March 22, 20263 min read
How to Compress Video Online — Reduce Video File Size
Compress video files to reduce size for sharing, uploading, and storage. Free online video compressor supports MP4, AVI, MKV, MOV.
compress video reduce video size video compressor shrink video mp4 compress
Ad 336x280
Reduce Video File Size Without Losing Quality
Videos eating up your storage or too large to share? MyPDF's Video Compressor reduces video file sizes while maintaining watchable quality — ideal for email, social media, messaging apps, and cloud storage.
How to Compress a Video
Step 1: Upload Your Video
Open the Compress Video tool and upload your video file (MP4, AVI, MKV, MOV, WebM, etc.).
Step 2: Choose Compression Settings
- Quality preset: Low, Medium, High (trade-off between size and quality)
- Resolution: Keep original, 1080p, 720p, 480p
- Target size (optional): Specify a maximum file size
Step 3: Download
Download your compressed video.
Compression Results
| Original | Resolution | Compressed | Reduction |
|---|---|---|---|
| 500 MB (4K) | → 1080p | 80-150 MB | 70-85% |
| 200 MB (1080p) | → 720p | 40-80 MB | 60-80% |
| 100 MB (1080p) | Keep | 30-60 MB | 40-70% |
| 50 MB (720p) | Keep | 15-30 MB | 40-70% |
Common Reasons to Compress Videos
- WhatsApp/Telegram — Message apps have file size limits (16-100MB)
- Email — Most email providers cap at 25MB
- Social media — Faster uploads to Instagram, TikTok, YouTube
- Cloud storage — Save space on Google Drive, Dropbox
- Website hosting — Smaller videos load faster for visitors
- Archiving — Reduce storage for old recordings
Tips
- 720p is sufficient for most screens — Most viewers won't notice the difference from 1080p on phones
- Lower resolution = dramatic size reduction — Going from 4K to 1080p can cut size by 75%
- Trim first — Use Video Trim to remove unnecessary parts before compressing
- Convert to MP4 — MP4 with H.264 encoding is the most efficient widely-supported format
Frequently Asked Questions
Does compression affect video quality?
Some quality reduction occurs, but at medium settings it's barely noticeable. Lowering resolution has the biggest impact on both size and perceived quality.What video formats are supported?
MP4, AVI, MKV, MOV, WebM, WMV, FLV, 3GP, and more.Is there a file size limit?
Videos up to 50MB can be uploaded.Is it free?
100% free — no sign-up, no watermarks.Related Tools
- Video Trim — Cut unnecessary parts
- MP4 to MP3 — Extract audio from video
- Convert Video — Change video format
- Resize Video — Change resolution
- Video to GIF — Create animated GIFs from video clips
Ad 728x90