How to compress files directly on-kindle (.zip) ?

HenriHenry · 09-07-2026, 01:50 PM

I have a kindle PW6 (jailbroken) and wish to compress folders to .zip on my kindle.
I would like to know if there is a way to do so on-device without a bothersome copy-zip-replace with a computer.
I have not seen such feature in kterm nor the micropython kindle port.
Any help would be appreciated.
Thanks in advance,
HenriHenry

DNSB · 09-07-2026, 03:14 PM

You could try gzip/gunzip in the /bin directory (those are symlinks to the executables) or bzip2 in the /usr/bin directory which does not create .zip files but .bz2 offers higher compression that .zip in most cases.

HenriHenry · Yesterday, 10:09 AM

I just tested gzip and it works, thanks !
However, one of the reasons I was so adamant about the ouptut being a .zip was so that I could use it in KOReader (a zipped folder of images can be read by KOReader as a single book), but .gz files are not supported.
At least, now I can compress files on-kindle, which is nice (I'll try bzip2 as well).
Thanks again,
HenriHenry

09-07-2026, 01:50 PM	#1
HenriHenry Dreamer Posts: 40 Karma: 16 Join Date: Jun 2025 Device: Kindle PW6	How to compress files directly on-kindle (.zip) ? I have a kindle PW6 (jailbroken) and wish to compress folders to .zip on my kindle. I would like to know if there is a way to do so on-device without a bothersome copy-zip-replace with a computer. I have not seen such feature in kterm nor the micropython kindle port. Any help would be appreciated. Thanks in advance, HenriHenry

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09-07-2026, 03:14 PM	#2
DNSB Bibliophagist Posts: 54,318 Karma: 182161621 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	You could try gzip/gunzip in the /bin directory (those are symlinks to the executables) or bzip2 in the /usr/bin directory which does not create .zip files but .bz2 offers higher compression that .zip in most cases.

Yesterday, 10:09 AM	#3
HenriHenry Dreamer Posts: 40 Karma: 16 Join Date: Jun 2025 Device: Kindle PW6	I just tested gzip and it works, thanks ! However, one of the reasons I was so adamant about the ouptut being a .zip was so that I could use it in KOReader (a zipped folder of images can be read by KOReader as a single book), but .gz files are not supported. At least, now I can compress files on-kindle, which is nice (I'll try bzip2 as well). Thanks again, HenriHenry

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