Max file size 1GB. Sign Up for more
By proceeding, you agree to our Terms of Use.
About MP4 to MKV
MP4 to MKV made simple
Convert MP4 to MKV format
Why choose MP4 to MKV?
Fast, secure, and reliable conversions tailored to this tool.
Lightning fast MP4 to MKV
MP4 to MKV finishes most jobs in seconds with our optimized pipeline.
Secure & private
Files are encrypted in transit and deleted on schedule to protect your data.
High quality output
We preserve clarity, layout, and metadata wherever possible for clean results.
No installs needed
Everything runs in the browser—perfect for locked-down workstations or travel.
Works everywhere
Desktop, tablet, or mobile—use the same workflow on any device.
Free to use
Unlimited conversions with zero paywalls or surprise limits.
How MP4 to MKV works
Three simple steps that fit any workflow.
1
Upload to MP4 to MKV
Drag and drop or browse to add your file. We support large inputs gracefully.
2
Pick the target format
Choose the output that fits your workflow—common choices are pre-filled.
3
Convert and download
Start the conversion and grab the optimized file within seconds.
Popular ways to use MP4 to MKV
Jump into common format pairs or switch to a nearby tool when you need it.
Image
JPG
→
Convert to
PNGWEBPGIFBMP
Image
PNG
→
Convert to
JPGWEBPSVGICO
Document
PDF
→
Convert to
DOCXTXTJPG
Audio
MP3
→
Convert to
WAVAACOGGFLAC
How to use MP4 to MKV
Clear steps so anyone can finish a conversion in under a minute.
01
Add your file
Drop a file or pick from your device. We validate size and type automatically.
02
Choose the output
Select the exact format you need. Popular targets are suggested first.
03
Run the conversion
Hit convert. We process securely, then surface a download the moment it is ready.
04
Download & share
Save locally or copy the link to hand off your converted file quickly.
MP4 to MKV
MP4 to MKV in a sentence
Convert MP4 to MKV format
MP4 to MKV
Best for
Quick one-off conversions, handoffs to teammates, or preparing assets for publishing.
MP4 to MKV
Why people switch to us
No installs, no sign-in friction, and predictable results that respect your original file.
Your privacy matters
All conversions are secured with SSL, and files are purged automatically after processing. Your work stays private, whether you convert one file or a full batch.
SSL Encrypted
Auto-Delete
GDPR Friendly
End-to-end encryption
No registration required
No watermarks added
Handles large files gracefully
Ready to use MP4 to MKV?
Start a new conversion or jump to a related tool above.
FAQs for MP4 to MKV
Common answers so you can keep moving.
Is there a free trial?
Yes. You can convert for free with generous limits. Heavy usage is throttled but never stops you from testing.
Are my files private?
Transfers are encrypted in transit. Files auto-delete on a schedule and are never shared or used for training.
What file sizes do you support?
Most tools handle up to hundreds of MBs. If a file is too large, we prompt you with a smaller chunk suggestion.
Can I use this on mobile?
Yes. The uploader and converter are optimized for touch devices and mobile networks.
Do you keep a copy of my data?
No. We retain files only for the duration needed to convert and deliver them.