Free Online Video Converter

Change video formats locally for playback, editing, archiving, or web publishing. Pick the output container, resolution, and quality level before conversion starts.

Drag & Drop Your Video

or click to browse — any video format

Output Format
Quality (CRF)
Trim (optional)

Different jobs need different video formats. MP4 is the safest choice for playback, WebM is useful for websites, MOV fits many Apple editing workflows, AVI helps with older Windows tools, and MKV is common for archives. This converter is the general-purpose page for switching between those output formats without installing desktop software.

The tool uses FFmpeg in WebAssembly, so conversion happens on your device after the page loads. You can keep the original resolution or downscale to reduce file size, choose a quality preset, and trim a time range before export. Re-encoding is normal when changing codecs, so High is best for footage you want to keep, Medium is a balanced default, and Low is for quick sharing where small files matter more than detail.

Browser conversion is convenient, but it still uses your CPU and memory. Short clips usually finish quickly; long 4K videos can take several minutes and work best on desktop Chrome, Edge, or another modern browser with enough RAM. If a file fails, the usual causes are unsupported codec combinations, very large source files, or a browser tab running out of memory.

Why Use This Video Converter

Every Major Format

Output to MP4 (H.264), WebM (VP9), MOV, AVI, and MKV. Each format gets optimized encoder settings for the right balance of quality and file size.

Resolution Control

Set the output resolution from 360p to 1080p, or keep the original. Handy when you need a specific size for a platform or device.

Quality Presets

Three settings — Low, Medium, High. Pick Low when you want a quick share. Pick High when you want to keep the details.

Trim What You Need

Only want a clip? Set start and end times to extract just the part you need. Saves time and keeps output sizes small.

Stays on Your Device

Your videos never touch a server. Everything processes in your browser. No uploads, no privacy worries, nothing leaves your machine.

No Limits

No daily caps, no watermarks, no signup. Convert as many videos as you want, whenever you want.

Features

  • Convert between five output formats: MP4 (H.264), WebM (VP9), MOV, AVI, and MKV with optimized encoder presets for each
  • Adjustable output resolution: keep the original or pick 1080p, 720p, 480p, or 360p to match your target device
  • Three quality levels let you trade file size against visual quality. Choose Low for sharing, High for archiving
  • Trim before converting. Set start and end timecodes to extract only the segment you need. Quick presets cover common durations
  • Format-specific codecs: H.264 for MP4 and MOV, VP9 for WebM, MPEG-4 for AVI. Guarantees playback on any device
  • Real-time progress bar and detailed conversion log so you can see what is happening at every step

How It Works

  1. 1

    Pick your video

    Click or drag any video file into the upload area. MP4, MOV, AVI, MKV, WebM, FLV, WMV, 3GP — the tool reads them all.

  2. 2

    Choose output settings

    Select your target format from the dropdown. Set the resolution you want, or leave it at Original. Pick a quality level.

  3. 3

    Trim if needed

    Toggle the Trim option and set start and end times. Use the quick preset buttons for common clip lengths.

  4. 4

    Convert and download

    Hit Convert. Your video processes locally in the browser. When it finishes, the file downloads to your device ready to use.

Who Should Use This Converter

Video editors who need to match footage formats across different editing tools
Web developers preparing WebM and MP4 versions for cross-browser video playback
Content creators formatting videos for social platforms with specific requirements
Anyone stuck with a video that will not play on their device or media player
Archivists updating older formats like AVI and WMV to modern, well-supported codecs
Filmmakers delivering final cuts in the format a client requested

Frequently Asked Questions

What formats can I convert between?

You can feed the tool almost any video format. For output, pick from five: MP4 (H.264, plays everywhere), WebM (VP9, built for the web), MOV (Apple and QuickTime), AVI (legacy Windows), and MKV (Matroska). Each uses the right codec settings for good results.

Does converting reduce quality?

Any re-encode loses a small amount of quality. That is how video processing works. At High quality the difference is hard to spot. Medium gives you a good balance. Low creates tiny files when visual fidelity is not the priority.

How long does conversion take?

It depends on your video length, resolution, bitrate, and your computer. A short 1080p clip usually takes 15 to 60 seconds. 4K or long videos might need several minutes. The progress bar keeps you posted.

Can I batch convert multiple files?

The tool handles one video at a time, but there is no limit on how many you process in a row. Each one starts right away with no queue.

Do my videos get uploaded anywhere?

No. Everything happens in your browser. Your video stays on your device the entire time. Nothing travels over the network.

What is the file size limit?

No server-side cap. The real limit is your device's RAM, usually 2 to 4 GB. Very large files work best on a desktop browser.

Does changing resolution hurt quality?

Downscaling, like 4K to 1080p, reduces fine detail because you are throwing away pixels. Upscaling from a low resolution to a high one does not add real detail. For best results, keep the original resolution at High quality.

Is this converter actually free?

Yes. No premium tiers, no daily limits, no watermarks, no registration. Use it as much as you want, forever.

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