MKV to MP4
Convert a Matroska MKV into an MP4 your phone, TV and editor will open – no upload, no sign-up, no watermark added.
- No upload
- No sign-up
- No new watermark
- MP4, MOV, WebM, MKV, AVI
MKV is a flexible container that can hold almost any codec, several audio tracks and subtitle streams. That flexibility is why phones, smart TVs, iMovie and many websites refuse it. MP4 is the format they all agree on.
This converter re-encodes the MKV to an MP4 with H.264 video and AAC audio. The first video and audio track are used. Drop the file in, click Convert, download.
The whole job runs in your browser with FFmpeg WebAssembly. Nothing is sent to a server, no account is needed, and no watermark is added.
Subtitles are not carried over
Soft subtitle tracks inside the MKV are dropped. Download the .srt separately if you need it.
Only the first audio track
If the MKV has several languages, the first track is used. Check which one that is before converting.
Large MKV files
Full-length recordings are often over 1 GB, which is more than a browser can hold. Cut a shorter section with the video cutter first.
All tools
Watermark removal
Video watermark remover
Draw a box over any watermark, logo or text and download a clean MP4.
TikTok watermark remover
Clean the moving TikTok logo and @username from your own downloaded videos.
Sora watermark remover
Remove the animated Sora and Sora 2 logo from AI videos you generated.
Veo watermark remover
Take the Veo 3 sparkle mark off videos made with Gemini or Google Flow.
Gemini watermark remover
Erase the ✦ sparkle from Gemini images and Veo videos.
Gemini image watermark remover
Fill in the bottom-right sparkle on Gemini and Nano Banana images at full resolution.
Gemini image logo remover
Erase the corner ✦ logo from Gemini-generated images.
Nano Banana watermark remover
Clean the sparkle off Nano Banana / Gemini image outputs.
Gemini video watermark remover
Remove the Gemini sparkle watermark from Veo 3 videos generated in the Gemini app.
Gemini logo remover
Remove the corner logo from Gemini, Veo and Flow video exports.
Gemini video logo remover
Remove the corner logo from Veo 3 videos made in Gemini.
Veo logo remover
Remove the Veo 3 corner logo from generated videos.
Image watermark remover
Fill or blur a logo or text on PNG, JPG and WebP images in your browser.
Remove logo from video
Erase TV channel bugs, stock-footage stamps and screen-recorder logos from a fixed corner.
Remove text from video
Blur or fill captions, dates, usernames and timestamps burned into the picture.
Edit video
Crop video
Drag a crop box or pick 1:1, 4:5, 9:16 or 16:9 and export a clean MP4.
Video cutter
Trim a video to a start and end time, with a fast no-re-encode mode.
Video compressor
Reduce a video's file size by quality or resolution, typically 50–80 % smaller.
Resize video
Scale a video to 1080p, 720p, 480p or social-media sizes while keeping the aspect ratio.
Rotate video
Rotate a video 90, 180 or 270 degrees and fix sideways phone clips.
Flip video
Mirror a video horizontally or vertically to un-mirror selfie clips.
Video speed changer
Speed up or slow down a video from 0.25× to 4× with audio pitch preserved.
Reverse video
Play a short video backwards, with the audio reversed too.
Loop video
Repeat a clip 2–10 times or up to a target duration for Instagram and boomerangs.
Mute video
Remove the audio track from a video in seconds without re-encoding the picture.
Convert
Video converter
Convert MOV, MKV, AVI or WebM to MP4, or MP4 to WebM, in your browser.
MOV to MP4
Convert iPhone and QuickTime MOV files to H.264 MP4 that plays everywhere.
WebM to MP4
Convert VP8/VP9 WebM files to H.264 MP4 for phones, editors and social apps.
MKV to MP4
Convert Matroska MKV files to H.264 MP4 for phones, TVs and editors.
AVI to MP4
Convert old camcorder and DivX/Xvid AVI files to H.264 MP4.
MP4 to WebM
Convert MP4 to a smaller VP9 + Opus WebM for websites and Discord.
Video to GIF
Make a looping GIF from a short video clip, with a palette pass for clean colours.
Frequently asked questions
Does MKV to MP4 reduce quality?
The video is re-encoded to H.264. On the High setting the difference is not visible on a phone or laptop screen.
Will HEVC or VP9 MKV files work?
Yes. Any codec FFmpeg can decode is converted to H.264. HEVC and VP9 sources take longer to decode.
Is there a file size limit?
Browsers handle roughly 1 GB in memory. Files under about 300 MB and 1080p are comfortable; 4K works but is slow.
Is it free and private?
Yes. No sign-up, no watermark, and the file never leaves your device.