Resize a video for social media

Resize a video to vertical, square, portrait 4:5 or landscape. Adjust the crop, use black bars or a blurred background, and download an MP4 without uploading.

MP4 · MOV · M4V · WebM → MP4 (9:16 · 1:1 · 4:5 · 16:9)

View guide : Turn a landscape video into a portrait clip (new tab)

Choose my video

50 MiB · 60 seconds · up to 1920 px per side · up to 60 fps. Blurred background: 60 seconds maximum.

The video engine downloads about 32 MB on first import. A recent computer is recommended.

H.264 in MP4/MOV/M4V or VP8/VP9 in WebM, 8-bit SDR colours. HEVC, HDR and multichannel audio are unsupported. Output: H.264/AAC MP4, up to 30 fps and 64 MiB. The first audio track is kept and re-encoded.

Steps, formats and limits

How to use this tool

Choose a compatible video or try the illustrated sample.
Choose the format, edge treatment and framing position.
Create the MP4, check picture and sound, then download your copy.

Does the frame follow the subject?

No. Framing stays fixed throughout the video. Check several moments using the original video’s playback controls.

Can I keep the whole picture?

Yes: choose black bars or a blurred background. Blur is limited to 60 seconds and is a backdrop effect.

Is the sound kept?

The first audio track is re-encoded to AAC; silent videos stay silent. Video is re-encoded to H.264 at up to 30 fps.

Is this a video editor?

It adapts an existing video. It does not generate slideshows, follow a subject or publish to social media. Platforms have their own requirements.

Read the practical guide: Turn a landscape video into a portrait clip (new tab)