CONVERT
LIT → TXTZ
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Fast, secure LIT to TXTZ conversion. No registration required.
Setup: LIT is Microsoft Reader's legacy ebook format, discontinued since 2012. Goal: an interchangeable TXTZ. Converting LIT to TXTZ is about reader compatibility more than anything else. Kindle hardware speaks TXTZ but not LIT; Kobo reads TXTZ happily but stumbles on LIT; third-party apps vary. This tool bridges the gap without asking you to install and learn Calibre yourself. A quick refresher — LIT is Microsoft Reader's legacy ebook format, discontinued since 2012. By contrast, TXTZ is an ebook-family format used for digital reading on e-readers and reading apps.
Microsoft LIT
Source formatLIT is a legacy Microsoft Reader eBook format, now obsolete.
TXTZ eBook
Target formatTXTZ is a zipped plain text ebook format used by Calibre that packages a text file with optional metadata into a ZIP archive. It provides a lightweight ebook container when rich formatting is not required.
Why convert LIT to TXTZ
TXTZ reflows correctly on the small e-ink screens; some LIT files are fixed-layout PDFs or early-generation ePubs that do not resize gracefully. Converting fixes the reading experience on 6-inch screens.
HOW TO CONVERT
LIT → TXTZ
Provide the LIT
Select or drag your ebook up to 100 MB. No account or library sign-in is required.
Run Calibre
Our pipeline runs the same Calibre command that powers desktop conversions, with device-appropriate defaults.
Retrieve the TXTZ
A download link appears when conversion completes. Metadata is preserved inside the TXTZ for library indexing.
Common Use Cases
Share across platforms
Send TXTZ files to anyone without worrying about whether they have the right software for LIT.
Embed in documents
Drop TXTZ output into Word, Google Docs, PowerPoint, Notion or a website without conversion warnings.
Optimize size
TXTZ 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 TXTZ — 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).
TXTZ Strengths
- Minimalist ebook wrapper.
- Plain-text core.
Limitations
- Niche.
- No reader adoption.
LIT vs TXTZ — 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
TXTZ
- MIME type
- application/x-txtz
- Extension
- .txtz
- Container
- ZIP + TXT
- Tool
- Calibre
| Specification | LIT | TXTZ |
|---|---|---|
| MIME type | application/x-ms-reader | application/x-txtz |
| Extension | .lit | .txtz |
| Container | CHM-like (LZX-compressed OEBPS) | ZIP + TXT |
| DRM | Microsoft Reader activation (servers offline since 2012) | — |
| Status | Retired | — |
| Tool | — | Calibre |
LIT vs TXTZ — Typical file sizes
Approximate file sizes for common scenarios.
LIT
- Novel (text only) 200 KB - 1 MB
- Illustrated book 2-10 MB
TXTZ
- Novel (plain text) 200 KB - 1.5 MB
Quality & Compatibility
Cover images are re-embedded at the device-appropriate resolution, which may compress them more aggressively than the LIT did. If you need pixel-perfect covers, override the cover image in Advanced to skip the re-encode.
Tips for Best Results
- Always keep the LIT original until you have verified the TXTZ on the destination device — screenshots in a browser can look fine while e-ink rendering differs.
- For large libraries, batch-convert via a single ZIP upload; the job processes each ebook individually and returns a combined archive.
- Set the output profile (Kindle, Kobo, generic) in Advanced — defaults are sensible but a device-specific profile yields better reflow.
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 TXTZ. 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 TXTZ 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 TXTZ at device-appropriate dimensions. You can also override it in Advanced by uploading a custom cover image alongside the book file.
Related comparisons
See these formats side by side to understand which fits your use case best.
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Read guideSecure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.