CONVERT CBZ → TXTZ (CBZ to TXTZ)
Fast, secure CBZ to TXTZ conversion. No registration required.
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Studio Panel
Ghostscript + QPDFHOW TO CONVERT CBZ → TXTZ
Provide the CBZ
Select or drag your ebook up to 25 MB free (up to 2 GB with Kaiju Cloud). 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.
CBZ is an ebook-family format used for digital reading on e-readers and reading apps. That is why users land on this page looking for a TXTZ copy. Turning CBZ into TXTZ is how you unify a mixed ebook library: hand Calibre a folder of CBZ titles, get back a folder of TXTZ that your primary reader app indexes consistently. The per-book conversion is fast, and metadata (title, author, ISBN) is detected automatically. In practice CBZ is an ebook-family format used for digital reading on e-readers and reading apps. On the other end, TXTZ is an ebook-family format used for digital reading on e-readers and reading apps.
Why convert CBZ to TXTZ
TXTZ reflows correctly on the small e-ink screens; some CBZ files are fixed-layout PDFs or early-generation ePubs that do not resize gracefully. Converting fixes the reading experience on 6-inch screens.
CBZ vs TXTZ — Technical specifications
Side-by-side comparison of the technical details.
CBZ
- MIME type
- application/vnd.comicbook+zip
- Extension
- .cbz
- Container
- ZIP
- Siblings
- .cbr (RAR), .cb7 (7z), .cbt (TAR)
- Optional metadata
- ComicInfo.xml
- MIME Type
- application/vnd.comicbook+zip
- Category
- eBooks
- Full Name
- Comic Book Archive (ZIP)
- Conversion Engine
- CALIBRE
TXTZ
- MIME type
- application/x-txtz
- Extension
- .txtz
- Container
- ZIP + TXT
- MIME Type
- application/txtz
- Category
- eBooks
- Full Name
- TXTZ eBook
- Conversion Engine
- CALIBRE
- Tool
- Calibre
| Specification | CBZ | TXTZ |
|---|---|---|
| MIME type | application/vnd.comicbook+zip | application/x-txtz |
| Extension | .cbz | .txtz |
| Container | ZIP | ZIP + TXT |
| Siblings | .cbr (RAR), .cb7 (7z), .cbt (TAR) | — |
| Optional metadata | ComicInfo.xml | — |
| MIME Type | application/vnd.comicbook+zip | application/txtz |
| Category | eBooks | eBooks |
| Full Name | Comic Book Archive (ZIP) | TXTZ eBook |
| Conversion Engine | CALIBRE | CALIBRE |
| Tool | — | Calibre |
CBZ vs TXTZ — Strengths and limitations
What each format does best, and where it falls short.
CBZ Strengths
- Trivially simple — a ZIP of ordered images.
- Universal comic reader support since 2003.
- No DRM — archive-friendly, portable across devices.
- Small files thanks to JPEG/PNG compression of each page.
- Works on Kindle, Kobo, phones, tablets, desktops.
Limitations
- No standardized metadata (ComicInfo.xml is a convention, not required).
- Quality depends entirely on the source images.
- Relies on alphabetical filename order — inconsistent naming breaks reading order.
TXTZ Strengths
- Minimalist ebook wrapper.
- Plain-text core.
Limitations
- Niche.
- No reader adoption.
Quality & Compatibility
Cover images are re-embedded at the device-appropriate resolution, which may compress them more aggressively than the CBZ 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 CBZ 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 CBZ 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 CBZ 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 CBZ 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 CBZ 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.
Comic Book Archive (ZIP)
Source formatCBZ is a ZIP archive containing sequential comic book page images.
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.
Common Use Cases
Share across platforms
Send TXTZ files to anyone without worrying about whether they have the right software for CBZ.
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 CBZ 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.
CBZ vs TXTZ — Typical file sizes
Approximate file sizes for common scenarios.
- Single comic issue (24-32 pages) 20-80 MB
- Manga volume (200 pages) 80-250 MB
- Full story arc (multi-issue) 200 MB - 1 GB
- Novel (plain text) 200 KB - 1.5 MB
Need to Convert Gigabyte Archives or Mass Folders?
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Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
CBZ and CBR Format: The Complete Guide to Comic Book Archives
Everything about CBZ and CBR: structure, naming conventions, metadata XML, CBZ vs CBR vs CB7 vs PDF, best readers, and how to convert comic book archives.
Read guide →CBR and CBZ Files: Comic Book Archive Format Guide
Complete guide to CBR and CBZ comic book archive formats — RAR/ZIP structure, comic reader apps, creating CBZ files, CBR to CBZ conversion, PDF/EPUB...
Read guide →CBZ & CBR: Comic Book Archive Formats Explained
Complete guide to CBZ and CBR comic book archive formats — how they work, which readers support them, and how to convert CBR to CBZ or extract pages.
Read guide →
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