Is this video compressor free to use?

Yes, completely free — no account, no subscription, no watermark, no hidden fees. Just open the page and compress.

Is my video uploaded to a server? Is it private?

Your video is never uploaded. All compression runs in your browser using ffmpeg.wasm — the video stays on your device at all times and is never sent to any server.

Is there a file size limit? Why is compression slow for large videos?

There is no hard upload limit since nothing is uploaded. However, because ffmpeg.wasm runs on your device's CPU inside the browser, large files (over ~200 MB) or long videos can take several minutes. For best speed, use it on short clips.

What is the output format?

The output is always an MP4 file encoded with H.264 video, compatible with virtually all devices, browsers, and video players.

Does the video compressor work on mobile?

Yes, it runs on modern mobile browsers. Keep in mind that mobile CPUs are slower than desktops, so compression will take longer — especially for larger files. Short clips work best on mobile.

🎬 Video Compressor — Free Browser-Based MP4, No Upload

Reduce your video file size instantly and for free — your video is processed entirely in your browser using ffmpeg.wasm and is never uploaded to any server. Choose from 3 quality levels and download a compressed MP4 in seconds. Looking for a free Clideo alternative? Toolio’s version is completely free and needs no sign-up.

Video compression re-encodes a video to shrink its file size, making it easier to send, upload or store while keeping it watchable.

Choose a video (MP4, WebM, MOV…)

Compression

Private by design. This tool runs entirely in your browser — nothing you enter is uploaded or stored, and it works offline.

About

This video compressor runs ffmpeg.wasm — a full port of FFmpeg compiled to WebAssembly — directly inside your browser tab. Your video file never leaves your device: there is no upload, no cloud processing, and no server that ever sees your footage. The output is a standard H.264 MP4, widely supported across all devices and platforms. Three quality presets (High, Medium, Low) let you balance file size against visual quality. Because compression happens on your CPU inside the browser, large or long videos will take more time than a native app; for best results use it on short clips or clips under ~200 MB. The tool works fully offline once the page is loaded.

How to use

Click "Choose Video" and select the video file you want to compress from your device.
Choose a quality level — High (best quality, larger file), Medium (balanced), or Low (smallest file).
Click "Compress" and wait while ffmpeg.wasm processes the video entirely in your browser.
Preview the compressed video and compare the new file size shown on screen.
Click "Download" to save the compressed MP4 to your device.

FAQ

Is this video compressor free to use?: Yes, completely free — no account, no subscription, no watermark, no hidden fees. Just open the page and compress.
Is my video uploaded to a server? Is it private?: Your video is never uploaded. All compression runs in your browser using ffmpeg.wasm — the video stays on your device at all times and is never sent to any server.
Is there a file size limit? Why is compression slow for large videos?: There is no hard upload limit since nothing is uploaded. However, because ffmpeg.wasm runs on your device's CPU inside the browser, large files (over ~200 MB) or long videos can take several minutes. For best speed, use it on short clips.
What is the output format?: The output is always an MP4 file encoded with H.264 video, compatible with virtually all devices, browsers, and video players.
Does the video compressor work on mobile?: Yes, it runs on modern mobile browsers. Keep in mind that mobile CPUs are slower than desktops, so compression will take longer — especially for larger files. Short clips work best on mobile.

Read the guide