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What's new in KOReader (github version) v2026.03

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There's a pretty big update on desktop this time around. We've upgraded from SDL2 to SDL3 (#14983). This should mean everything works the same or better, but let us know if we missed some edge case. For the nearby future it does have the side effect of always shipping along SDL3, even in the DEB packages, because only recent distros provide it out of the box.

There are many other improvements, like stable pages in file browser (#14570). I won't bore you with more nonsense (read: there were some holdups with the release and my mental overview was lost), and I'll just let the PRs speak for themselves.

This month's logo was contributed by @Sonnenfee

We'd like to thank all contributors for their efforts. Some highlights since the previous release include:

Fix two bugs with statusbar presets (#14556) @loeffner
Exporter: use number of stable pages (#14554) @hius07
newsdownloader: multiple unwanted selectors (#14545) @phoffmeister
Screensaver: skip showing without UI instance (#14561) @hius07
Gestures/profiles: allow disabling popup messages (#14543) @hius07
Status bar: fix loading preset on empty items (#14567) @hius07
misc/remarkable: enable full refresh by default for appload-based setup (#14575) @NoaHimesaka1873
feat/remarkable: support refresh levels (#14576) @NoaHimesaka1873
Stable pages in file browser (#14570) @hius07
Exporter: Enhanced title and author parsing from MyClippings (#14578) @den-is
feat: add japanese reader.dict monolingual dictionary (#14579) @BoboTiG
Calibre: do not use stale list (#14585) @hius07
Fix crash on Kindle when both AutoSuspend and KeepAlive are on (#14594) @DemonicSavage
Pinned page exact location (#14580) @hius07
Stable pages in file browser 2 (#14592) @hius07
Fix Kindle crash on AutoSuspend while charging (#14604) @DemonicSavage
android: fix possible run target error (#14608) @benoit-pierre
renderimage: improve JPEG handling (#14505) @benoit-pierre
Status bar: 'External content' item (#14601) @hius07
bump base (#14619, #14633, #14662, #14738) @benoit-pierre
Several important dependencies.
Optimize doc_pages (#14614) @hius07
android: allow calling Device:hasColorScreen() in a fork (#14628) @benoit-pierre
tools/logcat: improve handling of input encoding (#14629) @benoit-pierre
Exporter: Correct MyClipping Page value parsing (#14583) @den-is
SSH: add top menu checkbox (#14631) @hius07
TouchMenu: fix menu height with/without separators (#14627) @hius07
Exporter: fix export My Clippings (#14636) @hius07
Profiles: auto-exec menu wordings (#14641) @hius07
Stable pages in alt status bar (#14638) @hius07
Show next locations in Book map and Page browser (#14643) @hius07
Status bar: use screen pages for "time left in chapter" (#14651) @hius07
build(deps): bump actions/checkout from 5 to 6 by @dependabot[bot] in #14658
[plugin] NewsDownloader: support content:encoded with attributes (#14660) @Frenzie
NewsDownloader: fix missing feed_config.lua options (#14396) @nuxa17
platform: remove leftovers from old install on update (#14637) @benoit-pierre
progressbardialog: improvements (#14513) @benoit-pierre
newsdownloader - new feature: continue processing feed on download error (#14650) @MrToph
ReaderScrolling: Radio buttons for scrolling options (#14647) @jonnyl2
Bump luajit-launcher to 75e7eaf (#14672) @hanakomisa
android: drop no longer working make target (#14673) @benoit-pierre
[Dispatcher] NT: add hidden flows toggle to dispatcher (#14682) @Commodore64user
Style tweaks, Menu, TextBoxWidget: various small fixes (#14698) @poire-z
bump base: thirdparty updates, crengine fixes (#14701) @poire-z
TextViewer: pin page (#14668) @hius07
Sleep screen: fix unlocking (#14689) @hius07
Sleep screen: improve 'Exit sleep screen' message (#14691) @hius07
KoptInterface: prevent crash when word is nil 2 (#14705) @hius07
CloudStorage: fix onClose (#14711) @hius07
doc: fix and improve build requirements (#14713) @benoit-pierre
appimage: fix possible issue with the appimagetool binary (#14717) @benoit-pierre
kindle / pocketbook / remarkable: detect if launcher script changed (#14719) @benoit-pierre
build(deps): bump actions/upload-artifact from 5 to 6 by @dependabot[bot] in #14726
build(deps): bump actions/cache from 4 to 5 by @dependabot[bot] in #14727
Decode Serverfilename on OPDS Download (#14732) @shinobu
wallabag: fix status handling regression in article archiving (#14700) @fenuks
bump luajit-launcher (#14753) @hugleo
Kindle: Autodetect & handle the fancy gesture_tap input device (#14506) @NiLuJe
Book info: use screen pages for "time left in chapter" (#14754) @hius07
bump base (#14760) @benoit-pierre
- koreader/koreader-base#2243 (close #14759)
Upper menu: change activation gesture without restart (#14771) @hius07
"Ignore long-press on corners for time period" action (#14764) @hius07
feat(archiveviewer): extract all files button (#14770) @xydone
bump base: thirdparty updates, crengine tweaks (#14785) @poire-z
ReaderRolling: save percent_finished on flushing settings (#14787) @hius07
ReaderFooter: percent_finished in continious mode (#14794) @hius07
Status bar: adjustable font face (#14755) @hius07
improve and fix startup script change detection (#14725) @benoit-pierre
fix: 429 when querying wiki images (#14766) @oscargolding
Wikipedia: revamp languages handling (#14791) @poire-z
Update device.lua to support Tolino Vision Color (monzaKobo) (#14801) @prey87
[plugin] Wallabag: enforce starting URL with http or https (#13948) @Frenzie
Readerlink: add notification when following internal links on pdf (#12933) @jonnyl2
calibre: fix searching utf8 strings (#14813) @hius07
Add error handling to Kindle Wi-Fi functions (#14817) @cb12tre
Execute multi-action gesture/profile one by one (#14803) @hius07
kindle: fix restart on special offers devices (#14837) @benoit-pierre
feat: add lithuanian reader.dict monolingual dictionary (#14839) @BoboTiG
bump base (#14842) @benoit-pierre
- koreader/koreader-base#2256 (close #14841)
fix(opds): redraw OPDS download confirmation popup on Kindle/e-ink (#14836) @cb12tre
ReaderHighlight: fix tapping on self-overlapping highlight (#14852) @hius07
NewsDownloader: Add URL path encoding to improve request handling (#14870) @leakspin
[ReaderDictionary] clean stress marks from selection for dict search (#14856) @Commodore64user
docs: update macOS build requirements (#14894) @benoit-pierre
[PB700] Fix auto-orientation inversion after suspension (#14895) @jannickfahlbusch
TextBoxWidget: invert images when in night mode (#14893) @poire-z
[PB700] Simplify rotation suspension fix (#14897) @jannickfahlbusch
Highlights: improve 'Set color' dialog (#14699) @hius07
ReaderBookmark: color in bookmark list (#14714) @hius07
util.urlEncode: encode parentheses and quote (#14718) @emdioh
[Pocketbook] Execute rotation fix also for Era Color (#14904) @jannickfahlbusch
Bookmark browser (#14899) @hius07
FilemanagerCollection: fix disabling 'Export highlights' button (#14917) @hius07
[InputText] decouple text input state from VirtualKeyboard visibility (#14901) @Commodore64user
Bookmark browser: fix item font size init (#14926) @hius07
kosync.koplugin: Add custom hostname option for kosync plugin (#14172) @rspilk
[ImageViewer] add pan key_events to viewer (#14938) @Commodore64user
[TextViewer] bug fix, don't crash on Menu press (#14936) @Commodore64user
Page turns by swipes with disabled touch input (#14914) @hius07
[InputText] decouple text input state from VirtualKeyboard visibility pt. 2 (#14937) @Commodore64user
[DictQuickLookup] NT: add key_event for following links and switching (dict-wiki) domains (#14909) @Commodore64user
[InputText, ReaderStyleTweak] add copy/paste to NT devices (#14941) @Commodore64user
Fix long-pressing on unopened book with status (#14947) @hius07
Highlights: invert dialog colors in night mode (#14923) @hius07
Add support for Onyx Boox Note Air 5C, Fix Onyx Boox black screen on wake after font size change (#14956) @msk
Dispatcher: add "Edit/toggle book-specific style tweak" (#14944) @poire-z
fix appstream and appimage metadata (#14957) @benoit-pierre
appimage: switch to mkappimage (#14963) @benoit-pierre
Bump base (#14964) @Frenzie
newsdownloader: fix url path separator encoding bug (#14975) @MrToph
ci: bump docker image (#14976) @benoit-pierre
bump base & crengine: CSS enhancements and other fixes (#14979) @poire-z
Wikipedia EPUBs: use 1.5x image when 2x not available (#14984) @poire-z
sdl: switch to SDL3 (3.4.0) (#14983) @benoit-pierre
Properly set bootlogo on pocketbook (#14985) @floriansnow
CoverImage: fix inconsistent vertical alignment of cover image (#14987) @msk
[ReaderHighlight, Config, Menu] NT: stop text selection before any reflow action occurs (#14949) @Commodore64user
Stable pages in file browser 3 (#14952) @hius07
Fix max port number typo in Calibre plugin (#14991) @msk
Recurrent 429 error due to Wikipedia change (#14981) @oscargolding
calibre: use correct callback when Wi-Fi is off at connect time (#14998) @msk
[PB623] fix crashing due to NetMgrPing() missing (#14961) @tempura-san
bump base (#15000) @benoit-pierre
ReaderPagemap: fix saving page labels to sdr (#15007) @hius07
[Hotkeys] NT: BUG correct function call (#15009) @Commodore64user
InputDialog: fix adding widget with 'use available height' (#15010) @hius07
Bookmark browser: fix search (#15022) @hius07
Ask to open file (#15024) @hius07
Add translation context for bottom menu options (#15031) @SilverGreen93
fix(coverimage): fix operator precedence and parameter usage in cache functions (#15032) @msk
InputDialog: fix adding widget with 'fullscreen' (#15028) @hius07
File search: restore Lua patterns support (#15036) @hius07
[DictQuickLookup] NT: fix utf8 byte drift during text selection (#15015) @Commodore64user
calibre: escape dot in gsub pattern for series index cleanup (#15037) @msk
SSH.koplugin: option to force key-only auth (#15038) @ge-roy
[Language] i18n: add Slovenian language (#15050) @Commodore64user
'Open file' fixes (#15047) @hius07
bump base (#15052) @benoit-pierre
- Expose MuPDF's search function (koreader/koreader-base#2279)
- mupdf: add getMarkupAnnotationBoxesFromPage() (koreader/koreader-base#2280)
PDF: import embedded highlights (#15040) @hius07
BookStatusWidget: fix impossible to exit review editing due to focus loop (#15055) @Frenzie
[fix] BookStatusWidget: remove unused (#15060) @Frenzie
[Dispatcher] remove Gesture overview from non-touch devices (#15059) @Commodore64user
ci/macos: update upload-artifact action (#15046) @benoit-pierre
OPDS: fix crash on feeds with single-quoted XML attributes (#15068) @msk
KoptInterface: fix panel zooming when dewatermark is on (#15067) @Arcohol
Allow NewsDownloader plugin to download EPUB documents (#15065) @Witcher01
[doc] Add checklist about external plugins/patches, testing nightly and searching issues to bug report template (#15072) @Frenzie
OPDS: fix off-by-one in sync sub_table access (#15073) @msk
bump base (#15080) @benoit-pierre
- sdl: build our version for the linux target (koreader/koreader-base#2283)
- fix: SDL3 HiDPI return value check (koreader/koreader-base#2285)
- sdl: ensure we have a recent enough version (koreader/koreader-base#2288)
- make: tweak setup target (koreader/koreader-base#2289)
- sdl: enable mouse focus click-through (koreader/koreader-base#2291)
sdl: fix scrolling when fractional values are involved (#15077) @benoit-pierre
switch virtual keyboard default to false on hasKeyboard (#15057) @Commodore64user
Tweak bug report template: nightly test not required, avoid automatic reference to nightly ticket (#15084) @Frenzie
fix incorrect migration comment (#15086) @Commodore64user
[Calibre] preserve uuid field in calibre metadata serialisation (#15088) @Commodore64user
Update translations for v2026.03 (#15090) @Frenzie
[i18n] Add Gaelic language (#15091) @Frenzie
Add basic Dispatcher spec (#15062) @Frenzie
kopt: option to invert document in night mode (#14954) @Euphoriyy
fix(calibre-plugin): ensure size is correctly parsed as a number in book info in search (#14881) @CamilleHbp
[Kindle Scribe] Add support for kindle scribe stylus events (#14908) @k4rnaj1k
[chore] Clean up unused util in dispatcher_spec.lua (#15093) @Frenzie
Bump base for mupdf: add annotation type and contents getters (#15092) @Frenzie
fix: import embedded PDF annotations properly (#15076) @zeeyado
refactor duplication in #15088 (#15094) @Commodore64user
[ReaderFooter] Adds a fixed-width setting for progress bar alongside items (#14980) @jonnyl2
ReaderHighlight: don't try to write page bookmarks into PDF (#15097) @hius07
ci/macos: minor cleanup (#15103) @benoit-pierre
creopt: fix toggle order for Invert Images to be consistent (#15112) @Euphoriyy
bump base (#15117) @benoit-pierre
- SDL3: track mouse pointers and finger pointers separately (koreader/koreader-base#2295)
drop appimage target in favor of linux (#15116) @benoit-pierre
git: ignore debian packages (#15118) @benoit-pierre
cervantes: split update rule (#15119) @benoit-pierre
kopt: fix Invert Document regression with Reflow/Auto Straighten (#15123) @Euphoriyy
(opds): remove redundant UTF-8 fixup (#15122) @D4n1984

New Contributors

@loeffner made their first contribution in #14556
@phoffmeister made their first contribution in #14545
@den-is made their first contribution in #14578
@MrToph made their first contribution in #14650
@hanakomisa made their first contribution in #14672
@shinobu made their first contribution in #14732
@xydone made their first contribution in #14770
@oscargolding made their first contribution in #14766
@prey87 made their first contribution in #14801
@cb12tre made their first contribution in #14817
@leakspin made their first contribution in #14870
@jannickfahlbusch made their first contribution in #14895
@emdioh made their first contribution in #14718
@rspilk made their first contribution in #14172
@msk made their first contribution in #14956
@floriansnow made their first contribution in #14985
@tempura-san made their first contribution in #14961
@ge-roy made their first contribution in #15038
@Arcohol made their first contribution in #15067
@Witcher01 made their first contribution in #15065
@Euphoriyy made their first contribution in #14954
@CamilleHbp made their first contribution in #14881
@k4rnaj1k made their first contribution in #14908
@zeeyado made their first contribution in #15076
@D4n1984 made their first contribution in #15122

Full Changelog: v2025.10...v2026.03 — closed milestone issues

Installation instructions: Android • Cervantes • ChromeOS • Kindle • Kobo • PocketBook • ReMarkable • Desktop Linux • MacOS

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About KOReader (github version) v2026.03

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KOReader is a document viewer primarily aimed at e-ink readers.

Download • User guide • Wiki • Developer docs

Main features

portable: runs on embedded devices (Cervantes, Kindle, Kobo, PocketBook, reMarkable), Android and Linux computers. Developers can run a KOReader emulator in Linux and MacOS.
multi-format documents: supports fixed page formats (PDF, DjVu, CBT, CBZ) and reflowable e-book formats (EPUB, FB2, Mobi, DOC, RTF, HTML, CHM, TXT). Scanned PDF/DjVu documents can also be reflowed with the built-in K2pdfopt library. ZIP files are also supported for some formats.
full-featured reading: multi-lingual user interface with a highly customizable reader view and many typesetting options. You can set arbitrary page margins, override line spacing and choose external fonts and styles. It has multi-lingual hyphenation dictionaries bundled into the application.
integrated with calibre (search metadata, receive ebooks wirelessly, browse library via OPDS), Wallabag, Wikipedia, Google Translate and other content providers.
optimized for e-ink devices: custom UI without animation, with paginated menus, adjustable text contrast, and easy zoom to fit content or page in paged media.
extensible: via plugins
fast: on some older devices, it has been measured to have less than half the page-turn delay as the built in reading software.
and much more: look up words with StarDict dictionaries / Wikipedia, add your own online OPDS catalogs and RSS feeds, over-the-air software updates, an FTP client, an SSH server, …