frontpage.
newsnewestaskshowjobs

Open Source @Github

fp.

Open in hackernews

KOReader

https://koreader.rocks/
127•Cider9986•1h ago

Comments

Cider9986•58m ago
You can use the regular Kindle viewer once you jailbroke your kindle, but KOReader has native epub and pdf support so you don't have to use a converter when uploading your books.

I did find it hard to get the bezels to be even and it still doesn't always format well depending on the book. I still kind of prefer the default viewer.

I use this plugin in KOReader which lets you download books from Z-Library within KOReader.

https://github.com/ZlibraryKO/zlibrary.koplugin

Another cool thing is you can use custom fonts and dictionaries. I use the OED short version and the Wikipedia one. There's built in ones that it can download but pirated ones like OED you have to upload yourself.

Unfortunately on MacOS it seems you have to use Amazon's app to access the filesystem.

Edit: I think they changed it on the newer Kindle which I have.

simonklitj•51m ago
> Unfortunately on MacOS it seems you have to use Amazon's app to access the filesystem.

KOReader comes with SSH, so you can just SSH into it.

occz•46m ago
>Unfortunately on MacOS it seems you have to use Amazon's app to access the filesystem.

I can recommend using a Filebrowser plugin for KOReader, that way you can access the file system over a web interface and upload that way. No cables needed or anything, quite convenient.

nonninz•19m ago
> Unfortunately on MacOS it seems you have to use Amazon's app to access the filesystem.

Hmmm not really my experience, unless it's a new thing. I am still able to access it via finder. Although I need to exit KoReader first and go back to the stock UI.

dmos62•53m ago
Use it both on my phone and on an eink Android tablet. Love it, especially the dark mode.
jgtrosh•37m ago
I wish you could disable fullscreen (enable the navigation bar) on Android though :-(
simonklitj•51m ago
KOReader is my jam! With its reflow for PDFs, I've used it on my Kindle Oasis 2 to read everything for my undergrad and graduate degree. Some years ago now, I wrote a script that converts the annotations to Obsidian [0], and then another little script to automatically keep my "Articles" folders in sync between the Kindle and my laptop.

Very grateful for this software!

[0]: https://github.com/simonpacis/kohico

adamas•50m ago
I have it on my Kobo, it's really good ! I use it with Wallabag, I can save articles on my desktop and sync it before leaving for work, really nice.
carlosjobim•50m ago
My wish is to see ebooks become first class citizens on all digital devices. Apple has a native ebook reader built in to their devices. It's cumbersome and bloated, but it's there. No web browser except Yandex has built in ebook support, even though it would be the easiest thing in the world. Android, Linux and Windows have no built-in ebook reader, as far as I know.

Murasaki [1] is the most performant and sleek ebook reader you can get for MacOS currently. It's magnificent, but the creator has regionally limited who can get it, unfortunately.

[1] https://genjiapp.com/mac/murasaki/index_en.html

WillAdams•39m ago
The old Microsoft Edge had epub support, and even a nascent ebook shop and a nifty note-taking/annotation mechanism (there was even a restitution payment made for folks who had taken notes), but Microsoft gave up on it when they shifted to a rebadged Chrome.
Lord-Jobo•34m ago
It doesn’t seem like it’s a huge ask imo, and I’m also pretty surprised that they have such limited support, a mostly text format like epub really should be simple to add functionality for.

Less surprising but still annoying is how many hoops you need to jump through to get a good reading experience for manga, particularly on macOS. I had to try many options that were either too buggy, too difficult to install correctly, various aggressive paywalls, or straight up don’t function with high quality scans.

Eventually I landed on one(will edit the name in when I have access to my laptop) that functions well but has some memory issues in importing books, possibly a memory leak.

Maybe I’ve just become shit at finding apps in the modern unsearchable age, but it really feels like reading of all types has diminished enough that we are an unserviceable market.

overflowy
starvar2•48m ago
I installed it on my Kobo to have the syncing from Calibre. Works perfectly, no complaints.
lolgab•44m ago
I installed it on my Amazon Kindle and I couldn't be happier. It shows once again that free software is superior to proprietary software. Free software grows slowly to make users happier and not to attract them with useless features to extract more value from them. Congratulations for this great piece of software.
kelvinjps10•38m ago
What extra features has over regular kindle software? I find kindle features enough but I want to know if I’m missing something
kelvinjps10•37m ago
Well tbh the reason I like it has to do more with calibre (free software)
4thguy•32m ago
Being able to put epubs bought elsewhere and reading them without needing to convert the files is a huge plus
maccard•25m ago
Where do you buy your epubs from?
Cider9986•12m ago
I wouldn't assume that purchases are taking place.
rahimnathwani
HelloUsername•41m ago
Previous discussions:

31-mar-2025 https://news.ycombinator.com/item?id=43539103 106 comments

10-apr-2024 https://news.ycombinator.com/item?id=39996947 33 comments

jbirnick•41m ago
I absolutely love KOReader on my Boox Go 10.3!

It has super useful features like the semi-auto-cropping which removes margins in PDFs (like papers or books), including unnecessary things like page numbers or similar, so that you can really maximize the size of the core content. It also has a nice chapter overview and other useful things!

Truly one of the best pieces of software I have used so far.

timvdalen•39m ago
See also this discussion from earlier today, which might have prompted this submission: https://news.ycombinator.com/item?id=49094189
mlue-the-one•37m ago
The PDF support is just the right thing to have.
spiresofagartha•33m ago
It seems there's a native dictionary. How does it fare?
Cider9986•9m ago
Good. You can install your own or download the free ones from settings.

It also searches Wikipedia.

dtj1123•29m ago
It really does rock.
utopiah•28m ago
FWIW not only it is in itself nice but it evens has plugin system. Consider extending it and sharing back with the community!
radel•19m ago
It took me some time to know my way around it, but wow. I have it configured with some plugins, like zen ui and bookshelf. I Also use BookOrbit to sync reading progress and annotations between devices. Loving it.
koojh•19m ago
KOREA!
khalic•18m ago
I tried but they whole process is a miserable experience between the stale blog posts and the dead links…

And then the UX… great project but could use a systems guy used to jailbreaking installations and a UX designer

Cider9986•10m ago
you used https://kindlemodding.org/?

Worked fine for me.

pesarkhobeee•17m ago
I am using koreader on my ereader and KOreader has a native support for https://wallabag.org/. They are both fantastic opensource projects, whenever I like to read a blog post I am sending them to my wallabag and therefore I can easily have them on my ereader too.

Also the fact that you can install different plugin on KOreader and customize it in a way you like is fantastic. for example just check:

- https://github.com/doctorhetfield-cmd/simpleui.koplugin - https://github.com/AndyHazz/bookshelf.koplugin

Or with Lua you can develop your own plugin for that. to people who wanted to jailbreak their Kindle I can recommend these two links:

- https://kindlemodding.org/ - https://www.youtube.com/watch?v=Qtk7ERwlIAk

All in all I am supper happy with KOreader and can't imagine to use anything else

sieve•15m ago
I installed this the moment I got my Kobo Libra H2O. Mostly read fiction from the 1800s and early 1900s and I did not want to fight whatever proprietary software the reader came with (Kobo is probably better than the Kindle for this, but I never tried it!)

I have a problem with epubs though. This need to support every single thing under the sun makes the pipeline exceedingly complex. All you need for a vast majority of fiction is:

- headings

- paras

- emphasis (bold/italic)

- block quotes

Add simple "image" syntax to it to display maps etc from detective stories

Basically a ruthlessly cut down version of markdown.

The mini-readers from Xteink came in at the right time for such experimentation.

Cider9986•8m ago
If you use a Kindle, you have to jailbreak it first before installing it. There's definitely been some improvements with user experience at least with apps since I first jailbroke it. There's like an appstore with games and KOReader that I use.

This is the guide I used and it's up to date.

https://kindlemodding.org/

•
25m ago
I really appreciate you mentioning Murasaki - thank you. I've been looking for something like this for a long time, because every single EPUB "reader" out there does so much more than just read EPUBs. This one does just that, I love it.
•
31m ago
IMO the most important one is more options for PDF rendering, often allowing you to read PDFs without squinting.
vouaobrasil•29m ago
Never updating if you don't want an update. I see no reason for my e-reader to have updates. I have a Kobo and after I updated it once about 5 years ago I haven't since because it already does everything I need it to.
nonninz•22m ago
As someone who thought the same (stock was enough for me) until I had some free time and switched, here are some things I'm really enjoying, in no particular order:

- Format support: EPUB, CBR/CBZ (comics, graphic novels), PDF

- Dark mode

- Fully programmable gestures and shortcuts

- Automatically syncs with my readeck instance (think readitlater/instapaper) to dowload the articles I save for example here on HN

- Calibre integration over wifi

- RSS/Atom

If you are into manga, there is an extension for directly downloading them on the device

I'm really happy I made the switch. - Custom dictionaries

teroshan•37m ago
Not only is it the superior piece of software, the freedom it offers by dissociating the choice of hardware from the choice of software is another example why free software and interoperability is something we should strive for.
gchamonlive•34m ago
I think the only proprietary software companies with any shot at longevity are Japanese companies. First Japan leads by far the ranking of oldest companies in the world (https://en.wikipedia.org/wiki/List_of_oldest_companies). Then we have actual software like Zelda Breath of the Wild which is a technical marvel comparable to the original Rollercoaster Tycoon considering how well it runs on the severely limited architecture of the Switch.

I think this boils down to profit not being the only driving force for these companies, but prestige and a sense of duty and responsibility towards something larger and less immediate.

nargek•29m ago
Software

Software Japan

Cyph0n•5m ago
There is nothing inherently special about Japan or Japanese people. You can pull similar examples from many other countries.
Kirth•2m ago
I take it you've never been to Japan...

Wouldn't wanna live there permanently. Wouldn't want to have been born Japanese. But my god the products and services are head and shoulders above my baseline expectations; it's simply nicer.

gchamonlive•1m ago
[delayed]
hs86•26m ago
I like the Readwise integration via plugin and the EPUB support, but for the first few days with it, I was busy understanding the menu hierarchy and trying to figure out how to match the styling and spacing of my native Kindle books. The out-of-the-box experience is unfortunately just "tasteless," and I needed some time to warm up to it.
thewhitetulip•19m ago
It shows reading stats that I absolutely love!!
lordleft•16m ago
I’m a heavy KOReader user and absolutely adore it, but I think it definitely trades user-friendliness for power and flexibility. The Kindle proprietary store has a far more user friendly UI imo, though it’s getting progressively worse (and the fact that kindles now default to showing you the store pisses me off to no end). KOReader plugins really close the gap though.
hashworks•2m ago
Funnily koreader comes with a lot of features that are useless to me, but I love that I can just disable the respective plugins.

KOReader

https://koreader.rocks/
130•Cider9986•1h ago•48 comments

Document-borne AI worms can self-propagate through Copilot for Word

https://enklypesalt.com/posts/context-collapse-part3-ai-worming-through-word/
76•Canopy9560•1h ago•50 comments

More Tailscale tricks for your jailbroken Kindle

https://tailscale.com/blog/jailbroken-kindle-proxy-tun-modes
265•Error6571•7h ago•91 comments

SpecForge – A Platform for Authoring Formal Specifications

https://docs.imiron.io/v/0.5.10/en/tour.html
35•agnishom•2h ago•1 comments

Amiga Graphics Archive

https://amiga.lychesis.net/index.html
48•Bluestein•2h ago•9 comments

User Interfaces of the Demo Scene

https://www.datagubbe.se/scenegui/
270•zdw•8h ago•41 comments

SQLite in Production: Optimizing WAL Mode, Concurrency, and VFS Layers

https://micrologics.org/blog/sqlite-in-production-optimizing-wal-mode-concurrency-and-vfs-layers-...
117•ankitg12•5h ago•45 comments

Lisp moving Forth moving Lisp

https://letoverlambda.com/textmode.cl/guest/chap8.html
54•fallat•2d ago•18 comments

Codex Security

https://github.com/openai/codex-security
535•bakigul•16h ago•192 comments

Ancient Rome's version of Google Maps: how long to reach the beach

https://www.euronews.com/culture/2026/07/02/ancient-romes-version-of-google-maps-how-long-to-reac...
38•gnabgib•6d ago•28 comments

French musician Kavinsky found dead

https://www.euronews.com/culture/2026/07/29/dj-kavinsky-known-for-his-track-nightcall-found-dead-...
56•bristleworm•1h ago•7 comments

Show HN: I was tired of opening 2 tabs for every HN link, so I made a userscript

https://github.com/twalichiewicz/HNewhere
348•twalichiewicz•14h ago•100 comments

Substack writers, you need a website

https://elizabethtai.com/2026/06/10/substack-writers-you-need-a-website/
581•speckx•19h ago•308 comments

Half-Life ported to Mac OS 9

https://mac-classic.com/news/half-life-ported-to-mac-os-9/
274•freediver•15h ago•127 comments

Show HN: Vimgolf.ai – Learn Vim by playing through a map of levels

https://vimgolf.ai
18•nickandbro•3h ago•16 comments

Kimi K3 Architecture Overview and Notes

https://sebastianraschka.com/blog/2026/kimi-k3-architecture-notes.html
468•ModelForge•21h ago•100 comments

Cracking Windows Open: Porting RADV to Win32

https://www.collabora.com/news-and-blog/news-and-events/cracking-windows-open-porting-radv-to-win...
63•zdw•8h ago•21 comments

ReFrame – The EPaper Camera

https://reframe.camera/
163•phil294•13h ago•37 comments

Steel Bank Common Lisp version 2.6.7

https://sbcl.org/all-news.html?2.6.7
248•tmtvl•19h ago•114 comments

LearnVector – Andrew Ng's AI company building one‑to‑one learning experiences

https://learnvector.ai/
223•ajhai•11h ago•141 comments

Transformer Transformer: A Unified Model for Motion-Conditioned Robot Co-Design

https://transformer-transformer.github.io/
65•ilreb•9h ago•7 comments

Delayed Gratification – Proud to Be 'Last to Breaking News'

https://www.slow-journalism.com/
313•speerer•21h ago•183 comments

Hubble: Open-source notetaking app for you and your agents

https://www.hubble.md/
127•handfuloflight•12h ago•58 comments

Teach yourself programming in ten years (1998)

https://www.norvig.com/21-days.html
171•vinhnx•3d ago•102 comments

Una GPS smart watch – Repairable, USB-C charging, developer-friendly

https://unawatch.com/
246•pimterry•22h ago•155 comments

60 Years Ago, a Submerged Submarine Circled the Globe for the First Time (2020)

https://www.popularmechanics.com/military/weapons/a32009109/operation-sandblast-sumbarine-circumn...
29•baud147258•1d ago•11 comments

Hooray for the Sockets Interface

https://blog.apnic.net/2026/07/28/hooray-for-the-sockets-interface/
48•jruohonen•10h ago•29 comments

The iPhone Upgrade Program is being replaced by Apple Upgrade

https://www.apple.com/shop/iphone/iphone-upgrade-program
193•lkurtz•19h ago•345 comments

Zig's Incremental Compilation Internals

https://mlugg.co.uk/posts/incremental-compilation-internals/
258•garyhtou•21h ago•188 comments

Now is the time to give LLMs access to the ACM digital library

https://cacm.acm.org/opinion/now-is-the-time-to-give-llms-access-to-the-acm-digital-library/
180•rbanffy•21h ago•149 comments