Video Converter

About this converter

Video files are containers: MP4, Matroska and WebM wrap a video codec, one or more audio tracks and, often, subtitles and chapter markers. Visitors bring phone recordings, downloads, screen captures and camera footage, and the same clip can arrive in a dozen different wrappers. The extension on the file says less than it seems: two MP4 files can carry different codecs and behave differently.

The converter reads every format listed below and writes the output format you choose before adding files. It re-wraps and re-encodes the streams together, so footage recorded in one app plays in another, uploads to a service with strict input rules, or opens in an editor that cannot read the original container. Audio follows the video; subtitles and extra tracks are carried only where the target container supports them.

How it works

Formats you can convert

The video catalog covers phone recordings, downloaded films, broadcast captures and older hardware. Every format below is recognised on upload, and the output you choose decides the codec and container of the result.

• MP4 — the most widely played container, usually H.264 with AAC audio
• Matroska (MKV) — a flexible Matroska wrapper for almost any codec, subtitles included
• WebM — the open web container, carrying VP8, VP9 or AV1 video
• QuickTime (MOV) — Apple's QuickTime container, default for iPhone and Mac recordings
• AVI — a 1990s Microsoft container still emitted by capture cards
• Flash Video (FLV) — flash-era video, read here but never written as a result
• Windows Media (WMV) — Windows Media video, often DRM-protected and read-only here
• MPEG — MPEG-1 and MPEG-2 program streams from older discs
• MPEG Transport Stream (TS) — the transport stream of broadcast and recorded television
• 3GP — the compact container of older mobile phones
• Ogg Video — Ogg video, usually Theora or VP8 with Vorbis audio
• GIF (animated) — the animated GIF loop, handled as a short clip
• Animated PNG — an animated PNG for small loops with transparency

Quality and what changes

Re-encoding video is lossy whenever the target codec differs from the source. MP4 and MOV usually hold H.264 or HEVC, WebM holds VP8, VP9 or AV1, and older AVI files often carry MPEG-4 video. The converter keeps the frame size and frame rate unless you choose a different size or rate, or the target cannot represent them, and the encoder spends fewer bits on what the eye notices least. Detail is discarded, but at a sensible quality target the result stays close to the original on an ordinary screen.

Privacy and limits

Guests can convert files up to 100 megabytes and run 5 conversions per day. A free account raises the limit to 500 megabytes and 25 conversions per day, and paid plans go up to 100 gigabytes.

Files you upload and the results you download are kept only long enough for you to collect them and are deleted after 2 hours. After that window nothing of yours remains on the server.

You do not need an account to convert a file; signing in only raises the size and daily limits.

Questions and answers