Compress Video
Reduce video size on your own device — same sharpness on screen, even for a big file.
About this tool
A 4K phone video quickly outgrows whatever the recipient's mailbox will accept, and every online service that offers to compress video starts by asking you to upload it — which means handing a family video, a filmed meeting or a piece of evidence to a server you know nothing about. Here nothing leaves the tab. Drop the file: the first frame appears as a preview, the current size is shown large, and three quality steps give you an estimate of the result straight away. You see the saving before you start anything, and you choose knowingly between “Lightest” (resolution brought down to 1280 pixels wide), “Balanced” and “High quality”.
Compression is the one genuinely slow job in this category, and it is presented as such rather than hidden behind a spinner. The percentage is real: it is read from the engine's actual position in your video, not simulated. You get the time remaining, the bytes already processed, and you can switch tabs while it works. The codec is H.264 in an MP4 container — the one every phone, TV and player understands — with an AAC audio track and the index moved to the front of the file so playback starts before the download finishes. Past 500 MB an honest warning appears: a browser does not have the memory of a desktop application.
Frequently asked questions
How long does it actually take?
Much longer than installed software, and we would rather say so: the engine runs on a single thread inside the browser. Expect several times the length of the video for 1080p. The tool shows an estimated range before it starts, calculated from your file's real resolution and duration, then a remaining time that sharpens as it goes.
How much smaller will the video get?
Usually 50 to 80%, but it depends entirely on the content. A very static video — a filmed talk, a screen share — compresses enormously; a shot full of movement, grain or foliage resists. The estimate shown before you start is based on resolution, duration and the step you picked. It is an estimate, marked with a “≈”, not a promise.
Will I see the quality drop?
At “Balanced” and “High quality” the original resolution is kept and the loss is hard to spot on screen: that is the whole point of H.264, which mostly throws away what the eye does not register. The “Lightest” step also brings the width down to 1280 pixels, which still looks sharp on a phone or a laptop but shows on a large screen.
What is the maximum file size?
Up to 500 MB everything runs normally. Between 500 MB and 1.5 GB a warning appears: it is possible, but slow and sensitive to how much memory you have free. Above 1.5 GB the tool refuses, because it would fail anyway — better to split the video first with the Video Cutter, then compress each piece.
Is it really free, with no sign-up?
Yes — the tool is free, needs no account and has no usage limit. Processing happens locally in your browser, so your data never leaves your device.