Compress Video
Shrink a video's file size.
Shrink a video's file size.
How to use Compress Video
- Upload the video you want to shrink
- Choose how hard to compress it
- Download the smaller re-encoded MP4
About Compress Video
Compress Video shrinks the file size of a video right in your browser, so a clip that was too big to email, upload or drop in a chat becomes small enough to send. Load the file, choose how hard to compress, and download a smaller MP4 in a click — no account, no watermark, and nothing is uploaded. It handles both short clips and full-length videos, including the .mov and .mp4 files your iPhone or Android phone records.
Because it runs in your browser, there is no program to install and no software to sign up for — it works the same on Windows, Mac, or a phone browser, so it's an easy stand-in for a desktop tool like HandBrake when you just need one video smaller fast. Under the hood it uses an in-browser build of ffmpeg and re-encodes with H.264, so the result plays anywhere. Pick "Smallest file" to squeeze the size down hardest, "Balanced" for a sensible default, or "Higher quality" to keep more detail. Compression is lossy, so a stronger setting trades a little quality for a much bigger reduction in size — useful when you're up against an email attachment limit or an upload cap.
The fastest way to hit a limit is Target file size mode: type the megabytes you need — or tap a preset like 10 MB for a chat app or 25 MB for email — and the tool reads the clip's length, works out the bitrate to bring it in under that size, and undershoots slightly so it clears hard caps like Discord or WhatsApp. Prefer to protect detail instead? Switch to Quality level mode and pick Higher quality to compress with the least visible loss. Either way the output is a standard H.264 MP4 that plays everywhere.
The first run downloads a one-time processing engine, then caches it so later compressions start instantly. Everything happens on your own device: your video never leaves your computer or phone, and no copy is stored on a server. In-browser encoding is slower than a desktop app and very long or high-resolution clips use more memory, so it shines on the everyday phone clips and short videos most size limits are about.
Frequently asked questions
- Is it free to use?
- Yes — completely free, with no sign-up, no watermark and no limits.
- Is my video uploaded to a server?
- No. It runs an in-browser build of ffmpeg, so your video is processed entirely on your own device and never uploaded.
- Do I need to install a program or software?
- No. It runs entirely in your browser, so there's nothing to download or install. Open the page, choose your video, and compress it right there on Windows, Mac, or a phone.
- Is this like HandBrake, or a good alternative to it?
- It's a lightweight, online alternative for the common task of making a video smaller. Like HandBrake it re-encodes with H.264, but it runs in the browser with no install, so it's quicker when you just need one clip compressed and don't want to set up a desktop program.
- How do I compress a video to a specific size like 25MB or under 10MB?
- Switch to Target file size mode and enter the megabytes you need — or tap a preset for 8, 10, 16, 25 or 50 MB. The tool reads your video's length, works out the bitrate that fits that budget, and re-encodes to land just under it. It deliberately undershoots a little so the file clears hard limits like a 25MB email attachment or a chat app's cap. This makes it a fast way to compress a clip for email, Discord or WhatsApp without guessing.
- How do I compress a video?
- Choose your video file, pick a compression level ("Smallest file", "Balanced", or "Higher quality"), and let it process. When it finishes, download the smaller MP4. That's the whole flow — no settings to configure beyond the quality level.
- How do I compress a video from my iPhone?
- Save the clip to your phone, then open this page in Safari or Chrome and select that video. It accepts the .mov and .mp4 files iPhones record and gives you back a smaller MP4 that still plays in Photos. Very large 4K clips process faster if you move them to a laptop first.
- How do I make a video small enough to email or upload?
- Use Target file size mode and set the limit you're up against — for example 25 MB for a Gmail attachment or 16 MB for a WhatsApp video — and the tool compresses to land just under it. If you'd rather steer by quality, Balanced then Smallest file in Quality mode also works; each step trades a little detail for a much smaller file.
- Can I compress a short video clip?
- Yes. Short clips work well and finish quickly, since there's less footage to re-encode. Longer videos take proportionally more time but use the same one-click process.
- How much smaller will the file be?
- It depends on the video and the setting you pick. "Smallest file" compresses hardest, "Balanced" is a good default, and "Higher quality" keeps more detail. Videos that were only lightly compressed to begin with shrink the most.
- What format do I get back?
- An MP4 encoded with H.264, which plays on virtually any phone, computer, or app without extra software. Whatever common format you start with, the download is a standard MP4.
- Will compressing reduce the quality?
- Some, yes — video compression is lossy. The default is tuned to be hard to notice on everyday clips; choose "Higher quality" if you want to keep more detail.
- Why does the first run take a moment?
- The first time, it downloads a ~32 MB processing engine. That's cached afterwards, so later runs start instantly.