Always ready
The replay buffer runs in the background. You never have to remember to hit record.
Free beta · Windows 10 & 11
Krak · Your best moments. On your PC. Forever.
Krak keeps the last seconds of your game in memory. Hit a key and the clip is saved, instantly. No account, no cloud, no watermark.
- 100% local
- No account
- No watermark
- Open source
The app
Simple on day one. Deep when you need it.
Nothing to set up: Krak works right after install. The advanced options are there, tucked away.
Your library, sorted by game. Favorites, search, rename, multi-select.
How it works
Play. Press. Share.
Krak runs in the background and asks for nothing. The day you pull off the play of your life, it is already recorded.
- 01
Play like always
The last seconds stay in memory, all the time (30 by default, up to 5 minutes). Encoded by your graphics card, built to be invisible on your FPS.
- 02
Press F9
The clip is written straight from memory, no re-encoding. A discreet notification confirms it is in the bag.
- 03
Trim and share
Cut it in the editor, adjust the sound, then export for Discord at 10, 50 or 500 MB. Or keep the MP4: it is yours.
Features
Everything you need. Nothing in the way.
A real clipping tool, made to stay out of your way while you play.
Light on your PC
Hardware encoding on your graphics card: native NVENC on NVIDIA, Media Foundation on AMD and Intel. If it gets tight, Krak lightens itself instead of dropping frames.
Built-in editor
Trim bar, waveforms, game and mic volume set separately and remembered for each clip.
Nothing injected into your games
Krak captures the screen with the Windows API, like OBS or Discord. It never touches a game or reads its memory.
100% local
Clips are plain MP4 files on your drive. Nothing is uploaded anywhere unless you decide to.
Ready for Discord
One-click export under 10 MB, 50 MB or 500 MB, whatever your plan. Optional “by krak” badge.
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Continuous recording
Record a whole session without stopping the replay. Written as it goes: a crash costs one second, not your session.
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Screenshots
Ctrl + F9: full-resolution PNGs, with their own page.
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Separate audio tracks
Game and microphone on their own tracks, plus a mix every player picks by default.
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Discord Rich Presence
Your friends see Krak on your Discord profile. Can be turned off.
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12 languages
Krak follows the language of Windows: English, French, Spanish, Portuguese, German, Italian, Polish, Turkish, Russian, Japanese, Korean, Chinese.
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Automatic updates
Signed updates, installed in one click. You always have the latest version.
Our principles
What you won’t find in Krak.
-
Creating an account -
Your clips uploaded to a server -
A forced watermark -
Ads -
Telemetry -
Anything injected into your games
The code is public: you don’t have to take our word for it, you can check.
Requirements
What you need
- System
- Windows 10 or 11, 64-bit
- Graphics card
- NVIDIA (native NVENC) · AMD and Intel (Media Foundation) · software fallback
- Codecs
- H.264, HEVC, AV1 depending on your card
- Quality
- Standard, High, Premium presets
- Audio
- Game sound and microphone, on separate tracks
- Files
- Standard MP4 and PNG, in your Videos folder
- Price
- Free and open source (GPL-3.0)
Open source
The code belongs to everyone.
Krak is free software under the GPL-3.0. Read the code, report a bug, suggest an idea or translate Krak into your language: it all happens on GitHub.
$ git clone https://github.com/KryoStudio/kryo-shard
$ cd kryo-shard && npm install
$ npm run tauri dev
Built with Rust Tauri Svelte
Roadmap
Where we are
Already in
- Always-on replay buffer, native NVENC encoding
- Glacier library: games, favorites, search, player
- Editor with trim and separate audio tracks
- Export to Discord at 10, 50 or 500 MB
- Continuous recording, safe from crashes
- Screenshots, Discord Rich Presence
- Signed automatic updates, 12 languages
Before the first stable
- Windows code signing (no more SmartScreen warning)
- Native AMD and Intel encoders
- Separate Discord voice track
- Mouse cursor in clips
- Choice of the captured screen
Later
- Auto-clips (Rocket League first)
- Vertical 9:16 for TikTok and Shorts
- Slow motion
- Text and local subtitles
- Import from ShadowPlay, OBS, Medal
- Community translations and detectors
Community
Join the crew.
Post your best shards, suggest ideas, help test the betas. Krak is built with the people who use it.
FAQ
Questions, answers
Is Krak really free?
Yes. Krak is free and open source (GPL-3.0 license). No subscription, no ads, no account to create.
Does Krak touch my games (anti-cheat)?
No. Krak captures the screen with Windows’ desktop duplication API (DXGI), the same one OBS and Discord use. It never injects into a game and never reads its memory.
What is the impact on my FPS?
Encoding runs on your graphics card, in a part of the chip dedicated to video, so the impact is built to be invisible. If the encoder can’t keep up (a very heavy game, a very high frame rate), Krak switches to lighter settings on its own instead of dropping frames.
Does it work with an AMD or Intel graphics card?
Yes. On NVIDIA, Krak talks to NVENC directly. On AMD and Intel it goes through Windows Media Foundation, with a software fallback. Native AMD and Intel encoders are on the way.
Windows says “Windows protected your PC”. Is that normal?
Yes, for now. Krak is new and its installer isn’t code-signed yet, so SmartScreen doesn’t know it. Click “More info”, then “Run anyway”. Code signing is planned before the stable release.
Where are my clips saved?
In a folder on your PC (Videos\Krak by default, you can change it in the settings), as standard MP4 files that any player opens.
Does Krak collect my data?
No. There is no account and no telemetry. The only thing Krak does online is check GitHub for updates.
Is Krak available on Mac or Linux?
Not for now: capture relies on Windows APIs (DXGI, WASAPI). Krak runs on Windows 10 and 11.
How do I share a clip on Discord?
Open the clip, trim it if you want, then Export: pick 10 MB (no Nitro), 50 MB or 500 MB and Krak fits the clip under the limit.
Is Krak an alternative to ShadowPlay or Medal?
Yes: like them, Krak keeps your last seconds and saves them with one key. The difference: everything stays on your PC, with no account, and the code is open.
How do I update or uninstall Krak?
Krak updates itself. To uninstall it, go to Windows Settings › Apps. Your clips stay in their folder.
Can I help?
Gladly: report a bug, suggest an idea or translate Krak on GitHub. And tell your friends about Krak, it helps a lot.