Free Online CBR & CBZ Viewer
Open, read, and sanitize CBR and CBZ comic archives privately in your browser. Single-page, two-page spreads, manga RTL mode, bookmarks, and no server uploads.
Drop your CBR or CBZ file here
or choose a comic archive from your device
See an example before choosing your own file.
How to open a CBR or CBZ file online
No registration and no installation required. FileViewerHub processes supported CBR or CBZ files locally in your browser.
Drop your comic file
Drag and drop your .cbr or .cbz comic archive into the upload zone, or click to choose from your device.
Start reading instantly
FileViewerHub decompresses the archive locally in WebAssembly, orders pages sequentially, and renders the comic in browser memory.
Customize view or sanitize
Switch between single-page or two-page spreads, toggle Manga RTL mode, bookmark pages, zoom, or sanitize the archive into a clean CBZ.
What is a CBR or CBZ comic archive?
CBR (Comic Book RAR) and CBZ (Comic Book ZIP) are archive containers designed specifically for bundling sequential comic book and manga page images into a single convenient file.
Rather than manually extracting dozens of individual JPEG, PNG, or WebP images into a folder, comic readers inspect the internal structure, sort filenames in natural alphanumeric sequence, and present them in a seamless reading view.
FileViewerHub decompresses and renders these archives locally in your browser memory using WebAssembly. Your comics never leave your device, ensuring maximum speed and complete privacy.
Powerful Client-Side Comic Reader Tools
FileViewerHub processes your comic book archives inside your browser for instant viewing, reading customization, and archive sanitization without compromising your privacy.
In-Browser RAR & ZIP Extraction
Avoid installing heavy desktop comic viewers or unarchiving tools. Our client-side WebAssembly engine decompresses .cbr (RAR) and .cbz (ZIP) files directly in your browser, enabling instant previewing on any device in milliseconds.
Spreads, Manga & RTL Reading
Read your comics the way they were meant to be enjoyed. Switch between single-page and two-page spreads with smart cover alignment, enable Manga RTL mode for authentic Japanese comic reading, and zoom smoothly on high-resolution panels.
Safe Local CBZ Sanitization
Clean and optimize comic archives with a single click. Strip executables, scripts, nested archives, directory traversal paths, and OS junk files while preserving visual page quality in a standardized, universally compatible CBZ archive.
What you can view inside a CBR / CBZ file
FileViewerHub renders browser-compatible raster page images in bounded memory. Non-image entries or unsupported formats are safely bypassed.
CBR vs CBZ: What's the Difference?
| Property | CBR | CBZ |
|---|---|---|
| Container format | RAR (.rar container) | ZIP (.zip container) |
| File extension | .cbr | .cbz |
| Typical contents | Sequential comic page images | Sequential comic page images |
| Universal compatibility | Requires RAR decompression | Native ZIP support everywhere |
| Sanitized output | CBZ (ZIP format) | CBZ (ZIP format) |
The sanitizer always outputs CBZ because creating RAR archives in the browser is not practical. ZIP is the standard container for CBZ and is universally compatible. CBR and CBZ use different compression algorithms internally - they are not identical formats, even though both serve the same purpose of bundling comic page images.
Sanitize a CBR or CBZ Comic Archive
The sanitizer creates a new CBZ containing validated comic page images and, when selected, safely reconstructed comic metadata. It removes archive entries that are not needed for reading, including unsupported files, unsafe paths, and common system files.
This is structural archive sanitization, not antivirus scanning, and it does not guarantee that an image file is free from every possible security issue.
What gets removed during sanitization
Page image quality
Page images are kept without re-encoding where possible. This preserves their original visual quality. However, embedded metadata inside the page images themselves (such as EXIF or IPTC data) is not removed by the structural sanitizer.
What Is ComicInfo.xml?
Some comic archives include an optional XML metadata file named ComicInfo.xml. It provides structured bibliographic details such as comic title, series name, issue number, creator credits (writer, penciller, inker, colorist), publisher, language, page count, and reading direction.
When ComicInfo.xml is present and indicates right-to-left or manga orientation, FileViewerHub automatically configures Manga RTL mode for a tailored reading experience. The reader works seamlessly with or without metadata present.
Open CBR and CBZ files without dedicated desktop software
You do not need to install heavy desktop comic viewers like Calibre or CDisplayEx just to inspect or read a comic file. FileViewerHub operates entirely in your web browser, making it functional across Windows, macOS, Linux, Chromebooks, iPads, and mobile phones.
This is ideal for quickly reading comic issues, verifying downloaded archives, or sanitizing files before transferring them to e-readers.
What programs open CBR and CBZ files?
Several established comic readers can open CBR and CBZ files across various operating systems:
FileViewerHub is a browser-based file reading tool and is not a full replacement for desktop comic library management software.
Is It Safe to Open Comic Archives Online?
Comic book archives can sometimes contain unwanted extra files, scripts, or bloated assets. FileViewerHub runs entirely client-side in browser sandbox memory. Your comic files, passwords, reading progress, and page images never leave your computer and are never uploaded to our servers.
Comic archive contents, page images, passwords, and reading progress never leave your browser. Only anonymised telemetry (such as viewer type and file size bucket) may be collected.
View a sample CBR or CBZ file
sample-comic.cbz
Not sure what you'll see? Open our safe sample comic archive file as an example to preview how the reader displays pages, spreads, and controls.
Frequently asked questions
What is a CBR file?
What is a CBZ file?
What is the difference between CBR and CBZ?
Can I open CBR files without installing a comic reader?
Can I read manga right to left?
Does FileViewerHub remember where I stopped reading?
Where are my bookmarks stored?
What does the CBR/CBZ sanitizer remove?
Why does a sanitized CBR download as CBZ?
Does sanitizing a comic reduce image quality?
Can FileViewerHub open password-protected CBR or CBZ files?
Why are some pages missing or unsupported?
Ready to view your file?
Open a CBR or CBZ file in your browser, choose your reading layout, and sanitize the archive when needed.