Video Resizer: Resize Video for Instagram Reels, TikTok, Shorts and YouTube

Blur, crop, bars or stretch: which fill to choose

Blurred background keeps the whole picture visible and fills the empty space with a soft, darkened copy of the video, which is the look most creators use for landscape-to-vertical conversions. Crop to fill removes the bars completely by trimming the edges; use the zoom slider and drag the preview to keep the subject in frame. Color bars add a solid color (great for brand colors), and Stretch fills the frame by distorting the picture, which is only advisable for tiny ratio changes.

Convert landscape to vertical (16:9 to 9:16)

Choose TikTok, Reels or Shorts. With Blurred background the full landscape shot sits in the middle of a 1080 × 1920 frame; with Crop to fill and a zoom of around 100% the frame is filled by the center of the shot, and you can drag left or right to follow the action. For talking-head videos, crop and pan to the speaker's face for the most native look.

Trim to the platform limit

If your clip is longer than the platform allows, a warning appears and the Trim option opens with the limit already applied. Drag the handles on the filmstrip to choose the best section. Lower render sizes (75%, 50%, lite) export faster and give smaller files when you only need a preview or a draft.

Fast, private export

Unlike tools that upload your video or record it in real time, this resizer decodes and re-encodes every frame in your browser with WebCodecs. A one-minute video usually exports in well under a minute, the file has a correct duration and seeks properly, and the original sound is copied across untouched.

Rotate a sideways video firstAdd captions for silent autoplayMake a thumbnail or cover