Your manganever leaves home.
Mitsu is a library and reader that runs entirely on your PC. Drop in CBZ, ZIP, or a folder of scans. It indexes every page, remembers where you stopped, and never asks who you are.
74 MB for Windows 10 and 11. No account, no cloud, no telemetry.
Built around the way you actually read.
No upload wizard. No library folder you have to reorganise. No account standing between you and page one.
Drop it in. That’s the import.
CBZ, ZIP, a folder of scans, or a whole library root. Mitsu reads what is inside, builds the covers, and leaves your originals exactly where they were.
It remembers the page, not your email.
Close the laptop mid-spread. Open it a week later and you are on the same page, at the same zoom, facing the same direction.
Every page, exactly how you like it.
Single pages or spreads, right-to-left or left-to-right, fit width or fit screen. The controls stay out of the way until you reach for them.
This is a live component. Turn a page, flip the direction, change the spread.
Manga order by default, LTR when it suits the page.
Two pages at once, hinged on the spine, or one at a time.
Let a long chapter run. Your place is saved either way.
Wheel, pinch or keys, from fit-width to pixel-level.
Nothing leaves this machine.
Mitsu has no account system, no analytics endpoint and no cloud storage. There is nowhere for your library to go.
%APPDATA%\app.mitsu.desktopCopy it to another PC and your shelves, covers, bookmarks and reading progress come with you. There is no export step.
There is no sign-up form, no login and no user ID. Open the app and your shelves are already there.
No analytics, no crash pings, no usage counters. Nothing about your reading leaves the process.
Pull the ethernet cable. Imports, covers, reading and backups all keep working exactly as they did.
A shelf that finds things.
Everything you import is indexed as it lands, so the shelf is searchable before you finish making tea.
Titles, artists, tags, and the names of files you dragged in.
Reading, unread, completed, favorites. The shelf remembers.
Group a series, put the volumes in order, then jump straight back in.
Questions, answered.
Something broken, missing, or just odd? The issue tracker is the fastest way to reach the person who wrote this.
In a folder on your PC. The desktop app keeps its database, covers and imports in %APPDATA%\app.mitsu.desktop, and your original files stay wherever you put them. Copy that folder and you have moved your library.
No. There is no sign-in, no sync and no telemetry. Once the installer is on your machine, Mitsu opens and reads offline. The only thing it asks the network for is an update check, and only when you open Settings.
CBZ and ZIP archives, single images, and folders of scans. Point Mitsu at a library root and it indexes everything inside. Discover can also pull a gallery straight from nhentai if you would rather not download it first.
Today the one-click installer is Windows 10 and 11. The same app runs anywhere Docker runs, so on a Mac or a Linux box you can start the container and read in your browser. A native macOS build is not shipped yet.
Yes — MIT licensed, source on GitHub, no paid tier and nothing to unlock. There is no server to pay for because there is no server.
Windows SmartScreen will warn you the first time because the build is not code-signed by a certificate authority. Choose More info, then Run anyway. Every release also publishes a SHA-256 checksum next to the installer, so you can verify the download before you run it.
Your next chapter is already on your disk.
Install Mitsu, point it at a folder, and start reading in about a minute. No account, no trial, no card.
74 MB installer for Windows 10 and 11. A SHA-256 checksum ships next to every release. The installer is unsigned, so SmartScreen may ask you to confirm the first launch: choose More info, then Run anyway.