Convert 3GP to MKV

Overview

Convert videos between MP4, WebM, AVI, MOV, MKV, WMV, FLV, M4V, 3GP and animated GIF. The converter is FFmpeg compiled to WebAssembly and runs on your own computer, so your videos are never uploaded and there's no account or queue. Add several files at once and download each one as soon as it's done.

Videos that play anywhereTurn AVI or WMV files from a Windows PC into MP4 that plays on iPhone, Android and in any browser.
Make a GIFTurn a short clip into a GIF for a post, a chat reaction or a web page.
Smaller video for the webConvert a heavy MOV or MKV file to WebM so it's smaller and loads faster on your site.
Convert a whole batchDrop in a set of videos and convert them all to the same format in one go.
Private footageConvert dashcam, home camera or medical clips that shouldn't leave your computer.

Set

Video Tools 08

Neighbours

01 Extract Audio from Video 02 Compress Video 03 HLS Stream Generator 04 Video & Audio Viewer 05 Photobooth 06 Screen Recorder

Related conversions

01 MKV to 3GP 02 3GP to MP4 03 3GP to AVI 04 3GP to MOV 05 3GP to WMV 06 3GP to FLV 07 3GP to WebM 08 3GP to MPG 09 3GP to MPEG 10 3GP to TS 11 3GP to M2TS 12 3GP to VOB

Specification

Command: video.video_converter
Set: Video
Input: MIXED
Output: MIXED
Max file: 500MB
Batch: yes

MP4 WEBM AVI MOV MKV WMV FLV M4V 3GP GIF

Runtime

Engine: ffmpeg-wasm 0.12
Threads: — workers
Isolated: —
WebGPU: —
Memory: —

Transport 0 B

Your file is opened, worked on and saved inside this tab. This tool has no upload step, so your file has nowhere else to go.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/

How it works

Add your videos

Drop in one or more video files, or click to pick them.

Pick a format

Choose MP4, WebM, AVI, MOV, MKV or GIF, and set the quality if you like.

Download

Each video converts on your computer and is ready to download when it finishes.

Frequently asked

What video formats can I convert between?

You can open almost any video the in-browser FFmpeg can read: MP4, MOV, MKV, WebM, AVI, WMV, FLV, M4V, 3GP, MPEG-TS (.ts, .mts, .m2ts), MPG/VOB, OGV, MXF and animated GIF. You can save as MP4, WebM, AVI, MOV, MKV or GIF. AV1 video and copy-protected (DRM) files can't be decoded in the browser, and the tool tells you so. For an audio-only file, it points you to the Audio Converter.

Can I convert videos to GIF format?

Yes. Pick GIF as the output and choose where the clip starts and how long it runs. Handy for short clips in chats, posts or web pages.

Is there a file size limit for video conversion?

Yes, 500 MB per video. That keeps conversion in the browser at a reasonable speed.

How long does video conversion take?

It depends on the file size, the formats and the quality setting. Most conversions finish within 2–15 minutes.

Are my videos uploaded to your servers?

No. Conversion runs in your browser with WebAssembly, so your videos stay on your computer.

Can I convert multiple videos at once?

Yes. Add several videos, pick one output format, and they convert one after another.

Which format should I choose for my converted video?

MP4 plays almost everywhere. WebM gives small files for the web. MOV suits Apple devices.

Keys

Search: ⌘K
Panels: ⌘1 · ⌘2
Full width: F
All keys: ⌘/