Video Conveter

Streams from disk like a desktop app. The file is never uploaded and never fully loaded into RAM.

On-device · chunked I/O MP4 / MOV / MKV / WebM — any size

Reads and writes in chunks, on this device. Chrome or Edge can save a 500 GB file straight to a folder you pick. Keep quality remuxes without re-encoding (disk-speed, like ffmpeg -c copy). Re-encoding a huge file still takes hours — leave this tab open. AVI / WMV / FLV use a fallback engine whose output must stay under ~1 GB.

Drop a video here, or click to choose

MP4, MOV, MKV, WebM, and more — any size

Small files download. Files over ~80 MB: Chrome or Edge, then pick a save folder. Compress of a 100 GB+ file can take many hours — keep this tab open.

Replace file

Format

Quality

Size

Trim

Start End

Leave end blank for the full clip. Times as 0:12 or 1:02:03.

Predicted output

—

Estimates update when you change quality, size, or trim.

Preparing…

Loading the converter into this tab.

0% done 100% left

Elapsed0:00

RemainingCalculating…

Predicted size—

Written so far0 B

Ready on this device

Saved to the folder you chose. It never went to a server.

Need stills instead of video? Free Image Converter — JPG/PNG/WebP, resize, batch ZIP, also on-device.

Video Conveter

Ready on this device

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