Capscreen — Free Open-Source Screen Recorder for Mac & Browser
Capscreen is a free and open-source screen recorder. Record your screen,
webcam, and microphone directly in the browser with no installation, or use the optimized
one-line macOS CLI built in Rust. H.265 and VP9 codecs produce files up to 70%
smaller, making Capscreen ideal for product demos, tutorials, bug reports, and
presentations.
What is Capscreen?
Capscreen is a lightweight screen-capture tool available two ways: a
browser-based web recorder that works on macOS, Windows, and Linux with
no download, and a native macOS CLI built in Rust for maximum
performance. Both share the same goal — fast, high-quality, compact screen recordings you
can share instantly. The project is MIT-licensed and fully open source on GitHub.
Key features
- One-command recording — start a capture instantly in the browser or terminal.
- Up to 70% smaller files — WebM/VP9 and H.265 codecs shrink recordings for easy sharing.
- Camera & microphone capture — record your face and voice and composite them onto the screen.
- Auto zoom & cursor highlight — automatically zoom into cursor regions with motion-blurred transitions.
- Click & keystroke effects — visual ripples on clicks and on-screen shortcut badges.
- Smooth cursor — spring-physics eased cursor for polished, Screen Studio-style presentations.
- Drawing overlay — freehand annotations during recording.
- Edit in the browser — trim, split, merge, add effect markers, and batch-process multiple videos.
- Export options — GIF, MP4, WebM, standalone HTML player, and PPTX PowerPoint decks.
- Audio tools — noise suppression, loudness normalization, silence removal, and background music mixing.
- AI transcription — extract WAV audio and generate transcripts and chapter markers.
- 9 languages — full internationalization including English, Chinese, Japanese, Korean, Spanish, French, German, and Vietnamese.
How to record your screen
- Open the Capscreen web recorder in your browser — no installation required.
- Choose a format (WebM for smallest size or MP4 for compatibility) and optionally enable microphone and camera.
- Press Start Recording and pick the screen, window, or browser tab to capture.
- Stop when you're done. Your video stays in the browser until you download it.
- Download the video, or export it as a GIF, HTML slideshow, or PowerPoint (PPTX) deck.
Prefer the command line? Install with Homebrew and record in one line:
brew install yingkitw/tap/capscreen
capscreen capture --duration 10
Supported output formats
- WebM (VP9) — up to 70% smaller, best quality-to-size ratio for web and email.
- MP4 (H.265) — about 50% smaller than H.264, good compatibility.
- MP4 (H.264) — maximum compatibility across all devices.
- GIF — short animated clips for docs and chat.
- HTML slideshow — a standalone, self-hosted player page.
- PPTX — a PowerPoint deck generated from captured frames.
Capscreen vs other screen recorders
Capscreen is a strong free, open-source alternative to Loom, Screen Studio, OBS
Studio, and Cap.so. Unlike paid tools, Capscreen combines browser-based
recording, auto zoom, cursor and click effects, camera compositing, in-browser editing,
transcription, and PPTX/HTML export in a single lightweight, MIT-licensed package — with
no watermarks and no account required for the self-hosted app.
- vs Loom: Capscreen is free and open source, with no recording-length limits and local files you own.
- vs Screen Studio: Capscreen offers similar auto-zoom and smooth-cursor polish at no cost, and runs in the browser.
- vs OBS Studio: Capscreen is far simpler — one click to record, with built-in editing and export presets.
- vs Cap.so: Capscreen focuses on instant capture and compact files rather than video hosting.
Common use cases
- Product demos — record feature walkthroughs with auto zoom and click effects.
- Tutorials and how-tos — narrate steps and export a PowerPoint deck.
- Bug reports — capture short, compact clips that attach easily to tickets.
- Async updates — record presentations with your camera in the corner.
- Social content — export 9:16 vertical clips or GIFs for sharing.
Frequently asked questions
Is Capscreen free?
Yes. Capscreen is 100% free and open source under the MIT license, with no watermarks or trial limits.
Do I need to install anything?
No. The browser recorder works with no installation. For native macOS performance, install the CLI with brew install yingkitw/tap/capscreen.
Does it record audio and webcam?
Yes. You can capture system audio, microphone narration, and a webcam feed at the same time.
What platforms are supported?
The browser recorder works on macOS, Windows, and Linux. The CLI targets macOS 10.15+.
Can I turn a recording into a slideshow or PowerPoint?
Yes. Capscreen exports recordings as HTML slideshows or PPTX decks.
Capscreen is open source on
GitHub and licensed under the MIT
License. Start recording now in your browser — no download required.