What is the best 16:9 to 9:16 crop preview?

The best one does the math before you cut: the exact crop rectangle, how much of the frame you lose, and where text stays safe. This free previewer computes all three for any source size and anchor position, so you can reframe subjects before committing to the crop.

Is there a free 16:9 to 9:16 crop preview?

Yes — this crop preview is completely free with no signup. Enter your source dimensions, pick a target aspect (16:9, 9:16, 1:1, 4:5, or custom), choose a crop anchor, and get the crop rectangle, pixels lost, and safe zones instantly.

How to preview 16 9 to 9 16 crop?

Enter the source width and height, select 9:16 as the target, and pick an anchor (center keeps both sides even). The tool returns the crop rectangle coordinates and the percentage of pixels discarded — for 1920x1080 that is a centered 608x1080 crop keeping only about 32% of the pixels.

How does a 16:9 to 9:16 crop preview work?

Pure geometry: the tool computes the largest 9:16 rectangle that fits inside your frame, positions it by your anchor, and reports the coordinates plus the discarded pixel percentage. It outputs numbers the app draws as an overlay — it does not render an image itself. When the target is wider than the source, it switches to letterbox mode and tells you to pad with bars.

What is a 16:9 to 9:16 crop preview?

A 16:9 to 9:16 crop preview is a free online tool that gives you quick, accurate results without spreadsheets or manual math. This version runs entirely in your browser for instant, private results.

Is this 16:9 to 9:16 crop preview tool really free?

Yes, completely free with no account required. Use it as many times as you want — there are no usage limits or hidden paywalls.

How do I use this 16:9 to 9:16 crop preview tool?

Enter your details in the fields above and get instant results. Everything runs in your browser — no signup, no waiting, no data uploaded.

16:9 to 9:16 Crop Preview

What is 16:9 to 9:16 crop preview?

Aspect Ratio Crop Visualizer — Preview your 16:9 to 9:16 crop before you cut: get the exact crop rectangle, pixels lost, and text safe zones for any source size and anchor.

Pure rectangle math, no AI and no rendered image: if the target is wider than the source, the tool returns letterbox mode (full frame, pad with bars instead of cropping); otherwise cropW = min(sourceW, sourceH x targetRatio), cropH = min(sourceH, sourceW / targetRatio), positioned by the anchor and clamped inside the frame. pixelsLostPct = (1 - cropArea / sourceArea) x 100. Safe zones mark the center 80% of the crop for text and subtitles. The "visualizer" outputs computed coordinates (svgPreviewParams) that the app draws as an overlay — parameters, not a rendered picture.

Why use this 16:9 to 9:16 crop preview?

🎯

Built for 16:9 to 9:16 crop preview

Preview your 16:9 to 9:16 crop before you cut: get the exact crop rectangle, pixels lost, and text safe zones for any source size and anchor.

📋

Transparent & honest

The "visualizer" returns computed coordinates, not a rendered image — the overlay preview is drawn from them by the app.

🔒

Private by design

Everything runs in your browser. Your inputs never leave your device.

📱

Works everywhere

Fully responsive — perfect on desktop, tablet, and mobile. No app needed.

🔄

Regularly updated

Regularly maintained and reviewed to ensure accuracy.

💡

Free forever

No accounts, no limits, no watermarks. Use Aspect Ratio Crop Visualizer as much as you need.

How to use Aspect Ratio Crop Visualizer

1Enter the source video width and height in pixels.
2Pick the target aspect ratio (16:9, 9:16, 1:1, 4:5, or a custom W:H like 3:4).
3Choose the crop anchor — center, an edge, or a custom X/Y percentage position.
4Run the tool to get the crop rectangle, the percentage of pixels lost, and the text safe zones.
5Use the preview parameters to draw the overlay in your editor and reframe subjects before cropping.

What can you do with Aspect Ratio Crop Visualizer?

Crop landscape video to vertical preview — Preview your 16:9 to 9:16 crop before you cut: get the exact crop rectangle, pixels lost, and text safe zones for any source size and anchor.
Aspect ratio crop simulator — Preview your 16:9 to 9:16 crop before you cut: get the exact crop rectangle, pixels lost, and text safe zones for any source size and anchor.
16x9 to 9x16 safe area — Preview your 16:9 to 9:16 crop before you cut: get the exact crop rectangle, pixels lost, and text safe zones for any source size and anchor.

Good to know

The "visualizer" returns computed coordinates, not a rendered image — the overlay preview is drawn from them by the app.
Heavy crops (50%+ pixels lost) carry an explicit warning; reframe subjects toward the crop center.
Safe zones are the conventional center-80% guideline, not a platform guarantee.
Letterbox mode means no crop is possible — pad with bars or use a wider source.
Results are deterministic: the same inputs always produce the same rectangle.

How it works

Pure rectangle math, no AI and no rendered image: if the target is wider than the source, the tool returns letterbox mode (full frame, pad with bars instead of cropping); otherwise cropW = min(sourceW, sourceH x targetRatio), cropH = min(sourceH, sourceW / targetRatio), positioned by the anchor and clamped inside the frame. pixelsLostPct = (1 - cropArea / sourceArea) x 100. Safe zones mark the center 80% of the crop for text and subtitles. The "visualizer" outputs computed coordinates (svgPreviewParams) that the app draws as an overlay — parameters, not a rendered picture.

Examples

Landscape to Shorts

Centered 608x1080 crop; 68.3% of pixels lost with a heavy-crop warning.

Vertical to widescreen

Target is wider than the source — letterbox mode, pad with bars instead of cropping.

People also search for these — this tool handles them all:

16:9 to 9:16 crop previewcrop landscape video to vertical previewaspect ratio crop simulator16x9 to 9x16 safe area

Frequently asked questions

Explore more free tools in CapCut & Video Editing: