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Comic Book RAR (CBR) to EPUB converter

CBR → EPUB gets a RAR comic onto readers that know EPUB but not RAR, without shrinking or recompressing the scans on the way.

  • Converted with Image engine · input deleted within 24 h
  • Free: 5 conversions a day · 5 MB each
  • Higher limits →

From real runs

What you get — and what changes

  • RAR4 and RAR5 Kept

    Planet Comics #35 (RAR4) and Timmy Toodles (RAR5) both became valid EPUBs; EPUBCheck 5.2.1 found nothing to report in either.

  • Scans Kept

    The 52 Planet Comics JPEGs and the 28 Timmy Toodles PNGs sit in the EPUB exactly as they were in the RAR.

  • Reading order Kept

    Pages follow the numbers in their names, so the out-of-order Terrors of the Jungle #21 archive still opens on its cover.

  • Fixed layout Kept

    Each page has its own viewport matching its pixel size, so wide covers and narrow inside pages both fill the screen without cropping.

  • Page size on small screens Changed

    Full-resolution scans are kept, so a 2305 × 3246 PNG page is much larger than an e-reader screen and pages may turn more slowly on older devices.

  • Encrypted archives Lost

    A password-protected RAR cannot be opened, so there is nothing to put in the EPUB; the conversion stops with a message.

Sample conversions

RAR4 issue

Input
Planet Comics #35, an 18,571,883-byte RAR4 .cbr of 52 JPEG pages.
Output
19,461,875-byte EPUB in 0.8 s, cover marked, no EPUBCheck errors.

RAR5 picture book

Input
The Travels of Timmy Toodles, a 36,845,574-byte RAR5 .cbr of 28 PNG pages.
Output
40,125,517-byte EPUB in 1.4 s; PNGs stored as they were, so it is larger than the RAR.

A real Comic Book RAR (CBR) → EPUB run

We converted our Comic Book RAR (CBR) sample (4.9 MB) with Image engine on 2026-10-20. It took 139 ms and produced a 4.9 MB EPUB file, about the same size as the input. The engine raised no warnings.

Input · sample.cbr · 4.9 MB

5,092,885 bytes

Output · sample.epub · 4.9 MB

EPUB 3.0: 8 content documents, 7 images, EPUB 3 nav, cover set, title “sample”

Version
3.0
Content documents
8
Images
7
Table of contents
EPUB 3 nav
Cover
cover set
Title
sample

Options and when to change them

quality
Only affects WebP pages, which are saved as JPEG; JPEG and PNG scans are never recompressed.

Do it yourself

calibre

bash
ebook-convert comic.cbr comic.epub

Debian's calibre 6.13 package could not open CBR at all because its RAR module is missing; calibre's own installer includes it.

Comic Book RAR (CBR) to EPUB by API or MCP

The HTTP API and the MCP server run the exact engine this page uses (Image engine); the response carries the same warnings the web converter shows. Check support first with GET /api/v1/pairs?from=cbr&to=epub.

curl
curl -X POST https://filetypeconverters.com/api/v1/convert \
  -H "Authorization: Bearer $FTC_API_KEY" \
  -F "file=@input.cbr" -F "from=cbr" -F "to=epub" \
  --output output.epub
API reference

When this is the wrong conversion

  • If the target app reads CBZ, CBR → CBZ is a lighter change that keeps the comic a comic archive.
  • If you need a file to print or share with anyone, CBR → PDF opens in more places than EPUB.

Comic Book RAR (CBR) to EPUB questions

Why is the EPUB bigger than my CBR?

RAR compresses PNG pages harder than the ZIP container inside an EPUB. JPEG comics stay about the same size; the PNG picture book grew from 36.8 MB to 40.1 MB.

Does it handle RAR5 comics?

Yes. Our RAR5 sample converted in 1.4 s. What it cannot handle is encryption or a split set of .part files.

Can the EPUB read right to left for manga?

Yes, when the archive's ComicInfo.xml marks it as Manga YesAndRightToLeft. Without that file there is no way to tell, and pages run left to right.

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