MKV to MP4 converter
Convert MKV, WebM, AVI, FLV, WMV and 3GP to MP4 or MOV in HD up to 4K. Streams are copied when the codec fits, so it’s fast and lossless.
MKV to MP4 online ProMedia for Android
ProMedia Video Converter App for Android
A video converter app for Android that converts MKV to MP4, compresses video to the size you need and turns video into MP3 or GIF. It has 120+ tools, and the core ones work offline on your phone. No upload, no sign-up, no watermark.
- Every file is checked, so an MP4 is really an MP4.
- See the estimated size before you convert or compress.
- If one file in a batch fails, the rest still finish.
- Core tools need no internet, and files never leave your phone.
Inside the app
See ProMedia In Action
Captions, encoding, AI edit plans, batches, your library and 11 languages, screen by screen.
01Auto captionsPro
Captions In One Tap. Every Word Checked.
Captions are made on your phone in 20 languages. Read them through, pick Plain, Boxed, Karaoke or Pop, then burn them in or add them as a track — no watermark.
Auto captions in your browserAuto captions
Choose how your captions look and appear.
PreviewLake-voiceover.mp4
A quiet morning givesOne frame of your clip, through the chain that will run.
Look
PlainBoxedKaraokePop
High contrast on a solid box — the most readable of the four.
Where they go
Burn into pictureAlways visible, and plays anywhere. Re-encodes the video.
Add as trackSwitchable in the player. Styling depends on the container.
Words reviewedStyle · last step
02Full control
One Tap Presets, Or Every Setting.
Choose Faster render, Balanced or Best quality — or set the format, bitrate, resolution, frame rate and audio yourself. Save a setup and reuse it.
Video encoder on the webEncode video
Tune codecs, bitrate and advanced parameters before encoding.
Saved settingsA saved setup is ready to use.
Quality
Faster renderBalancedBest quality
Output format:MP4
Video bitrate:
Autokbps
Auto — from the quality preset
Video resolution:Smaller frames reduce detail and can make smaller files.Source
Frame rate:
Source60302415
Matches the frame rate without changing playback speed.
Audio bitrate:
192kbps
Higher bitrates preserve more sound detail and use more space.
Audio channels:
MonoStereo
Mono combines channels; stereo keeps left and right.
03AI edit planPro
Say What You Want. Approve The Plan.
Type “keep the first 4 seconds, remove the audio, convert to MP4 at 720p”. ProMedia turns it into steps you can check and change before anything runs.
AI video editor on the web
Lake-voiceover.mp41 video · 1.2 MB · 0:05You said
“Keep the first 4 seconds, remove the audio, then convert to MP4 at 720p.”
The plan3 steps · 1 video
1Trim videoKeep 0:00 to 0:04 Original videoEdit settings
2Mute videoRemove the audio track Step 1 · trimmed videoEdit settings
3Convert videoSave as MP4 at 720p Step 2 · silent videoEdit settings
Add a tool
You’ll get
Lake-voiceover_converted.mp4MP4 · 720p · 0:04 · no audio04Batch processing
Do The Whole Batch In One Tap.
Convert or compress a batch and see the size saved on every file. If one file fails, the rest still finish.
Compress video onlineAll 5 done
Encode video · 5 files saved
Files
Boat-trailer_encoded_1.mp4770.0 KB → 437.5 KB (−43%)
Cafe-morning_encoded_1.mp41.1 MB → 567.7 KB (−48%)Lake-voiceover_encoded.mp41.2 MB → 833.0 KB (−31%)
Sneaker-promo_encoded.mp4MP4 · Ready to share
Peaks-sunrise_encoded.mp4MP4 · Ready to shareSaved to
ProMedia / Video / Encode
Share all 5
Done
05Your files
Every Export, Right Where You Left It.
Finished files are grouped by video, audio, image and subtitle, with size and time — ready to open or share.
ProMedia
Video 7Audio 1Image 0Subtitle 0
Today
Music-sample_encoded.mp3Encode audio · 300.5 KB · 3:33 AM
Lake-voiceover_audio.mp3Extract audio · 151.0 KB · 3:29 AM
Lake-voiceover_encoded.mp4Encode video · 833.0 KB · 3:28 AMBoat-trailer_encoded_1.mp4Encode video · 437.5 KB · 3:28 AMCafe-morning_encoded_1.mp4Encode video · 567.7 KB · 3:28 AMSneaker-promo_encoded.mp4Encode video · MP4 · Ready to sharePeaks-sunrise_encoded.mp4Encode video · MP4 · Ready to share0611 languages
Use It In Your Language.
Switch between 11 languages — including Spanish, Portuguese, Arabic and Japanese — or let ProMedia follow your phone.
In your language
The tools you know, in words that feel familiar.
Current languageEnglishEnglish
Follow the systemWhatever your phone speaks
Choose a language11 languages
中文Chinese
EspañolSpanish
العربيةArabic
PortuguêsPortuguese
РусскийRussian
日本語Japanese
한국어Korean
DeutschGerman
FrançaisFrench
PolskiPolish
What’s inside
Video, MP3 & GIF Tools, Offline On Your Phone
A video converter, video compressor, MP3 converter and GIF maker in one app, with share-sheet support and, with Pro, background rendering.
Video compressor
Compress to 10, 25, 50 or 100 MB, or type your own target. See the estimated size before you start, even in a batch.
Compress video onlineVideo to MP3 converter
Extract audio at up to 320 kbps, or export AAC, WAV and FLAC. Convert M4A or WAV to MP3 and shrink audio files.
MP4 to MP3 onlineGIF maker
Turn video into GIF with your own frame rate, width and loop, or photos into GIF, and GIF back into video.
Video to GIF onlineAuto captions (Pro)
Captions made on your phone in 20 languages. Check every word, style them, and burn them in with no watermark.
Auto captions onlineVideo editor & enhancer
Trim, merge with crossfades, split, crop, rotate, slow motion, timelapse, stabilize, LUTs, text, music and logos.
Trim video onlineAudio editor
Vocal remover, noise reducer, slowed + reverb, nightcore, 8D, voice and pitch changer, MP3 cutter and ringtone maker.
Vocal remover onlineSubtitle editor
Add subtitles as a track or burn them in with style. Convert SRT, VTT and ASS, fix sync and stack two languages.
Subtitle editor onlineHEIC to JPG & photo tools
Convert HEIC offline in batches, compress to a size in KB, resize, crop and strip EXIF location data.
HEIC to JPG onlineOn a computer or iPhone? The same tools run in your browser:
Free & Pro
Start Free. Go Pro When You Need It
Without Pro
Free
- 112 tools
- 3 renders a day, up to 5 files each
- Watch a short ad for another render
- No watermark on exports
- Contains ads
With Pro
In-app purchase
- Every AI tool (captions, auto cut, auto clips, edit planner…)
- No ads
- No daily render limit, no 5-file limit
- Renders in the background
- Hardware-accelerated encoding on supported phones
A few Pro AI text features, like edit planning and caption translation, go online and ask first. Everything else runs on your phone.
FAQ
Android App Questions, Answered
Is ProMedia for Android free?
Yes. ProMedia for Android is free on Google Play with 112 tools, 3 renders a day of up to 5 files each (watch a short ad for another), and no watermark on exports. The free version shows ads. Pro is an optional in-app purchase that unlocks every AI tool and removes the ads and limits.
Can I convert videos offline on Android?
Yes. ProMedia Video Converter converts, compresses and edits on your phone, and the core tools need no internet, so your videos, music and photos are never uploaded. A few Pro AI text features, like edit planning and caption translation, go online and ask you first.
Can I convert MKV to MP4 on Android?
Yes. ProMedia Video Converter turns MKV, WebM, AVI, FLV, WMV and 3GP into MP4 or MOV in HD up to 4K. When the codec already fits, the streams are copied instead of re-encoded, so the conversion is fast and lossless.
How do I compress a video on Android?
Open Compress video in ProMedia Video Converter, add one video or a whole batch, and pick 10, 25, 50 or 100 MB or type your own target. The estimated size shows before you start, so you can check it fits WhatsApp, email or Discord, then compress.
Can I compress video on Android without losing quality?
Compressing always re-encodes, so some detail goes; choose the largest size your app or chat allows and check the estimate first. If you only need a different format, the converter copies the streams when the codec fits, which keeps the original quality.
How do I convert a video to MP3 on Android?
Open the video to MP3 converter, pick your video and save the audio as MP3 at up to 320 kbps, or as AAC, WAV or FLAC. The audio converter also turns M4A or WAV into MP3, and the audio compressor shrinks large files.
What does ProMedia Pro add?
Every AI tool (auto captions in 20 languages, auto cut, auto clips, read aloud and the AI edit planner), plus no ads, no daily render limit, no 5-file limit, rendering in the background and hardware-accelerated encoding on supported phones.
Which languages does the app support?
ProMedia for Android is available in 11 languages: English, Chinese, Spanish, Arabic, Portuguese, Russian, Japanese, Korean, German, French and Polish. It can also follow your phone’s language.
Is there a version for iPhone or a computer?
The app is for Android. On an iPhone, Mac, Windows PC or Chromebook, use ProMedia in your browser: the same private approach, 190+ tools, and nothing to install.
Take ProMedia With You
Free on Google Play. Works offline. Nothing is uploaded.