9:16
TikTok Reels · Shorts
AI Subject Tracking — Smart Auto Crop & Reframe Videos
Traditional cropping is a manual slog — adjust the frame, set keyframes, track the subject shot by shot. Video Reframer AI eliminates all of that. Our AI analyzes every frame, identifies the primary subject, and keeps them centered as it reframes to your chosen ratio.
- 🎯 Smart Subject Detection — AI auto-identifies people, faces, and key action — frame by frame, no manual selection.
- 🎬 Frame-by-Frame Precision — 98%+ tracking accuracy when changing video aspect ratio — even through fast motion and scene cuts.
- ⚡ Zero Keyframing — No keyframes, no parameter tweaks, no timeline — upload, pick a ratio, done.
Free trial with no watermarks or compression.
Change Video Aspect Ratio for Every Platform in One Click
TikTok video size is 9:16, YouTube wants 16:9, Instagram runs 1:1 or 4:5. Resize video for any platform in seconds — pick a ratio from the dropdown.
📱 9:16 Portrait — TikTok video size, Instagram Reels & YouTube Shorts. Full mobile screen coverage.
🖥️ 16:9 Landscape — YouTube video resizer ratio for desktop & broadcast. Universal standard.
◼ 1:1 & 4:5 — Resize video for Instagram Feed & Portrait. High-engagement formats.
🎬 Apply to All — Batch crop video at the same ratio in a single pass.
Free trial with no watermarks or compression.
Cloud-Based Video Resizer — Zero GPU, No Limits
Resizing and cropping video is compute-intensive work. On a local machine it means long renders. With Video Reframer AI, the entire video resizer pipeline runs on FabCloud — instantly, without touching your hardware.
☁️ No Local GPU Needed — Works on any Windows PC — even entry-level laptops can run a full AI aspect ratio changer workflow in the cloud.
🖥️ Low System Requirements — Resize video on any Windows desktop — no powerful hardware, all done in the cloud.
📦 Batch Processing — Submit multiple clips with "Apply to All" — batch resize video, no queue management.
Free trial with no watermarks or compression.
How to Change the Aspect Ratio of a Video
Auto Reframe Video for Any Platform, Instantly
Seven aspect ratios from one source. Crop, resize and convert video for every major platform — no re-editing, no wrong size.
16:9
YouTube Desktop
1:1
Instagram Feed
4:5
Instagram Portrait
4:3
Broadcast Presentation
3:4
Portrait Displa
21:9
Cinematic Ultra-wide
Ready to Upgrade? Get UniFab All-In-One
Trusted by
"What sets UniFab Video Reframer AI apart is the cloud pipeline. No GPU stress on the local machine, and the subject tracking holds up cleanly through fast cuts. Output quality matches the source file."
"An impressive 'set-it-and-forget-it' tool. The Apply to All option reframes a whole batch of clips to 9:16 or 1:1 in one pass, freeing editors from manual cropping work entirely."
"UniFab Video Reframer AI quietly solves a real short-form problem: a 16:9 source that fits nowhere else. Drop it in, pick a ratio, and the AI rebuilds the framing in the cloud."
"Surprisingly simple — upload, pick one of seven aspect ratios, and let the AI handle the rest. No keyframing, no timeline. A clean answer to 'how to crop a video for any platform.'"
"Used to manually reframe every interview clip for Shorts. Now I drop the file into UniFab Video Reframer AI, pick 9:16, and the subject stays locked the entire cut. Zero re-takes, zero render queue."
Techify
YouTuber with 254k+ followers
"Used to manually reframe every interview clip for Shorts. Now I drop the file into UniFab Video Reframer AI, pick 9:16, and the subject stays locked the entire cut. Zero re-takes, zero render queue."
"I shoot once and post everywhere — TikTok, Reels, YouTube. Reframer AI is the first tool that actually keeps the speaker in frame across all three ratios. Saved me hours every week."
Emma
Photographer
"I edit on a six-year-old laptop, so cloud rendering matters. Submit a batch, walk away, come back to clean 9:16 cuts. No fan noise, no waiting on a render bar."
James
Vlogger
"The subject tracking is the part that surprised me. Even on fast pans the framing stays locked. I crop interview footage for socials every week and it just works."
Lucas
Videographer
FAQs about Video Reframer AI
Learn more through our YouTube channel, guidebook, or community discussion.
Video Reframer AI offers a free trial with limited FabCloud credits — enough to test the full workflow with no watermarks and no compression. A license purchase gives you a credits allocation for ongoing use.
Seven aspect ratios are supported: 16:9 (YouTube / Desktop), 9:16 (TikTok / Reels / Shorts), 4:3 (Broadcast / Presentation), 3:4 (Portrait Display), 1:1 (Instagram Feed), 4:5 (Instagram Portrait), and 21:9 (Cinematic / Ultra-wide). The default is 16:9.
Video Reframer AI - FabCloud is currently available for Windows only. Mac support is not available at this time. Stay tuned for updates.
Video Reframer AI supports common video input formats including MP4, MOV, AVI, MKV, WMV, and FLV. The output is delivered in the same quality as the source — no compression is applied.
The AI analyzes each frame individually, identifying the primary subject using object detection and motion tracking. It then determines the optimal crop region that keeps the subject centered throughout the video — automatically adjusting as the subject moves.
"Hands-down the easiest way to repurpose one shoot for TikTok, Reels, and YouTube. The AI keeps the subject centered every time and we re-edit nothing. A real time-saver for our content team."