Screen Recorder
Record your screen, app window, or browser tab and export directly to GIF or WebM video. Everything processes privately in your browser with zero uploads.
When you start recording, the browser asks what to share. The video never leaves your computer; the file is created in the browser.
System audio
When sharing a tab, also tick the “share tab audio” box the browser shows.
Microphone
Tips
- Share only the target application window rather than your entire desktop to keep notifications out of the recording.
- Check the tab audio sharing checkbox during source selection if you need to capture internal browser sound.
- Keep recordings under fifteen seconds when exporting to GIF, as longer animations generate massive file sizes.
How to use it
- 1 Select your capture source by choosing an entire screen, application window, or browser tab.
- 2 Grant browser permissions and click start to begin your screen recording.
- 3 Stop the recording when finished and choose whether to export as a WebM video or an animated GIF.
- 4 Save the generated file directly to your device once in-browser encoding finishes.
What you should know
Capturing browser workflows, software bug reports, and product demos requires balancing visual clarity with distribution format constraints. Modern web applications rely on screen capture APIs to grab display buffers directly from your operating system. While exporting to WebM provides 24-bit true color, high temporal compression, and synchronized audio at lightweight bitrates, animated GIFs remain standard for README documentation and chat apps. However, GIF format restricts each frame to a 256-color palette and uses basic LZW compression without temporal inter-frame prediction, meaning unoptimized recordings can balloon in file size if they contain continuous UI motion or gradients.
This tool captures any monitor, application window, or browser tab locally using native browser capture capabilities. Once you finish recording, an in-tab WebAssembly engine encodes your stream into either a WebM video or an animated GIF without sending data to any external server. Exporting as a GIF strips audio streams and quantizes frames to an indexed palette, while WebM preserves audio and full chromatic depth. Because WebAssembly encoding operates single-threaded in the tab, compiling longer high-resolution clips to GIF takes noticeable processing time, making WebM the recommended choice for extended captures.
Frequently asked questions
Why does encoding a GIF take longer than recording the video?
Converting video frames to GIF requires generating an optimized 256-color palette and dithering every single frame. Because the client-side WebAssembly engine runs in a single thread inside your browser tab, rendering long or high-resolution captures requires significant mathematical processing.
Does the screen recorder record system or microphone audio?
You can capture tab or system audio if supported by your browser and operating system during source selection. Animated GIF files cannot contain audio tracks, so choose the WebM format if you need sound.
Are my recorded screen captures uploaded to any server?
No. The recording and video encoding run entirely within your local browser tab via client-side WebAssembly and media APIs, ensuring your recordings remain completely private.
Guides
Articles and format references related to this tool.
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