Convert an MKV File to MP4
MKV to MP4 converter takes a video stored in the MKV container, often from a rip, a recording, or a media server, and gives it back as an MP4 that plays on phones, browsers, and editing software that don’t open MKV. Upload the file and download the converted copy, no software or account setup beyond signing in.
What you get:
- An MKV file converted to MP4, original resolution and framerate kept
- Files up to 2 GB in the free online tool on this page, with no set file size limit in the app
- bulk upload of multiple files, so several MKV files convert in one batch
- A transcript of the audio, with speaker labels, in 100+ languages
- AI chat with any recording, so you can ask the converted video a question instead of watching it back
- Export the transcript as PDF, DOCX, TXT, SRT and VTT
- Free plan: 3 uploads, lifetime, each with the transcript and AI chat included
How to Convert MKV to MP4
- Upload your MKV file: from a computer, phone, or tablet. The free online tool on this page takes files up to 2 GB; the ScreenApp app has no set file size limit.
- Let it process: the file converts to MP4 and the audio transcribes at the same time. Both are ready in your library once processing finishes.
- Download the MP4: open the file and download it. The transcript, speaker labels, and AI chat are attached to the same recording.
The MP4 keeps the source file’s resolution and framerate, so a low-resolution rip or recording stays low-resolution: converting the container does not add detail that was never recorded. Transcript quality follows the audio: clear narration transcribes cleanly, and a recording with background noise or overlapping speakers will have more gaps. See how we measure accuracy.
MKV to MP4 Converter vs Other Tools
| Feature | ScreenApp | CloudConvert | FreeConvert | HappyScribe |
|---|---|---|---|---|
| Max file size, free | 2 GB (free online tool) | 1 GB | 1 GB | Not stated |
| Free allowance | 3 uploads, lifetime | 10 credits/day | Not stated beyond the file size cap | Not stated |
| Paid plan | $19/month annual | Not stated (credit packs, priced by volume) | $12.99/month | $8.50/month annual |
Sources, checked 2026-09-29: ScreenApp pricing, cloudconvert.com/pricing, freeconvert.com/webm-to-mp4, freeconvert.com/pricing, happyscribe.com/pricing
- vs CloudConvert: CloudConvert’s MKV to MP4 tool page states no file size or daily limit, but its account-wide free tier gives 10 conversion credits a day. ScreenApp’s free plan is 3 uploads with no daily reset, with no set file size limit, and adds a transcript.
- vs FreeConvert: FreeConvert’s MKV to MP4 tool page caps free files at 1 GB, with paid plans starting at $12.99 a month for larger files. ScreenApp includes the transcript and AI chat on every converted file, free or paid.
- vs HappyScribe: HappyScribe’s MKV to MP4 tool page states no signup and no file size limit, but does not publish a cap either; its own transcription plans start at $8.50 a month billed annually. ScreenApp converts the file and transcribes it in the same free upload.
Who Converts MKV to MP4
Movie and TV show collectors work through MKV rips and recordings built for archiving picture and audio quality. Converting to MP4 makes the collection playable on a phone, tablet, or smart TV that does not open MKV.
Media server users convert MKV libraries to MP4 for smoother playback on devices and apps with patchier MKV support than a desktop media server.
Content creators and editors pull MKV footage into a modern editing project. Many editors prefer MP4, so converting first means the clip drops into Premiere Pro, Final Cut Pro, or DaVinci Resolve without a format error.
Mobile device users convert MKV video so it plays on an iPhone or an Android phone that does not support the format natively.
Social media content creators convert MKV recordings before uploading to YouTube, Instagram, or TikTok, all of which expect MP4.
