Video Compressor | Free Online MP4 Size Reducer





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Free Video Compressor

Reduce MP4 & WebM video file size online for free. Everything happens in your browser — your video is never uploaded to any server. No watermark, no limits.

Quick answer: A video compressor shrinks file size by re-encoding with efficient codecs and lowering bitrate or resolution. For example, a 500 MB 1080p clip can drop to around 80 MB at 720p with barely visible quality loss. Our free online compressor runs entirely in your browser, so your videos are never uploaded — it's private and works offline after loading.
Last updated: October 18, 2026 · Free forever, no signup required
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Drop a video here or click to choose
MP4, WebM up to ~500MB • works best in Chrome

⚠️ Compression runs in real time (a 60-second video takes ~60 seconds). Audio is kept as-is. For the smallest files choose Low quality + 480p.

How to Use the Video Compressor in 3 Steps

  1. Drag your video file into the upload box or click to browse.
  2. Choose a target size or quality level — for example, 720p for WhatsApp sharing.
  3. Click Compress, wait for the progress bar, then download your smaller video.

Frequently Asked Questions

Will compressing reduce my video quality?

Slightly, but a good compressor keeps the loss nearly invisible. Modern codecs like H.264 and VP9 remove redundant data first, so dropping a 500 MB file to 100 MB at the same resolution often looks identical on phones. Only aggressive compression — like halving the resolution — shows visible softness. Preview before downloading to find your sweet spot.

Which video formats can I compress?

Our tool handles MP4 (H.264), WebM, and MOV files — the formats most phones and cameras produce. Output is MP4 or WebM, which play everywhere including WhatsApp, YouTube, and all browsers. If your file is AVI or MKV, convert it to MP4 first with our converter for the smallest result.

Is there a maximum file size?

Because compression happens in your browser, the practical limit is your device's memory — files up to 1–2 GB work on most desktops, while phones handle a few hundred MB comfortably. There is no upload queue or daily cap, unlike many online tools that limit you to 500 MB or a few files per day.

How small can I make a video for WhatsApp?

WhatsApp caps videos around 16 MB for direct sending (up to 2 GB as a document). Our compressor's target-size mode is perfect here: set 15 MB and it picks the right bitrate automatically. A 2-minute 1080p clip usually compresses to under 15 MB at 720p with perfectly watchable quality.

Are my videos uploaded to a server?

No. Compression runs entirely in your browser using your device's processor — you can verify this by watching your browser's Network tab during compression. Nothing is uploaded, stored, or seen by anyone. This also means it works on private or sensitive footage without any privacy worry.

How long does compression take?

It depends on file size, resolution, and your device speed. A 100 MB clip typically takes 1–3 minutes on a modern laptop, longer on phones. Higher compression settings take more time because the encoder works harder. You will see a live progress bar, and you can keep the tab open while it works.