Tutorials
How to Record Your Screen Online Without Installing Software
Capture your screen, browser tab, or window with optional audio — then preview and download WebM on your device.
Quick tutorials, bug reports, and meeting clips often start with a screen recording. Screen Recorder captures your display, window, or browser tab with optional system audio and microphone, then saves WebM directly from the browser without requiring OBS or a cloud recorder.
When browser recording is enough
Choose ALTools screen recording when you:
- Need a fast demo for Slack, Notion, or email
- Want pause/resume without learning a heavy NLE
- Prefer keeping footage on-device until you choose to share
Upgrade to a desktop studio app when you need multi-cam, virtual sets, or long 4K productions with scene switching.
Step-by-step: record your screen
- Open Screen Recorder in Chrome, Edge, or Firefox (feature support varies).
- Set resolution (720p–4K), frame rate (30 or 60 fps), and start delay so the browser picker is not captured.
- Choose system audio and/or microphone if needed. Tab audio works best when sharing a browser tab.
- For long sessions, enable Save to disk while recording (Chrome/Edge) to avoid memory limits.
- Click Start Recording, pick screen/window/tab in the OS prompt, wait for countdown if set.
- Use Pause / Resume as needed, then Stop & Preview.
- Download WebM or record again. Optionally post-process with Trim Video or Video to MP4.
Leave the tab open until recording finishes.
Audio capture notes
| Source | Tip |
|---|---|
| Tab audio | Share a tab, not entire screen, in Chrome/Edge |
| Microphone | Grant mic permission; use headphones to reduce echo |
| System audio | May be unavailable on some OS/browser combos |
Test a five-second clip before a one-hour meeting.
Resolution and performance
- 720p / 1080p — best default for most demos
- 2K / 4K — large files; enable save-to-disk and use capable hardware
- 60 fps — smoother motion, bigger files
High resolutions without save-to-disk can exhaust browser memory on long recordings.
After recording: a light polish chain
Most raw WebM screen captures benefit from three quick passes:
- Trim Video — remove the countdown tail and false starts from the share picker
- Video to MP4 — Fast-Start MP4 plays nicer in Slack, Teams, and email
- Compress Video — if the demo still exceeds your upload cap
Add Add Subtitle to Video only after picture is locked — burn-in re-encodes again.
For bug repros, pause the recording at the error state for two seconds so viewers catch the frame without rewinding.
Mute notifications before recording tutorials — OS toast popups in screen captures are hard to edit out without blur or crop.
Hide personal bookmarks and extensions in the browser profile you record — viewers notice messy toolbars more than presenters expect.
Dual-monitor setups: choose Window capture for the demo app only instead of full screen if your second display has sensitive email.
Close chat apps with avatar badges in the menu bar — macOS screen recordings often capture notification badges unintentionally.
Optional: fix duration metadata
Fix duration after recording rewrites metadata so VLC and editors show correct timeline length. It adds a short wait when stopping. Disable if you do not need it, or if you saved directly to disk (fix may be unavailable).
Common issues
Permission denied. User cancelled the share picker — restart and approve.
Empty recording. Sharing stopped too early; keep capture active until you press stop.
No system audio. Switch to tab capture or check browser support.
Preview skipped for huge files. Expected when saving to disk — open the file in VLC or convert with Video to MP4.
Frequently asked questions
What format is the recording?
WebM — convert to MP4 with Video to MP4 for wider sharing.
Can I record just one app window?
Yes — choose Window in the browser share dialog.
Related tools
- Trim Video — cut dead air after recording
- Video to MP4 — WebM to MP4 with Fast-Start
- Compress Video — shrink file size before sharing