Cosmas Free for Windows
Cosmas is a desktop app for roleplayers. It reads the recordings you already make with Medal or OBS and helps you turn them into characters, factions, places and events you can find again. Your chronicle stays on your PC and stays private until you decide to share it.
If you play on roleplay servers, you probably record. Medal clips the best bits, OBS keeps whole evenings, and after a month nobody remembers which night the duke was poisoned or what the blacksmith’s daughter was called.
Cosmas sorts those recordings by game and evening, plays the game, Discord and your microphone as separate tracks, and lets you mark the moments that matter. From there you build the story: events with a write-up and a journal, characters with portraits and relationships, factions, houses, places and servers, all on a timeline.
Optional AI does the boring part: it transcribes what was said, describes what was on screen, reads the name tags above characters and drafts a chronicle of the evening for you to accept or throw away.
Built in the CZ/SK roleplay community, for anyone who plays a character for longer than one evening.
Keep your character’s story straight across servers and months: who they met, what they promised, where it happened, with the clip to prove it.
You already record with Medal, OBS or ShadowPlay. Cosmas finds the folders on its own, keeps the separate audio tracks and turns hours of footage into moments you can find.
Publish characters, houses and events to the public chronicle with your name and a licence, and let others ask before they reuse your lore.
Six steps from a raw recording to a story you can share.
Play as usual with Medal, OBS or ShadowPlay running. Separate audio tracks for the game, Discord and your mic are kept.
Cosmas finds your recording folders, sorts clips by game and evening and reads Medal’s titles and hotkey bookmarks.
Mark moments and segments while you watch, take snapshots and portraits, cut clips to MP4.
Group an evening into an event, tag who was there, write it up and keep a dated journal.
See the whole story on a timeline, a calendar or per character. AI can draft events from what was said.
Sign in with Discord to sync with the web. Share a record by link, publish it, or use the character on Discord.
The desktop app does the heavy work on your PC. These are real screenshots with made-up demo data.
Every clip and recording in one place, grouped by game and evening.
Videos\Medal, X:\Medal); add OBS, ShadowPlay or any other folder.
Hear exactly the part you need: the game, Discord or yourself.
Bookmarks and segments from all your videos, attached to events and characters.
The story itself: what happened, when, where and who was there.
A database of your world that keeps track of who is who.
The whole chronicle in order, across servers and evenings.
Optional and off until you choose where it runs. Free on your own PC, or through a paid service you pick.
After a transcript, a stronger text model reads the evening in blocks with a running memory of the plot and what your database already knows.
Cosmas looks at your graphics card, memory and processor and recommends what your PC can handle.
Each audio track separately (you, the game, Discord), in the background, one video after another. Search in what was said and turn on subtitles in the player.
Frames are described mostly during conversations. The model reads name tags above characters and links them to your characters and players.
Faces found in conversations can become portraits, and characters are recognised by clothing and hair across a session.
The queue pauses while you play a game and continues afterwards, and picks up where it stopped after a restart.
One chronicle, two ways in. The desktop app does the heavy work on your PC; the web version needs no install. They sync when you sign in.
| Feature | Desktop app | Web Alpha |
|---|---|---|
| Install | yes Installer for Windows 10 and 11 | yes Nothing to install, runs in the browser |
| Recordings library | yes Finds Medal folders on its own, OBS and ShadowPlay folders too | yes Local folders in Chrome and Edge, nothing is uploaded |
| Medal details | yes Clip titles, games and hotkey bookmarks | no dates from file names only |
| Player with moments | yes Every format | yes YouTube and local MP4/WebM |
| Multi-track audio | yes Game, Discord and microphone at once | no one track |
| Clips | yes Export a segment to MP4 | no segments only, no export |
| AI transcripts and image descriptions | yes On your PC for free, or a paid service | no |
| AI chronicler | yes Suggests events, places and characters | no |
| Characters, factions, places, events, letters | yes | yes |
| Timeline and calendar | yes | yes |
| Share links and the public chronicle | yes Through sync | yes |
| Works offline | yes | no |
The web version is an early alpha. It shares your chronicle with the desktop app but doesn’t do the heavy work: no multi-track audio, MP4 export, AI or Medal details yet.
Cosmas is local first. Nothing leaves your PC unless you sign in, sync or pick a paid AI service.
The catalogue is a file on your disk and works offline. Your video files are never uploaded.
When you sync, your chronicle is stored on the Cosmas server, private until you share a link or publish a record.
Local AI keeps everything on your PC. A paid service receives only the audio or frames it needs, and only from you.
The community RP bot reads your characters straight from Cosmas, so there is one sheet to keep up to date.
Switch it on for a character and play it in the community’s Discord worlds: /ic messages in its name, its inventory and scenes.
Characters shared by link or published get a card in the community’s character forum. It updates when you edit the character.
Search the public chronicle from any channel and post a record as a card with a link.
What you publish carries your name and your terms.
Each published record shows its author and the date it was first published, as proof of who came up with it.
All rights reserved, use with permission, CC BY, CC BY-NC or CC0. You choose per record.
“I want to use this” notifies the author, and a log shows on which servers the lore was used.
Revision history with rollback, edit suggestions, discussion, and reports that go to the moderators.
Free, installs in two minutes without administrator rights, and keeps your recordings where they are.
Something else? Ask on the community Discord or send feedback.
Yes. The desktop app, the web version and the public chronicle are free. AI can run on your own PC at no cost; paid AI services are optional and you pay them directly.
No. Medal gives the richest details (clip titles, games, hotkey bookmarks), but any folder with recordings works: OBS, ShadowPlay or anything that saves video files.
The desktop app is for 64-bit Windows 10 and 11. On macOS, Linux or a tablet, use the web version in the browser; local recording folders work best in Chrome or Edge.
The desktop app keeps the catalogue, thumbnails and transcripts in %LOCALAPPDATA%\Kronikar on your PC. The web version stores your chronicle on the Cosmas server, private until you share it. Details are on the privacy page.
Cosmas checks for a new version and can download and install it for you; the download is checked against its published SHA-256. You can also run a newer installer by hand. Your data stays either way.
The app is named after Cosmas of Prague, the oldest Czech chronicler: Cosmas in English, Kosmas in Czech. Older versions were called Kronikář, which is why the data folder is still named Kronikar.
Use the feedback form, optionally with a screenshot and the app log. It goes to the moderators and the developer.