Video Compressor

For MP4 the slider runs 18 to 34 with 23 as the balanced default; WebM runs 24 to 44 with a default of 33. Lower means better quality and a bigger file. If you don't want to think about it, the High quality, Balanced, and Small file presets pick sensible points on that range.

It takes your target in MB, divides by the clip's duration after trimming, reserves 128 kbps for audio, and sets the video bitrate to land just under the number you asked for. It's the mode to use when a form or platform enforces a hard upload cap.

MP4 with H.264 plays essentially everywhere: phones, editors, PowerPoint, every social platform. WebM with VP9 usually comes out noticeably smaller at matching quality but has patchier support in older software. Default to MP4 for sharing; pick WebM for web embedding.

The encoder is FFmpeg compiled to WebAssembly, and that binary downloads on your first compression, then stays cached. It's the tradeoff for full local processing: one download up front, and afterwards your footage never has to travel to a server.

Yes. There's no sign-up, no upload quota, and no watermark stamped on the output. The practical limits are your browser's memory and your CPU speed rather than a paywall.

There's no enforced cap, but files over roughly 500 MB risk hitting browser memory limits, and the tool warns you at that point. If a big file fails, trim it into sections, lower the Resolution to 720p or 480p, or compress the pieces separately.

The audio track costs 128 kbps here, about 1 MB per minute. On a large high-bitrate video that's pocket change, but when you're squeezing a clip under a 10 MB chat limit, muting hands that entire budget back to the picture.

Entirely on your device. FFmpeg.wasm executes in the browser sandbox, reads the file from local memory, and writes the compressed result back as a download. It even works offline once the engine is cached, which no upload-based mp4 compressor can claim.

It runs in a browser tab, so there's no app to install and the clip never uploads. As an online video compressor it hands the encoding to your own CPU through FFmpeg.wasm, which is why a private recording stays private. A typical video compressor app either uploads to a server or wants install permissions; this one does neither.

Yes. You compress video online free here with no quota counting down and no watermark on the result. Because the work happens on your machine, compress video file online free isn't limited by a server plan, only by your own CPU and memory.

MP4, MOV, WebM, MKV, and AVI all load. Drop any of them and the tool reads the size, duration, and resolution locally before you compress video file online. Whatever goes in, you can export MP4 or WebM, so an MKV can leave as a widely playable MP4.

A higher CRF, a lower resolution like 720p, a reduced frame rate, and muting audio each cut the total. To compress video size online, stack the ones you can spare: dropping 4K to 1080p alone removes most of the pixels. The estimated output box updates as you change each control.

Yes, there's no run limit. You compress video size free again and again, tweaking CRF or resolution between attempts, since nothing is metered. Each pass to compress video size online free just uses your own CPU, so re-running to fine-tune costs nothing.

It depends entirely on the source, so the tool shows an estimate and then the real before-and-after numbers rather than promising a fixed percentage. A clip straight off a phone usually has plenty of room; an already-compressed download has less. To reduce video size free, try Balanced first, check the result, then push CRF higher if you need smaller.

Not literally, since H.264 and VP9 are lossy, but you can get close. To compress video without losing quality you'd notice, keep the CRF low, use the High quality preset, and leave the resolution alone. That way you compress video size without losing quality that's visible at normal viewing distance, even though some data is technically discarded.

Yes, this is it. It works like video compressor software but runs in a browser tab, so there's nothing to install or update. The only download is the one-time FFmpeg engine, after which the video compressor free of installs keeps working, even offline.

Neither. There's no video compressor download to run and no free video compression software to set up; the page is the tool. It fetches a 30 MB engine once on first use, then caches it, so later visits start with nothing sitting in your Downloads folder.

Leave the output format on MP4, which encodes with H.264, and it plays on phones, editors, and every social platform. To compress mp4 video online, pick a CRF and let it re-encode; the result is still an MP4, just smaller. Cutting the compress video file size this way doesn't change how widely it opens.

Because your CPU does the encoding, not a data center. To compress large video the tool reads every frame and re-encodes it, so a long or high-resolution clip takes real minutes. That's the trade for compress large video online free with no upload: you wait on your own hardware instead of handing footage to a server.

No. Free here refers to price, not the encoder; you compress video file free with the same H.264 or VP9 quality a paid app would give you. The CRF slider and target-size mode are both available, so free never means a crippled output.

YouTube re-encodes whatever you send, so the goal is a clean, high-quality source that uploads fast, not the smallest possible file. To compress video for youtube, keep 1080p or higher, use a low CRF like the High quality preset, and export MP4. That uploads quicker without handing YouTube a soft file to re-compress.

Yes. Compresser vidéo is French for compress video, and this is the same in-browser compressor either way. The interface is in English, but the buttons map straight across: Compress video, the CRF slider, and Target size all do what compresser vidéo describes.