Video Converter

Drag & Drop or Click to Select a Video

MP4, MOV, WebM, or MKV

Tip: paste a video file from clipboard (Ctrl/⌘+V).

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Settings are written to the URL as you change them. Nothing differs from the defaults yet.

Change a video’s container between MP4, MOV, WebM, and MKV. The converter copies every stream it can and re-encodes only the ones the new format would not play.

Container vs codec

A video file is a container holding separately encoded streams: usually one video stream and one audio stream. The file extension names the container. The codec, such as H.264 or VP9, is how each stream inside was compressed.

Changing the container does not require re-encoding when the codecs inside are already welcome in the new one. An MKV holding H.264 video and AAC audio becomes an MP4 by moving the same packets into a different wrapper.

Copy or re-encode

Each output format has a list of codecs it copies:

MP4: H.264 and HEVC video, AAC and MP3 audio.
MOV: H.264, HEVC, and ProRes video, AAC and PCM audio.
WebM: VP9, VP8, and AV1 video, Opus and Vorbis audio.
MKV: nearly all of the above.

MP4 can technically hold VP9 and Opus, but QuickTime, iPhones, and most editing apps refuse that pairing, so a WebM source becomes H.264 and AAC in an MP4 rather than a file that only plays in a browser. The Plan section under the settings shows the decision for the loaded file before you convert.

Copied streams

A copy moves the encoded packets unchanged. It finishes in about the time it takes to read the file, and the output is bit-for-bit the same picture and sound. Rotation stays as metadata, so a portrait phone clip still plays upright.

Re-encoded streams

A re-encode decodes every frame and compresses it again at the source size with a high quality setting. It takes much longer than a copy, and like any lossy encode it gives up a little detail.

The Re-encode video switch forces this even when a copy would fit. Use it when a copied HEVC or ProRes file will not open in the app it is meant for, since H.264 is the codec nearly everything plays.

HEVC from iPhones

iPhones record HEVC in MOV files by default. Converting to MP4 copies the HEVC stream, which plays on Apple devices and in current versions of Windows and Chrome with hardware support. For older software, switch on Re-encode video to get H.264.

Frequently Asked Questions

Which formats can it read and write?

It reads MP4, M4V, MOV, WebM, and MKV, and writes MP4, MOV, WebM, and MKV. AVI and WMV files cannot be read.

Why did my conversion finish almost instantly?

The video and audio streams already used codecs the new container plays, so they were copied packet for packet instead of re-encoded. No frame was decoded, so the output has exactly the quality of the source. MKV to MP4 with H.264 inside is the usual case.

When is the video re-encoded?

When the source codec is not one the output format is expected to play. WebM to MP4 re-encodes VP9 to H.264 and Opus to AAC, because QuickTime, iPhones, and most editors do not open VP9 or Opus inside an MP4 file. The Plan section shows which streams will be copied before you convert.

Does converting lose quality?

A copied stream loses nothing. A re-encoded stream is compressed again at a high quality setting, which keeps the loss small but not zero. Switch on Re-encode video only when the copied file will not open where you need it.

Is the frame size or frame rate changed?

No. The converter keeps the source's size and timing. Use the Video Compressor to scale the frame down or set a bitrate.

Looking for a faster, single-purpose workflow?

Jump straight to a conversion

001 MKV to MP4 Converter

002 MOV to MP4 Converter

003 MP4 to WebM Converter

004 WebM to MP4 Converter

Explore Our Tools

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Video Compressor

Reduce a video's file size by choosing a quality level or a target size in MB. Set the codec (H.264, VP9, or AV1), scale the frame down, and re-encode or remove the audio.

Extract Audio from Video

Pull the audio track out of an MP4, MOV, MKV, WebM, or MPEG-TS file. Copy it into a new container without re-encoding, or decode it to WAV, MP3, M4A, Ogg Opus, or FLAC.

Remove Audio from Video

Remove the soundtrack from a video and keep the picture exactly as it is: the video stream is copied without re-encoding, into the same format. Works with MP4, MOV, WebM, and MKV.

Change Pitch of Video

Raise or lower the pitch of a video's soundtrack by up to 12 semitones without changing its speed or length, and keep the picture untouched. Presets for deeper and higher voices and whole octaves. Exports MP4, WebM, MOV, or MKV.

Video Volume Booster

Make a video louder by up to 24 dB with a limiter that holds peaks below a ceiling, so the boost does not clip or distort. The picture is copied untouched. Exports MP4, WebM, MOV, or MKV.

Black and White Video Converter

Convert a color video to black and white using perceptual luminance, with optional auto-contrast, partial desaturation, and inversion. Exports MP4 or WebM with the original soundtrack.

Remove Background Noise from Video

Reduce steady background noise in a video's soundtrack: hiss, fan and air-conditioning noise, room tone, and optional electrical hum at 50 or 60 Hz. The picture is copied untouched. Exports MP4, WebM, MOV, or MKV.

Video Negative Converter

Convert film negative footage into a positive video. Divides out the orange mask of color negative film, inverts every frame, keeps the soundtrack, and exports MP4 or WebM.

Color Grading Video

Grade a video with separate colors for the shadows, midtones, and highlights, and shift the crossover between them. Luminance stays close to the original. Exports MP4 or WebM with the original soundtrack.

Dispersion Video Effect

Break the edges in every frame of a video into particles that drift left, right, up, or down, with a new particle layout on every frame. Set particle amount, travel distance, edge threshold, and direction. Exports MP4 or WebM with the original soundtrack.

Duotone Video Effect

Map every frame of a video onto a two-color gradient from a shadow color to a highlight color, and shift the balance between them. Exports MP4 or WebM with the original soundtrack.

Film Stock Video Emulator

Grade a video to one of seventeen named film stocks, including Portra 400, Kodachrome 64, Velvia 50, CineStill 800T, and Tri-X 400, with grain that moves on every frame and trims for exposure, contrast, grain, and halation. Exports MP4 or WebM with the original soundtrack.