Compress MP4 Online
Reduce the file size of MP4 videos. Adjust quality and resolution, then download a smaller MP4 — no software needed.
Click to upload or drag and drop
MP4 — max 200MB
This compress mp4 helps you reduce file size for uploads, email attachments, web performance, and storage limits. It supports JPG, PNG, WebP images and MP4, MOV, WebM, AVI video files and is ideal for a 500mb phone recording → 80–150mb at balanced quality, a 1080p screen recording → 50–70% smaller at high quality and a 4k clip downscaled to 1080p → 4–6× smaller.
Unlike other tools, ConvertWiki focuses on speed, simplicity, and privacy. Your files are processed quickly and are not stored on any server.
You can use this tool for:
- A 500MB phone recording → 80–150MB at balanced quality
- A 1080p screen recording → 50–70% smaller at high quality
- A 4K clip downscaled to 1080p → 4–6× smaller
How to use this tool:
- Upload your file or paste your content into the tool.
- The tool will automatically process it.
- Download the result instantly — no account required.
Why use ConvertWiki?
Reduce MP4 file size without re-shooting
MP4 is the most common video format, but raw recordings from phones and cameras are often 1–5GB. Re-encoding with H.264 at a higher CRF value reduces file size by 50–80% with minimal visible quality change.
Lowering resolution (e.g. 4K → 1080p) reduces file size even more. For sharing clips online or sending over messaging apps, 720p at balanced quality is usually more than enough.
Typical MP4 compression results
- A 500MB phone recording → 80–150MB at balanced quality.
- A 1080p screen recording → 50–70% smaller at high quality.
- A 4K clip downscaled to 1080p → 4–6× smaller.
Frequently Asked Questions
Up to 200MB per file.
Some quality is lost, but at the default CRF setting the difference is usually not visible at normal screen sizes.
Yes. Choose Original to keep the source resolution, or pick 1080p, 720p, 480p, or 360p.
H.264 video with AAC audio — the most compatible MP4 format for all devices and platforms.
Yes, it is completely free with no signup required.