Free Tool
Compress video files for email, social, and sharing
Reduce video size by 50–90% with quality presets — free, no upload.
The problem
Large video files fail email attachment limits (typically 10–25 MB), take too long to upload to social platforms, and eat up storage. Cloud compression tools upload your file and have size or duration limits. Local software is complex to set up.
The NSS solution
NSS Video Compressor re-encodes your video using your browser's VP9 encoder with a configurable bitrate target. Choose High (minimal loss), Medium (balanced), Low (small file), or Very Low (maximum compression). Download the result instantly.
How to use it
- 1
Reduce for email attachments
Email clients typically limit attachments to 10–25 MB. Compress to "Low" quality to get under the limit while keeping the video watchable.
- 2
Shrink before social upload
Instagram, TikTok, and LinkedIn have file size and bitrate limits. Compress before uploading to avoid re-encoding by the platform.
- 3
Free up device storage
Screen recordings and phone videos accumulate quickly. Batch-compress to Very Low quality for archival copies that take a fraction of the space.
Step-by-step guide
- 1
Choose a quality preset
High keeps most quality. Medium gives a good size/quality balance. Low and Very Low are for when size is the only priority.
- 2
Upload your video
The video plays through at real time while being compressed. One minute of video takes about one minute.
- 3
Compare sizes and download
The result shows before/after file size and the percentage reduction. Download if satisfied.
Common questions
What quality settings should I use for email?
Try "Low" first (600 Kbps target, ~75% reduction). If the quality is still acceptable, use it. For very long videos, "Very Low" may be needed to get under the limit.
Will compression affect video resolution?
No — the dimensions stay the same. Only the bitrate (and therefore quality) changes.
Is the video uploaded to a server?
No. All compression uses your browser's built-in VP9 encoder and runs entirely locally.
Ready to try it?
No account. No subscription. No images uploaded to any server.
Compress video free→