB2 — Technical specifications
Side-by-side comparison of the technical details.
LIT
- MIME type
- application/x-ms-reader
- Extension
- .lit
- Container
- CHM-like (LZX-compressed OEBPS)
- DRM
- Microsoft Reader activation (servers offline since 2012)
- Status
- Retired
- MIME Type
- application/x-ms-reader
- Category
- eBooks
- Full Name
- Microsoft LIT
- Conversion Engine
- CALIBRE
FB2
- MIME type
- application/x-fictionbook+xml
- Extension
- .fb2
- Container
- Single XML file (optionally zipped)
- MIME Type
- application/x-fictionbook+xml
- Category
- eBooks
- Full Name
- FictionBook
- Conversion Engine
- CALIBRE
- Extensions
- .fb2, .fb2.zip
- Standard
- FictionBook community spec (maintained on GitHub)
- Encoding
- UTF-8 (required)
| Specification | LIT | FB2 |
|---|---|---|
| MIME type | application/x-ms-reader | application/x-fictionbook+xml |
| Extension | .lit | .fb2 |
| Container | CHM-like (LZX-compressed OEBPS) | Single XML file (optionally zipped) |
| DRM | Microsoft Reader activation (servers offline since 2012) | — |
| Status | Retired | — |
| MIME Type | application/x-ms-reader | application/x-fictionbook+xml |
| Category | eBooks | eBooks |
| Full Name | Microsoft LIT | FictionBook |
| Conversion Engine | CALIBRE | CALIBRE |
| Extensions | — | .fb2, .fb2.zip |
| Standard | — | FictionBook community spec (maintained on GitHub) |
| Encoding | — | UTF-8 (required) |
LIT vs FB2 — Strengths and limitations
What each format does best, and where it falls short.
LIT Strengths
- Good rendering quality via ClearType in its era.
- Efficient compression via LZX.
- Small file sizes for text-heavy books.
Limitations
- DRM activation servers are permanently offline — DRM-protected purchases are dead weight.
- Proprietary format with no vendor successor.
- Zero modern reader support (Windows, macOS, iOS, Android).
FB2 Strengths
- Pure XML — trivial to parse, search, and transform.
- Single-file ebooks with inline images.
- Excellent on low-powered e-readers.
- De-facto standard in Russian-language ebook ecosystem.
- Simple structure makes conversion to any other format straightforward.
Limitations
- No styling, no custom fonts, no fixed layouts.
- Minimal Western-language tooling.
- Kindle and Apple Books do not support FB2 natively.
Quality & Compatibility
DRM-protected LIT files cannot be converted — KaijuConverter respects publisher encryption and returns an error rather than stripping protection. Unprotected or self-published LIT ebooks convert without restriction.
Tips for Best Results
- Use structure detection (TOC > chapters) to regenerate a clean table of contents in the FB2 if the LIT has none.
- Embedded fonts bloat file size — consider dropping them in Advanced if your reader uses its own typography anyway.
- For serialised fiction, keep cover art consistent across episodes by re-using one FB2 cover rather than auto-generating per LIT.
Frequently Asked Questions
Yes. The free tier accepts files up to 25 MB without registration, email capture or watermarks; paid plans go up to 2 GB. Paid plans raise the size cap, enable batch conversions and provide a REST API for automation, but nothing on the free tier is quality-limited — the output is exactly the same as on any paid plan.
Yes, provided the LIT itself has a well-formed ToC. Calibre reads the navigation structure and writes an equivalent ToC into the FB2. If the source lacks a ToC we can generate one from heading levels in Advanced → structure detection.
Uploads run over HTTPS, files are processed in isolated containers, and both the source LIT and the FB2 output are auto-deleted within two hours. No account is required, file contents are never logged, and KaijuConverter does not use uploads for AI training. The paid plan adds a signable data-processing agreement for regulated workflows.
No. KaijuConverter does not strip digital rights management. DRM-free LIT files — anything you authored yourself, public-domain classics, files from DRM-free retailers — convert without any restriction.
Most files finish in well under a minute. Small images and documents are typically ready in a few seconds; large video or audio files scale roughly with duration. Upload speed from your network is usually the dominant factor, not server time.
Yes. The cover is extracted from the LIT and re-embedded in the FB2 at device-appropriate dimensions. You can also override it in Advanced by uploading a custom cover image alongside the book file.
Microsoft LIT
Source formatLIT is a legacy Microsoft Reader eBook format, now obsolete.
FictionBook
Target formatFictionBook (FB2) is an XML-based eBook format popular in Russia and Eastern Europe. It provides structured semantic markup for fiction and non-fiction books.
Common Use Cases
Share across platforms
Send FB2 files to anyone without worrying about whether they have the right software for LIT.
Embed in documents
Drop FB2 output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
FB2 often produces smaller files than LIT for web, email and storage.
Archive & future-proof
Store in a widely-supported format that will still open on future operating systems without legacy plugins.
LIT vs FB2 — Typical file sizes
Approximate file sizes for common scenarios.
- Novel (text only) 200 KB - 1 MB
- Illustrated book 2-10 MB
- Novel (text only) 200-800 KB
- Novel with cover image 300 KB - 1.5 MB
- Illustrated children's book 5-30 MB
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Related comparisons
See these formats side by side to understand which fits your use case best.
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