Compress video to under 20 MB.
Target a 20 MB file size limit for uploads, messaging, and platforms. WebCodecs hardware encoding runs on your device without server uploads.
Compress video to under 20 MB?
Target a 20 MB file size limit for uploads, messaging, and platforms. WebCodecs hardware encoding runs on your device without server uploads. ✓ Bitrate targeting: Calculates optimal video bitrate based on total clip duration to aim under 20 MB ✓ Resolution ladder: Scaled down if needed (1080p, 720p, 480p) to keep high visual quality per pixel
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Target size math and encoding mechanics
How the compressor aims for a 20 MB target:
- Bitrate targeting: Calculates optimal video bitrate based on total clip duration to aim under 20 MB
- Resolution ladder: Scaled down if needed (1080p, 720p, 480p) to keep high visual quality per pixel
- Audio preservation: Keeps audio clear at standard bitrates while budgeting byte allowance
- No watermark, no upload, no signup
Encoding precision and margin:
- Single-pass video encoding has natural bitrate variance depending on motion complexity
- For strict 20.0 MB boundaries, starting at 19 MB provides a safe margin for container overhead
- If a high-motion clip lands slightly over 20 MB, simply drop the target by 1 MB and re-run
How to hit the 20 MB target
Select your video
Drop your video into the compressor.
Target set to 20 MB
The engine sets bitrate budgets based on clip duration.
Encode locally
Process the clip in seconds using your device hardware.
Check output size
Confirm the exported file size in your file manager.
Compression Architecture
Our video compressor utilizes browser-native WebCodecs with hardware fallback paths. Read our video compression guide for full technical details.
Read Video Compression Architecture GuideFrequently Asked Questions
Why is 20 MB a common target?
20 MB is the standard upload limit on several messaging platforms, email clients, and forum software.
What happens if my video ends up at 20.2 MB?
Because single-pass encoding estimates bitrate, complex scenes can occasionally cause minor variance. If so, simply set the target to 19 MB and compress again.
Does compressing to 20 MB reduce video duration?
No. The video duration is preserved completely; only the bitrate and resolution are adapted.