Frame Grabber
Extract frames from your videos as images
Learn moreResize videos for TikTok, Instagram & YouTube. 100% Client-Side.
Change aspect ratio locally. No upload needed.
Easily convert your videos to 9:16, 1:1, 16:9, or custom aspect ratios. Perfect for adapting content for TikTok, Instagram Reels, YouTube Shorts, and standard posts. 100% Free & Client-Side.
One-click presets for TikTok (9:16), Instagram Square (1:1), and YouTube (16:9).
Choose how your video fits the new frame: Cover (crop), Contain (add black bars/letterbox), or Fill (stretch).
High-quality resizing using advanced browser-based processing. Your video stays crisp.
All processing happens on your device. Your videos are never uploaded to any server.
Stop struggling with complex editing software. Resize your videos instantly for any platform. Need to grab frames from your video? Try our Frame Grabber tool. Want to trim before resizing? Use our Video Trimmer first.
Select the video you want to resize. Supports MP4, WebM, MOV, and more.
Select a preset like 'Portrait (9:16)' or 'Square (1:1)', or enter custom dimensions.
Choose 'Cover' to crop and fill the screen, 'Contain' to see the whole video with bars, or 'Fill' to stretch.
Click 'Resize & Download' to save your new video file instantly.
Pro Tip: Use 'Cover' mode when converting landscape videos to vertical (TikTok/Shorts) to fill the whole screen, centered on the action.
We prioritize quality. However, 'Cover' mode crops pixels, and 'Fill' mode stretches pixels, which changes the visual fidelity. 'Contain' preserves the original image exactly.
Yes, 100% free and unlimited usage.
TikTok and Instagram Reels use 9:16 (Portrait).
Explore more tools that work great with Aspect Ratio Changer
Extract frames from your videos as images
Learn moreCut and trim videos with precision
Learn moreConvert videos between different formats
Learn more