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Compress Video Online — Private, Free, No Upload

Compress video online without uploading it anywhere — your file is processed right in your browser at hardware speed, so there is no upload wait and no server ever sees it. Pick a quality preset, or switch to a target like 8MB for Discord or 25MB for Gmail and the tool lands just under it automatically. Free, no watermark, no signup.

  • No upload — files stay on your device
  • Works offline once loaded
  • Free forever, no signup, no watermark
Drop a video here, or tap to choose MP4, MOV, WebM or MKV — it never leaves your device
  • Size {{ sourceSizeLabel }}
  • Duration {{ durationLabel }}
  • Resolution {{ meta.width }}×{{ meta.height }}
  • Audio {{ meta.hasAudio ? 'Yes' : 'None' }}

This is a large file (over 500 MB). It will still work — everything streams from disk — but expect the encode to take a while, especially on a phone. Keep this tab in the foreground until it finishes.

Target size

The result is aimed a few percent under this number so it clears the platform limit.

≈{{ estimate.kbps }} kbps of video for this length — quality: {{ estimate.grade }}

Quality
{{ progressLabel }}
Preview
  • Before {{ sourceSizeLabel }}
  • After {{ resultSizeLabel }}
  • Saved {{ savedPercent }}%

✓ Landed under {{ targetMb }} MB.

{{ resultNote }}

On iPhone: after tapping Download, use Share → Save Video.

How to use this tool

  1. Drop your video

    MP4, MOV, WebM or MKV — the file is read straight from disk, nothing is uploaded, and you see its size, duration and resolution instantly.

  2. Pick a quality or a size target

    Choose High, Medium or Small quality, or switch to Target size mode and pick 8MB, 10MB, 16MB, 25MB, 50MB or a custom number.

  3. Compress and download

    Watch the progress bar, compare the before/after sizes, preview the result, and download your MP4.

Questions people ask

How do I compress a video without losing much quality?

Use the High quality preset — it re-encodes with a modern bitrate that typically halves the file size of phone and camera footage with barely visible loss. If you need a specific number of MB instead, use Target size mode.

Is there a file size limit?

There is no hard cap because the file streams from disk instead of loading into memory. On phones we recommend staying under roughly 500 MB so the encode stays quick.

Why is this faster than online video compressors?

Server-based compressors spend most of their time uploading your file and queuing it. Here there is no upload at all — compression starts immediately and runs on your device's hardware encoder, the same chip your camera app uses.

Is my video uploaded to a server?

No. Everything runs in your browser using your device's own hardware video encoder (WebCodecs). This site has no upload endpoint for the tool at all — the video never leaves your device, and there is no upload wait before compression even starts.

Does compressing a video reduce quality?

Yes — a smaller file means less data. The tool keeps quality as high as the target allows by downscaling resolution intelligently instead of just starving the bitrate, and it shows you an honest quality estimate before you run.

What video formats can I compress?

MP4, MOV, WebM and MKV in; MP4 (H.264 + AAC) out — the most compatible format for every platform and player.

Which browsers does this work in?

Chrome and Edge (desktop and Android) have full hardware encoding support. Firefox and older Safari versions may lack the WebCodecs encoder — the tool detects this and tells you plainly instead of spinning forever.

Related tools

Free because it costs us nothing to run: your browser does the work, not our servers. Made by Dynamb Technologies — we build software for businesses.