Tutorials
How to Crop Video Online Without Uploading
Drag handles on the preview to remove borders or reframe your shot, then export a cropped MP4 locally.
Black bars, edge distractions, and wrong aspect ratios are often fixed faster with a crop than a full re-shoot. Crop Video lets you drag handles on the preview - like cropping a photo - and export a reframed MP4 entirely in the browser.
When to crop instead of resize
| Situation | Tool |
|---|---|
| Remove edges or reframe subject | Crop Video |
| Fit platform aspect with letterboxing | Social Media Resize |
| Delete time sections | Trim Video |
Crop changes what is inside the frame. Social resize scales the whole frame to platform dimensions, optionally with blurred bars.
Step-by-step: crop a video frame
- Open Crop Video and select a source clip from your device.
- Drag corners and edges of the crop box on the preview. Darkened areas will be removed.
- Scrub the timeline - if your subject moves, confirm the crop still works at key moments (crop is static across time).
- Check Output size readout for final pixel dimensions.
- Click Crop & Download when framing looks right.
Encoding runs locally. Output is MP4.
Aspect ratio quick reference
| Target feel | Crop shape hint |
|---|---|
| YouTube horizontal | 16:9 box centered on subject |
| Instagram feed (1:1) | Square crop on center action |
| Vertical Shorts source | Tall narrow box; verify with Social Media Resize after |
Cropping does not change pixel aspect ratio metadata magically - extreme shapes may require follow-up resize for platform upload checks.
Static crop limitations
ALTools applies one crop rectangle to the entire clip - there is no per-keyframe tracking. If the subject drifts toward an edge, either:
- Leave extra headroom in the crop box
- Use a wider crop then Social Media Resize
- Edit in an advanced NLE for motion tracking
For talking-head videos centered in frame, static crop works well.
Crop-then-resize pipeline
Many social workflows need both reframing and exact pixel dimensions. Order matters:
- Crop to remove distractions and center the subject
- Social Media Resize to hit 9:16, 1:1, or platform presets with blur padding
- Compress Video once at the end
Cropping first avoids scaling black bars you never wanted in frame. If you only need a gentle 16:9 tighten on an already horizontal clip, crop alone may be enough — skip resize to save a generation.
Screen recordings benefit from crop-before-resize especially: hide the menu bar in crop, then resize to Shorts so the code editor fills the vertical frame.
Tips for better framing
- Rule of thirds - place eyes or product along grid lines after crop.
- Remove UI chrome - screen recordings often need crop to hide OS menus.
- Pair with compress - cropping re-encodes; follow with Compress Video only once.
- Do not upscale - cropping below 1080p then posting as HD looks soft; start from high-res source.
- Preview at export resolution — zoom the preview to 100% before download; soft focus is obvious at native pixels.
- Export once — chaining crop → resize → crop adds generation loss; plan the pipeline first.
Talking-head creators moving from 4:3 webcam to 16:9 deliverables often crop top/bottom slack rather than stretching — viewers perceive stretch as lower quality than letterboxing.
Drone footage often includes propeller edges — a slight crop cleans the frame before Social Media Resize to vertical.
Common issues
Subject cut off. Crop box too tight - expand or reposition.
Output resolution unexpected. Extreme crops reduce pixels sharply - check readout before export.
Processing slow. Large sources take time; close other tabs.
Frequently asked questions
Does crop change video length?
No - only the visible frame changes, not duration.
Can I crop vertical video from horizontal?
Yes - draw a tall crop window. For preset 9:16 targets, Social Media Resize may be faster after a rough crop.
Related tools
- Social Media Resize - platform presets after crop
- Compress Video - reduce file size
- Trim Video - cut timeline sections