Compress MP4 Online — Shrink Video File Size
Compress MP4 videos with H.265 encoding and quality presets — up to 50% smaller at the same quality. Optional downscaling for even more savings. Processed locally in your browser.
Try it Now →Why Choose Formavide?
- Privacy First: All tools run locally in your browser — files are never uploaded.
- No Sign-Up: Open your browser and start. No account needed.
- Free to Use: Basic features are always free.
- Cross-Platform: Chrome, Edge, Safari, and mobile.
How to Use
- Upload the MP4 you want to shrink (up to 500MB).
- Pick H.265 as codec and "High" quality (smallest at the same visual quality).
- For big savings, downscale 1080p to 720p — cuts size by half or more.
- Click convert. Processing runs in your browser — nothing uploads.
- Compare before/after sizes and download the compressed MP4.
FAQs
How much smaller can an MP4 get?
It depends on the source: re-encoding H.264 to H.265 at the same quality typically saves 30-50%; dropping 1080p to 720p saves another 50%+.
Will compression visibly hurt quality?
With H.265 at "High" quality, the difference is nearly invisible. The "Low" preset shrinks further — fine for shareable previews, with slight detail loss.
What about files over 500MB?
Local mode supports up to 500MB. For larger videos, use a desktop browser — H.265 compression works there too.
Is compression free?
Local compression is completely free and unlimited.
Will H.265 play on all devices?
Most phones, computers, and TVs from 2016 onward support H.265. For recipients on older devices, choose H.264 — the safest compatibility, at slightly larger sizes.