Is my recording data truly private and secure?

100% yes. This tool uses local browser technology to encode video entirely on your device. Recordings are held in temporary memory and never touch our servers. When you download, the file goes straight from your browser to your file system. We cannot see, access, or collect your recordings.

What's the difference between MP4 and WebM formats?

MP4 (H.264/AAC codec) offers universal compatibility - works on all devices, video editors, and platforms (YouTube, social media). WebM (VP9/Opus) provides better compression (smaller file sizes) and is optimized for web playback but has limited support in some video editors. Choose MP4 for maximum compatibility, WebM for web-first workflows.

How much storage space do recordings use?

File size depends on your custom bitrate setting. 1080p: 4-12 Mbps (30-90 MB per 10 min) | 720p: 2.5-8 Mbps (19-60 MB per 10 min) | 480p: 1-4 Mbps (8-30 MB per 10 min). Default presets use middle values (8 Mbps/5 Mbps/2.5 Mbps). Actual sizes vary based on content—high-motion video uses more, static presentations use less. Adjust bitrate slider to optimize quality vs. file size for your needs.

Why can't I record Netflix, Hulu, or DRM-protected content?

Browsers block screen recording of DRM-protected video streams to prevent piracy. When you try to record a Netflix tab, the video area will appear black/blank even though you see it normally. This is a browser security feature, not a limitation of this tool. You can still record non-protected content like YouTube (without Premium DRM), tutorials, or your own videos.

What do the content hint options actually do?

Content hints tell the video encoder how to prioritize quality: Motion optimizes for fast movement (gameplay, action videos) by prioritizing temporal encoding. Detail preserves sharp edges and text (presentations, code editors) with spatial encoding. Text maximizes readability for screen recordings with lots of text. Auto lets the encoder decide. Choose based on your primary content type for best results.

Can I pause and resume recordings without losing data?

Yes! Click 'Pause Recording' to freeze the video capture. The timer stops, and no new frames are encoded (saving CPU and memory). Click 'Resume Recording' to continue from where you left off. All progress is kept in your browser memory until you stop and download.

Why is my recording quality lower than expected in 1080p?

Several factors affect quality: 1) Source resolution - if your display is 1080p, recording at 1080p captures native pixels, but upscaling from 720p looks blurry. 2) Content hint mismatch - using 'Motion' for static slides wastes bitrate. 3) Browser tab recording may downscale high-DPI displays. 4) Codec support - Safari only supports H.264, which has lower quality than VP9 at the same bitrate.

What happens if my browser crashes during a long recording?

Because recordings are processed entirely in your browser memory to ensure 100% privacy and speed, a browser crash or page refresh will clear the current recording session. We recommend keeping sessions under 2 hours and ensuring a stable environment for long recordings.

Private Screen
Recorder

Record your screen with 100% privacy. Capture full screen, browser tabs, or windows in MP4/WebM. Adjustable quality presets with custom bitrate control (1-12 Mbps). All data stays local.

Recording Mode

Quality Settings

Output Format

MP4

Best compatibility

WebM

Web standard

Quality Preset

Custom Bitrate 8.00 Mbps

Video Content Hint

Ready to Record

Click the button below to start recording your screen

Private Screen Recording
100% Local & Secure

Record your screen with complete privacy. No uploads, no cloud storage, no tracking—everything stays on your device. Choose between MP4 (universal compatibility) or WebM (superior compression) formats.

Capture full screen, browser tabs, or specific application windows in 1080p, 720p, or 480p quality. Fine-tune your bitrate from 1-12 Mbps for optimal file size control. Efficient in-memory processing ensures high performance recording.

How Screen Recorder Works

Simple Steps:

1Select recording mode: Full Screen (entire display), Browser Tab (single tab), or Application Window (specific app)
2Choose video format (MP4 for compatibility, WebM for compression), quality preset (1080p/720p/480p), and adjust custom bitrate (1-12 Mbps) to balance quality vs. file size
3Set content hint: Motion (gameplay/videos), Detail (presentations), Text (code/documents), or Auto
4Click 'Start Recording' and select the screen/tab/window to capture in the browser picker
5Use Pause/Resume controls as needed. Click 'Stop Recording' to finalize, then download your video file

Pro Tips:

All recordings are 100% private - zero data leaves your device or browser
MP4 format offers best compatibility across devices and video editors
WebM format provides superior compression for web-based workflows
Adjust custom bitrate to balance quality vs. file size: lower = smaller files, higher = better quality
Recordings are processed locally in your browser memory for maximum performance
Choose "Motion" content hint for gameplay/videos, "Detail" for presentations

Common Use Cases

Software Tutorials & Documentation

Record step-by-step software walkthroughs with audio narration. Capture entire screen or specific application windows to create training materials without expensive screen recording software.

Example:

Tutorial creators recording multi-monitor setups in 1080p with detail optimization

Bug Reports & Technical Support

Show developers exactly what went wrong by recording browser tabs or application windows. Include audio commentary to explain the issue while demonstrating the bug in real-time.

Example:

QA teams capturing reproducible bugs with system audio and voiceover

Meeting & Presentation Recording

Archive important video calls, webinars, or live presentations. Record specific browser tabs (Zoom, Meet, Teams) without capturing your entire desktop - perfect for privacy-conscious recording.

Example:

Remote teams recording standups and client presentations locally

Gaming Highlights & Streaming Clips

Capture gameplay moments without relying on cloud-based services. Use "Motion" content hint and adjust bitrate (4-12 Mbps for 1080p) to preserve fast-action sequences in competitive games while controlling file size.

Example:

Streamers recording 1080p@30fps gameplay with 10 Mbps bitrate for YouTube montages

Design Portfolio & Creative Work

Showcase your design process by recording UI/UX workflows, digital art creation, or video editing sessions. "Detail" content hint preserves fine lines and text clarity.

Example:

Designers capturing Figma/Photoshop workflows for portfolio case studies

Privacy-First Sensitive Recording

Record confidential work (financial data, medical records, legal documents) knowing data never touches external servers. All processing happens locally - perfect for HIPAA/GDPR compliance scenarios.

Example:

Healthcare professionals recording EMR system training without PHI exposure

Frequently Asked Questions

🔧Technical Details & Recording Architecture

Recording Pipeline Architecture

Data Flow:

Capture → Processing → Encoding → Secure Buffer → Final File → Download

100% client-side | Zero uploads | Private by design

Your browser captures and encodes the recording in real time using built-in capabilities. Data remains local and is assembled into a single downloadable file when you stop the recording.

Pipeline Stages:

1Capture: Select a screen, tab, or window to record
2Process: Frames are optimized for clarity and motion
3Encode: Video is compressed into your chosen format
4Buffer: Data is kept locally during the session
5Finalize: A single file is created when you stop

Example Recording (10 min):

Settings:

• Format: MP4 (H.264/AAC)
• Quality: 1080p @ 8 Mbps
• Content: Detail (presentation)

Processing:

Raw data: ~9,600 MB (uncompressed)

Compressed: ~600 MB (final video)

Buffered locally during the session

Final File:

~600 MB MP4 video

Video Codec Selection (MP4 vs WebM)

Codec Negotiation Logic:

MP4: Try H.264 (AVC) → Fallback to browser default

WebM: Try VP9 → Fallback to VP8

Audio: AAC (MP4) | Opus (WebM)

📦 MP4 (H.264/AAC)

Best For:

Universal playback, social media, video editing

Compatibility:

All devices, browsers, and editors (Premiere, Final Cut)

File Size:

Moderate (~60 MB per 10 min @ 1080p)

Quality:

Excellent at 8+ Mbps bitrate

🌐 WebM (VP9/Opus)

Best For:

Web playback, archival, storage-constrained devices

Compatibility:

Modern browsers, some editors (DaVinci Resolve)

File Size:

30-40% smaller than MP4 (VP9 compression)

Quality:

Superior at same bitrate as H.264

💡Correct content hints can significantly reduce file size while improving perceived quality.

Quality Presets & Bitrate Allocation

Bitrate Calculation & Custom Control:

File Size (MB) ≈ (Bitrate × Duration) ÷ 8,000,000

1080p @ 4 Mbps × 600s ÷ 8M = 300 MB per 10 min (low)

1080p @ 8 Mbps × 600s ÷ 8M = 600 MB per 10 min (default)

1080p @ 12 Mbps × 600s ÷ 8M = 900 MB per 10 min (high)

Custom Bitrate Control: Fine-tune bitrate within preset bounds. 1080p: 4-12 Mbps | 720p: 2.5-8 Mbps | 480p: 1-4 Mbps. Higher bitrate = better quality but larger files.

📺 1080p (Full HD)

Resolution:

1920×1080 pixels

Bitrate Range:

4-12 Mbps (default: 8 Mbps)

File Size:

30-90 MB / 10 min

📱 720p (HD)

Resolution:

1280×720 pixels

Bitrate Range:

2.5-8 Mbps (default: 5 Mbps)

File Size:

19-60 MB / 10 min

💾 480p (SD)

Resolution:

854×480 pixels

Bitrate Range:

1-4 Mbps (default: 2.5 Mbps)

File Size:

8-30 MB / 10 min

Bitrate Selection Guide:

✓1080p: Professional tutorials, portfolio work, high-quality archival

✓720p: General screen recording, presentations, bug reports

✓480p: Quick demos, storage-constrained devices, long recordings

Content Hints & Encoding

Motion Hint

Prioritizes frame rate and fluid movement updates. Best for video playback or gaming.

Detail Hint

Prioritizes resolution and edge sharpness. Best for text, code, or detailed diagrams.

Text Hint

Optimizes specifically for high-contrast text rendering to prevent compression artifacts around letters.

Auto Hint

Allows the browser's encoder to dynamically adjust settings based on analyzed content.

💡Correct content hints can significantly reduce file size while improving perceived quality.

Browser Compatibility & Limitations

✓ Fully Supported Browsers:

•Chrome/Edge (v94+): Full support for MP4 (H.264) and WebM (VP9) with all content hints
•Firefox (v91+): WebM (VP9) preferred, MP4 (H.264) available but may require software encoding
•Safari (v14.1+): MP4 (H.264) only - WebM format automatically falls back to MP4

⚠ Known Browser Limitations:

•Safari Tab Recording: May downscale high-DPI displays (Retina screens recorded at 1× instead of 2×)
•Firefox Hardware Encoding: H.264 may use software encoder on Linux (higher CPU usage)
•Chrome Tab Audio: "System Audio" option may not work on macOS (Chrome security restriction)
•All Browsers: Cannot record DRM-protected content (Netflix, Hulu, Disney+, etc.)

✗ Not Supported:

•Mobile browsers (iOS Safari, Chrome Mobile) - screen recording not supported
•Internet Explorer or Edge Legacy (pre-Chromium)
•HTTP sites (tool requires HTTPS for security APIs)

🌐 Compatibility Notice: This tool uses modern web APIs (WebCodecs, IndexedDB, MediaStream) that require up-to-date browsers. For best results, use Chrome 94+, Edge 94+, or Safari 14.1+. Firefox users should prefer WebM format. Mobile recording is not supported due to browser API limitations.

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Private ScreenRecorder

Recording Mode

Full Screen

Browser Tab

Application Window

Quality Settings

MP4

WebM

Auto

Motion

Detail

Text

Ready to Record

Private Screen Recording 100% Local & Secure

How Screen Recorder Works

Simple Steps:

Pro Tips:

Common Use Cases

Software Tutorials & Documentation

Bug Reports & Technical Support

Meeting & Presentation Recording

Gaming Highlights & Streaming Clips

Design Portfolio & Creative Work

Privacy-First Sensitive Recording

❓ Frequently Asked Questions

🔧Technical Details & Recording Architecture

Recording Pipeline Architecture

Data Flow:

Pipeline Stages:

Example Recording (10 min):

Video Codec Selection (MP4 vs WebM)

Codec Negotiation Logic:

📦 MP4 (H.264/AAC)

🌐 WebM (VP9/Opus)

Quality Presets & Bitrate Allocation

Bitrate Calculation & Custom Control:

📺 1080p (Full HD)

📱 720p (HD)

💾 480p (SD)

Bitrate Selection Guide:

Content Hints & Encoding

Motion Hint

Detail Hint

Text Hint

Auto Hint

Browser Compatibility & Limitations

✓ Fully Supported Browsers:

⚠ Known Browser Limitations:

✗ Not Supported:

Related Media Tools

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Private Screen
Recorder

Private Screen Recording
100% Local & Secure

Frequently Asked Questions