What is Screen Recorder?
Screen Recorder is a free, browser-based tool in the Video & Audio Tools suite. Capture your screen, a window, or a browser tab with optional microphone audio using getDisplayMedia + MediaRecorder. Preview live, stop, and download a WebM file. 100% client-side — no upload.
The headline benefit: record your screen (and mic) entirely in your browser — no installs.
Unlike most online tools that upload your file to a server, process it, and send it back, Screen Recorder runs entirely in your browser. Open DevTools → Network while using it and you'll see zero file-upload requests — only static assets (JavaScript, CSS, fonts) load. Your data never leaves your device.
Why use this screen recorder?
Three reasons EasyFileKit's Screen Recorder stands out from the crowd:
- **Private by design** — all processing happens locally via JavaScript and WebAssembly. No server ever sees your input.
- **Instant** — no upload wait, no queue, no server round-trip. Results appear the moment you act.
- **Free & unlimited** — no accounts, no watermarks, no daily caps. Use it as many times as you like.
How to use Screen Recorder — step by step
Here's the complete walkthrough. Everything happens instantly in your browser:
- **Step 1.** Toggle “Record microphone” if you want your mic included.
- **Step 2.** Click “Start recording” and grant screen-capture permission.
- **Step 3.** Use the browser's native stop button or click “Stop & save” here.
- **Step 4.** Preview the recording and download the WebM file.
That's it. No sign-up, no upload bar, no waiting. If something doesn't work as expected, check the FAQ below.
Common use cases for Screen Recorder
People reach for Screen Recorder in a few recurring situations:
- When you need the result **now** and can't wait for a server-based tool to upload, queue, and process your file.
- When your file is **private or sensitive** — financial documents, personal photos, medical PDFs — and you don't want it travelling across the internet.
- When you're on a **slow or metered connection** — uploading a 50 MB file just to compress it makes no sense when the same work can happen locally.
- When you've hit the **daily limit or paywall** on another "free" tool site.
Privacy: what actually happens to your data
This is the single most important point about Screen Recorder, so it deserves its own section.
When you use this tool, your input is processed by JavaScript running in your browser tab. The code is downloaded once (cached afterwards) and executes locally on your CPU. At no point is your file, your text, or your input data transmitted to any server.
You can verify this yourself in under 30 seconds:
- Open Screen Recorder in your browser.
- Press F12 to open DevTools.
- Switch to the Network tab and tick "Disable cache".
- Use the tool — drop a file, type text, whatever the tool needs.
- Watch the Network log. You'll see only static assets (JS, CSS, fonts, icons). No request contains your data.
This isn't a setting you toggle or a promise in a privacy policy — it's how the tool is architecturally built. There is no upload endpoint to call.
Frequently asked questions about Screen Recorder
Q: Where is the recording stored?
A: Only in your browser memory and the file you download. Nothing is uploaded while recording. The output is a WebM (or MP4 on Safari) file written locally.
Q: Can I record system/tab audio?
A: Yes — when Chrome or Edge shows the screen-share dialog, tick “Share audio” to capture the tab or system audio. Firefox supports tab audio on Linux.
Q: Can I record my microphone at the same time?
A: Yes. Enable the “Record microphone” toggle and grant mic permission. The mic track is mixed into the recorded stream alongside the screen audio.
Q: Why is the output WebM and not MP4?
A: MediaRecorder in Chrome and Firefox encodes VP9/VP8 video in WebM. Safari may produce MP4. We pick the best supported codec automatically.
Q: How long can I record?
A: There's no hard limit, but very long recordings consume memory. For hour-plus captures, use a native tool like OBS.
Q: Why was permission denied?
A: You dismissed the browser prompt, or your browser/OS blocks screen capture (e.g. some Linux setups need PipeWire). Grant permission and try again.
Screen Recorder: EasyFileKit vs server-based tools
Most "free" online tools that do what Screen Recorder does follow the same model: you upload your file to their server, they process it with a backend script, then they send the result back. Here's the honest comparison:
| | EasyFileKit | Server-based tools |
|---|---|---|
| **Your file leaves your device?** | Never | Yes, uploaded to a server |
| **Speed** | Instant (no upload) | Slower (upload + queue + download) |
| **Privacy** | Complete | Your file is on someone else's computer |
| **Cost** | Free, unlimited | Often capped or "premium" gated |
| **Works offline** | Yes (PWA) | No |
Server-based tools aren't evil — they exist because some tasks genuinely need heavy backend compute. But for everything Screen Recorder does, client-side processing is strictly better for you.
Under the hood: how Screen Recorder works
Screen Recorder is built with modern browser APIs. Depending on what it does, it may use:
- **Canvas API** — for image manipulation (pixel-level access, filters, resizing).
- **Web Crypto API** — native, hardware-accelerated cryptography (AES-GCM, SHA-256, PBKDF2) for any encryption or hashing.
- **pdf-lib / pdf.js** — fully client-side PDF creation and rendering.
- **MediaRecorder API** — for capturing screen, audio, and video.
- **WebAssembly** — for heavy codecs (image compression, media processing).
All of these run inside your browser's sandbox. They cannot access your filesystem (beyond files you explicitly choose), cannot make network requests with your data, and cannot run persistently in the background.
Pro tips for getting the most out of Screen Recorder
- **Bookmark the tool** — it works offline once cached, so you can use it even without a connection.
- **Install EasyFileKit as a PWA** — open the browser menu and choose "Install app" for a standalone window and offline access.
- **Use it on mobile** — every tool is fully responsive and works on phones and tablets, not just desktops.
- **No file size anxiety** — because nothing uploads, you can process large files that server-based tools would reject or charge for.
Try Screen Recorder now
The tool is right above this article — scroll up and start using it. No sign-up, no upload, no limits.
If you found Screen Recorder useful, explore the rest of the Video & Audio Tools suite — there are more tools that work the same private, instant, free way. And if you have a question that isn't covered in the FAQ above, the About page has our contact email.