Large Video Converter — 4K and up to 10 GB
Convert long recordings and 4K footage of up to 10 GB between MP4, MKV, MOV, AVI, WebM and more — free, at the same resolution and frame rate, with no watermark.
Drop your video — up to 10 GB
Choose the target format
Download the converted video
Choose file
or drag & drop — video files
Free · Unlimited · No sign-up · Max 10 GB
Your privacy is our mission. Most files are converted right in your browser and never leave your device. Only large files, or formats a browser cannot process, are sent to our server over an encrypted connection — they are never stored, never shared, and deleted as soon as your download is ready.
Can I Convert a Multi-Gigabyte Video Online?
Yes — up to 10 GB per video, free and without an account. The video keeps its resolution and frame rate, and when the target format can carry the same codecs it is not re-encoded at all. Uploads resume automatically after a dropped connection.
Same Picture, Different Container
Most video conversions people need are container changes: an MKV that must become an MP4 for an iPhone, a MOV for Windows, an MP4 for an old editor. If the codecs inside are allowed in the new container, the streams are copied bit for bit. That is why a 4 GB MKV can become an MP4 in well under a minute, with no quality loss.
When the codecs do not fit — WebM to MP4, MP4 to WMV — the video is re-encoded. The output keeps the source's resolution and frame rate, and its bitrate is matched to the source, so it does not come out smaller and softer than what you uploaded.
Where the Work Is Done
| Your file | What happens |
|---|---|
| Up to 900 MB, codecs fit the target | Converted in your browser — not uploaded |
| Larger, or needs re-encoding | Uploaded in adaptive pieces, converted on the server, deleted after download |
| Video to audio (MP3, WAV, FLAC…) | Soundtrack extracted in your browser, whatever the size |
Formats
Sources and targets: MP4, MKV, MOV, AVI, WebM, FLV, WMV, 3GP, TS, OGV and VOB. Every video can also be turned into MP3, WAV, FLAC, AAC, M4A, Opus and other audio formats.
Frequently Asked Questions
Is 4K 60 fps kept?
Yes. The converted file has the source's resolution and frame rate.
What is the size limit for video?
10 GB per file.
Is there a watermark?
No. Nothing is added to the video.
Why is my conversion re-encoding instead of copying?
Because the target container cannot hold the codecs in your file — for example VP9 video in MP4, or H.264 in WebM. In that case the video has to be encoded again, which takes longer.
Are subtitles kept?
The video and all audio tracks are kept. Subtitle tracks are not carried over.
Related
Last checked: 2026-10-02