Quick answer: To compress a 4K video, open it here: the page is set to High quality with a 1080p maximum, which usually makes a 4K phone clip several times smaller with no visible loss on phones and laptops. At 30 fps that is roughly 45 MB per minute of video. It runs in your browser and nothing is uploaded.
4K clips are enormous and most people watch them on a phone or laptop anyway. Scale them to Full HD at high quality and the file gets many times smaller while still looking sharp on almost every screen.
Compress 4K video at a glance
| Price | Free, no sign-up, no watermark, no daily limit |
|---|---|
| Accepts | MP4 · MOV · WebM · MKV |
| Largest file | 2 GB per file |
| Where it runs | In your browser: files are never uploaded |
| Works on | Chrome and Edge, Safari 17+, Firefox 130+ on iPhone, Android, Windows, Mac and Linux |
| Send the result | Download it, or send it free with a link or by email (up to 20 GB) |
How to compress 4K video
- Choose the 4K video: from an iPhone, an Android phone, a drone or an action camera.
- Keep High quality and 1080p, or pick 1440p to keep more detail or Balanced for a smaller file.
- Check the estimated size, then press Compress 4K video.
- Download the 1080p MP4, or send it with a link.
Why 1080p is the sweet spot
A 4K frame has four times the pixels of a 1080p frame, and the camera spends a very high bitrate on them. On a phone screen, a laptop or a TV viewed from the sofa, a well-encoded 1080p copy looks the same. Scaling down before compressing means every megabit goes into fewer pixels, so the result stays clean where squeezing 4K to the same size would look blocky.
| Setting on this page | Picture | Typical size per minute |
|---|---|---|
| 1080p, High (default) | Indistinguishable on most screens | about 45 MB at 30 fps |
| 1080p, Balanced | Very good | about 25 MB at 30 fps |
| 1440p, High | More detail for big monitors | about 75 MB at 30 fps |
60 fps clips need more, and the tool never aims above the source bitrate. The exact estimate for your clip appears under the options.
HDR and HEVC clips from iPhone
iPhones record 4K in HEVC, often as HDR (Dolby Vision). Decoding HEVC needs a browser that supports it: Safari, or Chrome and Edge on Windows and macOS. The result is a standard H.264 MP4, which plays everywhere; HDR highlights are shown in standard range, so very bright skies can look a little flatter than on the iPhone.
Keep the 4K original for editing
Compressing throws detail away for good. If the footage is going to an editor, a client or a stock site, send the original 4K file instead: share it with a link, free up to 20 GB. See how to send 4K video.
How this compares
| This tool | Online converters (e.g. Clideo, FreeConvert or CloudConvert) | Desktop apps (e.g. HandBrake) | |
|---|---|---|---|
| Your file is uploaded | No | Yes, to their servers | No |
| Install or account | None | Account for some features | Install needed |
| Watermark or daily limits | None | Common on free plans | Depends on the app |
Plans of other services change; check their sites. More video tools.
Frequently asked questions
How much smaller does a 4K video get?
Usually several times smaller. Phone cameras record 4K at a very high bitrate, and a 1080p copy at High quality needs only a fraction of it. The page shows the estimate for your clip.
Will I see a difference?
On phones, laptops and most TVs, no. On a large 4K monitor up close you may notice less fine detail; choose 1440p if that matters.
Can I keep it in 4K and just compress it?
Yes. Set Maximum resolution to 4K (2160p) or Keep original. The file shrinks less, because every 4K frame still needs a lot of data.
How long does a long 4K clip take?
It depends on your device. With hardware acceleration a laptop often works faster than real time; an older phone is slower. Keep the tab open until it finishes.
Is my video uploaded?
No. It is decoded and encoded by your own browser.
Need to send a big file?
Send files up to 20 GB with a download link or by email. Free, no account needed, original quality.
Send large files free