Free Online Video Tools

Convert, extract audio, and trim — right in your browser. Nothing is uploaded.

Free Online Video Converter — MP4, MKV, WebM, MOV

Convert video formats right in your browser. No upload, no signup, completely free. Files never leave your device.

Convert MP4, MKV, WebM, and MOV files in your browser — no upload, no signup, no cost. Compatible files are remuxed in seconds; when re-encoding is needed, the conversion still runs locally, and the VidMost desktop app can do it far faster.

How to use

  1. Choose your video. Drag a file in or click to select. It stays on your device — nothing is uploaded.
  2. Pick a target format. Choose MP4, MKV, WebM, or MOV. Compatible files convert in seconds.
  3. Download. Your converted file downloads straight from your browser.

Online vs Desktop

FeatureOnlineVidMost Desktop
Max file sizeUp to 1GBUnlimited
Batch conversionOne at a timeYes
Re-encode speedSlower (browser)Hardware-accelerated
CostFreeFree

Video to MP3 — Free Online Audio Extractor

Extract audio from any video to MP3, M4A, or FLAC in your browser. No upload, no signup, free.

Pull the soundtrack out of any video and save it as MP3, M4A, or FLAC — entirely in your browser, with no upload and no signup.

How to use

  1. Choose your video. Drop a video in or click to select. Processing happens on your device.
  2. Pick an audio format. Choose MP3, M4A, or FLAC.
  3. Download the audio. Your audio file downloads directly from the browser.

Online vs Desktop

FeatureOnlineVidMost Desktop
Max file sizeUp to 1GBUnlimited
Batch extractionOne at a timeYes
Output formatsMP3, M4A, FLACAll formats
CostFreeFree

Free Online Video Trimmer — Cut Video in Your Browser

Trim and cut video clips fast, in your browser. No upload, no signup, free.

Cut a clip out of any video in seconds, right in your browser — no upload, no signup. For frame-accurate edits and large files, the VidMost desktop app goes further.

How to use

  1. Choose your video. Drop a video in or click to select.
  2. Set start and end. Enter the start and end time of the clip you want to keep.
  3. Download the clip. The trimmed clip downloads from your browser in seconds.

Online vs Desktop

FeatureOnlineVidMost Desktop
Frame-accurate cutKeyframe-alignedYes
Max file sizeUp to 1GBUnlimited
Batch trimmingOne at a timeYes
CostFreeFree

Frequently asked questions

Is this video converter really free?
Yes. It runs entirely in your browser using WebAssembly — there is no upload, no account, and no cost.
Are my files uploaded to a server?
No. All processing happens locally in your browser. Your video never leaves your device.
What's the file size limit?
Files up to 1GB are supported. For very large files or batch conversion, the VidMost desktop app is faster and has no limit.
How do I convert a video to MP3?
Drop your video in, choose MP3, and click Start. The audio is extracted in your browser and downloads instantly.
Does it upload my video?
No. Everything runs locally in your browser — your file never leaves your device.
Which formats are supported?
Most video and audio inputs work. Output to MP3, M4A, or FLAC.
Is the trim frame-accurate?
The browser trimmer cuts on keyframes for speed, so start/end can be off by a fraction of a second. For frame-accurate cutting, use the VidMost desktop app.
Does it upload my video?
No. Trimming happens locally in your browser.
What if my clip won't trim correctly?
Some videos (long-GOP HEVC) can't be cut precisely by copy. If that happens we'll tell you — the desktop app handles these with frame-accurate cutting.