Fix a CBZ or CBR that will not open
Start by doubting the diagnosis. The large majority of comic archives people report as corrupted are intact: the app simply cannot read the container. A CBR is a RAR, and RAR is proprietary and missing from most systems, so a perfectly good CBR produces an error that reads like damage. Rename it to .rar or .zip and try your archive tool before assuming the worst.
↑ Upload and configure in our Studio
When a file genuinely is damaged, usually truncated by an interrupted download or left with a broken index, the pages inside are often still readable even though the archive as a whole is not. Drop it in here and the archive is unpacked page by page and whatever reads is rebuilt into a clean new CBZ, EPUB or PDF. You get a working file containing the pages that survived, which is the realistic best outcome and more than most readers manage with the original.
- Files auto-delete after 24 hours
- No install, runs in any browser
- Free to use
- The genuine open-source KCC engine
How to rebuild a broken comic file
Check the obvious first
Rename the extension to .zip for a CBZ or .rar for a CBR and open it with your own archive tool. If the pages are there, the file was never damaged and the app was the problem.
Drop it in
The archive is unpacked here and read page by page. A broken index or a truncated tail does not stop the pages that are intact from being read.
See what survived
A live preview shows the pages that came out, so you can count them against what the volume should have and judge whether the result is worth keeping.
Download the clean file
The rebuilt file is a fresh archive with a correct index, so it opens normally from then on. Files auto-delete after 24 hours.
Corrupt is usually the wrong word
An app that cannot read a container often reports damage rather than admitting the format is unsupported, and CBR gets this constantly because of RAR. Before trying to recover anything, confirm the file is actually broken by opening it as a plain archive.
A rebuilt file stays fixed
The output is a newly written archive with a correct index, so whatever was wrong structurally is gone rather than worked around. Keep the rebuilt copy for reading and the original only if you want to attempt a better recovery later.
Frequently asked questions
Can you repair the original file?
No, and nothing honestly can. There is no repair step here and no integrity report. What happens is that the readable pages are extracted and written into a new, clean file. That fixes a broken index or a truncated archive in effect, because the output is built fresh, but it cannot invent data that is not in the file.
Will I get all my pages back?
You get the pages that are readable. If a download stopped at 80 percent, roughly the last fifth is simply not in the file and no tool can recover it: the result will be short and the preview will show you by how much. If the file was whole and only its index was broken, you should get everything.
My reader says the CBR is corrupt but it opens elsewhere. Why?
Because the reader has no RAR support and reports that as a damaged file, which is a misleading error message rather than a fact about your file. Converting it to CBZ removes the cause: ZIP is read everywhere, so the same pages stop producing the error.
What causes a comic archive to break?
Interrupted downloads are the common one, leaving a truncated file. After that: a copy that failed part way, storage errors, and archives written badly by a tool that produced an index not matching the contents. The last kind usually recovers completely, because all the pages are present.
Is it safe to upload a file I think is broken?
Yes. Your original is read, never modified, and converted output auto-deletes after 24 hours. If the rebuild comes out short, you still have the file you started with.
The unpacking and page rebuild run on Kindle Comic Converter (KCC), the open-source engine comic readers have trusted for years, hosted here so there is nothing to install.
Free, no install, see which pages survived before you download