I Built a Screen Recorder in the Browser Without Any Backend — Here’s How

I needed a simple way to record my screen directly from the browser — no extensions, no backend, no bloated tools.

Most solutions I found were either:

• Heavy Chrome extensions
• Required a server
• Or locked behind paywalls

So I decided to build a lightweight screen recorder using the browser’s native MediaRecorder API.

Modern browsers expose powerful media APIs that are still underused.

The MediaRecorder API allows you to:

• Capture video and audio streams
• Control recording lifecycle
• Export recordings as blobs

Best part: no external libraries required.

The flow is straightforward:

1. Request screen access using navigator.mediaDevices.getDisplayMedia()
2. Pass the stream to MediaRecorder
3. Collect video chunks
4. Export them as a downloadable file

This can be useful for:

• Developers recording bug reproductions
• Quick tutorial creators
• Internal demos or documentation
• Anyone who wants a no-install screen recorder

The project is fully open-source, and I’d love feedback or contributions.

GitHub repo:
👉 https://github.com/rohaaaaaan/screen-recorder

If you find it useful, consider giving it a ⭐ — it really helps with visibility.

This was a fun exploration of browser media APIs, and I’m planning to improve it further.

If you’ve built something similar or have ideas for improvement, I’d love to hear your thoughts.