Olexify
I build software that helps people achieve goals. Right now that’s Kitsumi, a browser extension that turns subtitled videos into a language lesson you didn’t plan on taking; Leonote, a Markdown notes workspace that is now free; Fennek OS, a free Linux desktop for life after Windows 10; and Rook, Paper, Scissors!, online chess with rules that fight back.
What I make
Kitsumi
Turns any subtitled video into a language lesson. 46 languages, nothing leaves the browser.
Leonote
Notes, a research graph, tasks and a player on top of plain Markdown files you already own.
Fennek OS
A familiar, private desktop for life after Windows 10. Your .exe programs still open.
Rook, Paper, Scissors!
Chess until the rules fight back. Plays in the browser, no install, no account.
Turn watching into learning
Interactive subtitles, dictionaries, study tools and flashcard mining, laid directly over the videos you already watch. Hover a word and you are studying.
No accounts. No telemetry. Your study data never leaves the browser.
to keep (a promise); to protect
→ add to Ankiものだ。
Watch
Anime, YouTube, Netflix, local files. Whatever you were already going to watch.
Understand
Click a word for readings, definitions, part of speech, difficulty and frequency.
Learn
Study Mode turns the current subtitle line into a vocabulary playground.
Remember
Mine the moment into Anki with context, screenshot, audio or video clip.
Your subtitles, your rules.
Pull them from the player or load your own .srt, .vtt or .ass. Font, size, position, colors and outline all move where you want them.
The subtitle hunt, without the side quest.
Jimaku, OpenSubtitles, SubDL and Kitsunekko searched from inside the video you are already watching.
One click becomes one card.
AnkiConnect integration, a draft queue, quick-mine and configurable context — with the screenshot, the audio or the clip attached.
Bring your own dictionaries.
.tsv files, Yomitan .json and .zip. If you have a dictionary, Kitsumi can read it, and Japanese gets the deluxe set.
The same lookups, off the player.
Articles Reader brings the dictionary to webpages, and optional OCR pulls text out of images and frames.
Set the offset once.
Offsets from 10 ms to 1000 ms, saved per show and carried into the next episode along with your whole setup.
Everything you think, in one app
Notes, a research graph, tasks, documents and a player, all sitting on top of plain Markdown files in a folder you already own.
Version 1.0, for Windows 10 and 11, with Linux next. Free on every computer you own: no account, no trial and no activation server. Point it at the notes you have and it is running — there is nothing to import and nothing to export.
Your folder, your files
Plain Markdown on your own disk, readable by every other editor you own. Nothing is locked in a database, and nothing is held hostage the day you stop paying attention to it.
A graph you can work in
Links, backlinks and tags become a map you actually navigate rather than a screensaver of dots. Open a thread of thought and follow it to the end.
One app instead of five
Tasks, documents, spreadsheets, slides and a video player live beside the notes, so the research never has to leave the room to get written down.
Windows 10 is over. Your PC isn’t.
A free, open-source Linux desktop that looks and works the way you are used to. Your .exe programs still open, unknown ones run in a sandbox, and nothing phones home.
Built on Fedora Atomic, KDE Plasma and Proton. No account, no telemetry, and it runs on the PC you already have — including ones that do not meet Windows 11’s hardware requirements.
Your .exe programs
Double-click and they open through Proton, the same layer that runs thousands of Windows games on Linux. No new habits, no hunting for alternatives.
A sandbox by default
Anything Fennek OS does not recognise runs walled off from your files. Right-click any file to check its fingerprint against VirusTotal; the file itself never leaves.
Updates that cannot break it
Signed, applied on restart, with the previous version always one boot away. Your home folder is snapshotted every hour, so ransomware gets undone.
Chess, until the rules fight back
Online chess with a twist the board never agreed to. Pieces move the way you remember — what happens when two of them meet is the part that changed.
The loudest thing I am building. It plays in the browser today and it gets a great deal louder from here.
The moves you know
Openings, forks, pins, endgames. Nothing about how pieces travel has changed, so everything you have learned still counts.
Captures become duels
Take a piece and the board asks how. Rook, paper and scissors decide it — which turns every trade into a read on your opponent.
Free, in the browser
Open the page and play. No download, no account, no launcher. It runs on the same domain you are reading now.
Work
A slice of what I’ve shipped. Most product work stays private — b-but it’s not like I built it for you or anything.
Kitsumi
Interactive subtitles, dictionaries, study tools and Anki mining on top of any video. 46 languages, free, private.
Leonote
Notes, a research graph, tasks and a built-in player in one app. Plain Markdown, opened from the folder you already have. Version 1.0, free, no account.
Fennek OS
A free desktop for life after Windows 10. Looks the way you are used to, runs your .exe programs, sandboxes unknown ones and sends nothing home.
Rook, Paper, Scissors!
Chess until the rules fight back. Standard moves, duels for captures.
Games & experiments
Engine side quests. Some become projects, some become cautionary tales.
A medieval multiplayer game
Unannounced. Updates will land on YouTube first.
Who’s behind this
Developer, builder of oddly specific utilities, language learner. Kitsumi started as a script to stop pausing anime every four seconds; a few people now depend on it. Things usually begin with “wait… this would actually be funny” and become a repository shortly after.
Support development
Everything I make is free. Support pays for the hours behind it, and for the servers and store fees underneath.
Questions people actually ask
Yes. No accounts, no subscriptions, no tracking, no telemetry. Study data and mined cards stay in your browser's local storage. Support is optional and funds development.
No — 46 languages. Japanese gets the deluxe dictionary package: JMdict, JMnedict, KANJIDIC, pitch accent, frequency and JLPT information.
No. It doesn't replace Anki, textbooks, tutors or your language course, and it doesn't promise fluency in 30 days. It's the missing layer between watching something and actually learning from it.
Only if you bring your own API key. Groq can clean up definitions and examples, WaveSpeed can generate scene imagery. Both are opt-in — no key, no AI.
Netflix, Crunchyroll, YouTube, local videos and most HTML5 players, with .srt, .vtt and .ass files. Subtitle search is built in, and per-show offsets survive episode changes.
Windows 10 and 11 today. Linux is coming next, and macOS maybe, someday.
No catch. It was going to be a paid app, and I would rather it reach every student who needs it. No ads, no account, no trial timer and nothing locked behind a paywall.
No. Point Leonote at the folder and it opens as it is. Nothing is converted, so you can keep using your other apps on the same folder.
Uninstall it. You paid nothing, and your notes were never inside Leonote to begin with, so there is nothing to export.
Not as a public download yet. An installer ISO is already built automatically for testers, and the first public release will be announced on GitHub and on the Discord server. Until then, Fennek OS is for virtual machines and spare PCs.
Many will, not all. Proton runs a huge number of Windows programs, especially games. Kernel-level anti-cheat, some drivers and a few heavy professional suites may not. The aim is for Fennek OS to tell you plainly when something can’t run.
Yes, that’s the plan. “Restart to the other OS” already works: one click, and the next boot goes to Windows once. Installing next to it, with Secure Boot left on and BitLocker detected and explained, is being tested on real hardware now.
Yes. Free to download and use, and the source is GPL-3.0. No account, no subscription, no ads.
Fedora’s image-based (atomic) system with KDE Plasma, through Universal Blue: a current Linux kernel, quick hardware support, and updates that can always be rolled back.
It’s German for the fennec fox: small, sharp-eared and at home in harsh places. A good mascot for an OS that listens for trouble and runs on little.
Pieces move exactly the way you already know. What changed is what happens when two of them meet — captures are settled by a rule the board did not agree to.
No. It runs in the browser at rookpaperscissors.com. No download, no account.
Yes, free to play in the browser.
It helps, and it also stops helping the moment the new rule decides a fight. Knowing the moves is enough to start.
A multiplayer medieval game in development. It is not announced yet, so it does not have a public name on this site.
No date. When there is something worth showing, it goes up on YouTube first.
Because names are hard to change once they are public, and this one is not final.
The YouTube channel and the Discord. Both are linked in the contact section.
The work behind these projects — what I am building, what broke, and the occasional thing that started as a joke at 2AM.
Whenever a project reaches something worth watching rather than on a fixed schedule.
Yes. Email or Discord, both in the contact section. "This sounds dumb but hear me out" is a fine opening line.
Yes. Email is the surest channel; Discord is the fastest.
Say hello
Ideas, collaborations, controlled chaos. Email is the surest way to reach me; Discord is the fastest.
