How do I use the AI Smart Crop tool to crop an image?

Open the AI Smart Crop page and load a JPEG, PNG, or WebP image by dragging it onto the upload zone, browsing, or pasting with Ctrl+V / Cmd+V. Pick a target aspect ratio (1:1, 4:5, 16:9, 9:16, or Original) — the AI detects the main subject and centres it within that ratio. Use the Cropped / Original + Crop Box toggle to check the framing, then click Download. It is completely free forever and runs in your browser with no upload; the model downloads once (~44 MB) and then works fully offline.

Is the AI Smart Crop tool free?

Yes — automatically cropping images while keeping the subject centred with AI is completely free, forever. No account, no sign-up, no trial, and no per-image charge. The subject-detection model runs entirely on your device via WebAssembly; your images are never uploaded to any server. The site is ad-supported.

What is AI smart crop?

AI smart crop uses a saliency / subject detection model to automatically identify the main subject in an image (person, product, animal, etc.) and compute the optimal crop window that keeps the subject fully visible and centred within the target aspect ratio.

Does the tool upload my image to a server?

Never. The AI model runs in your browser via WebAssembly and images never leave your device — this is enforced in code by a runtime network guard that blocks any attempt to send your file off-device. You can verify it yourself: open DevTools → Network and watch — nothing is uploaded.

Does it require an internet connection?

Only for the first-time model download (~44 MB). Once downloaded the model is stored in the browser Cache API and cropping works fully offline, even without a network connection.

How long does the first run take?

The first run has two stages: (1) model download (roughly 2–10 seconds depending on connection speed) and (2) ONNX Runtime initialisation (1–2 seconds). After that, inference per image takes about 0.5–3 seconds, and subsequent runs skip the download entirely.

Can I use it offline?

Yes. After the first download the model is stored in the browser Cache API and smart crop runs with no network connection. Even after closing and reopening the tab the model stays cached.

Which aspect ratios are supported?

Five presets are available: 1:1 (square), 4:5 (portrait), 16:9 (widescreen), 9:16 (vertical / social media), and Original (keep the source ratio). Switching ratio re-crops the image instantly.

How much storage space does the AI model use?

The subject detection model is approximately 44 MB. It is downloaded once and cached by the browser Cache API for offline use.

What if the AI crop result is not quite right?

Switch to a different aspect ratio to re-crop instantly, and use the Original + Crop Box preview to see exactly where the AI placed the crop window over your source image, so you can confirm the framing before downloading.

AI Smart Crop — Automatic Subject-Aware Image Cropping

Smart Crop is a 100% free tool that automatically crops images to a chosen aspect ratio while keeping the main subject centred. The AI model runs entirely on your own device via WebAssembly — your images are never uploaded to any server. It is free forever with no sign-up. The model downloads once (~44 MB), is cached in your browser, and then runs fully offline.

AI smart crop — automatically detects the subject and keeps it centred, supports 1:1, 4:5, 16:9, 9:16 and original ratios, free forever, model runs locally, images never uploaded.

100% Free — Forever. No fees, ever.
Private: files are processed locally in your browser and never sent to a server.
No upload, no account, no sign-up.

Open the smart crop tool
Visit the AI Smart Crop page. It is free with no sign-up, no installation, and no account.
Load your image
Drag and drop a JPEG, PNG, or WebP image onto the upload zone, click to browse, or paste with Ctrl+V / Cmd+V. Your image stays on your device — it is never uploaded.
Choose an aspect ratio
Pick a target ratio: 1:1 (square), 4:5 (portrait), 16:9 (widescreen), 9:16 (vertical / social media), or Original (keep the source ratio).
Run AI smart crop
On first use the subject-detection model (~44 MB) downloads once and is cached; then the AI locates the main subject (person, product, animal, etc.) and computes the crop window that keeps it centred and fully visible. Changing the ratio re-crops instantly.
Preview and download
Use the Cropped / Original + Crop Box toggle to check the framing against the source, then click Download to save the cropped image to your device.

How do I use the AI Smart Crop tool to crop an image?: Open the AI Smart Crop page and load a JPEG, PNG, or WebP image by dragging it onto the upload zone, browsing, or pasting with Ctrl+V / Cmd+V. Pick a target aspect ratio (1:1, 4:5, 16:9, 9:16, or Original) — the AI detects the main subject and centres it within that ratio. Use the Cropped / Original + Crop Box toggle to check the framing, then click Download. It is completely free forever and runs in your browser with no upload; the model downloads once (~44 MB) and then works fully offline.
Is the AI Smart Crop tool free?: Yes — automatically cropping images while keeping the subject centred with AI is completely free, forever. No account, no sign-up, no trial, and no per-image charge. The subject-detection model runs entirely on your device via WebAssembly; your images are never uploaded to any server. The site is ad-supported.
What is AI smart crop?: AI smart crop uses a saliency / subject detection model to automatically identify the main subject in an image (person, product, animal, etc.) and compute the optimal crop window that keeps the subject fully visible and centred within the target aspect ratio.
Does the tool upload my image to a server?: Never. The AI model runs in your browser via WebAssembly and images never leave your device — this is enforced in code by a runtime network guard that blocks any attempt to send your file off-device. You can verify it yourself: open DevTools → Network and watch — nothing is uploaded.
Does it require an internet connection?: Only for the first-time model download (~44 MB). Once downloaded the model is stored in the browser Cache API and cropping works fully offline, even without a network connection.
How long does the first run take?: The first run has two stages: (1) model download (roughly 2–10 seconds depending on connection speed) and (2) ONNX Runtime initialisation (1–2 seconds). After that, inference per image takes about 0.5–3 seconds, and subsequent runs skip the download entirely.
Can I use it offline?: Yes. After the first download the model is stored in the browser Cache API and smart crop runs with no network connection. Even after closing and reopening the tab the model stays cached.
Which aspect ratios are supported?: Five presets are available: 1:1 (square), 4:5 (portrait), 16:9 (widescreen), 9:16 (vertical / social media), and Original (keep the source ratio). Switching ratio re-crops the image instantly.
How much storage space does the AI model use?: The subject detection model is approximately 44 MB. It is downloaded once and cached by the browser Cache API for offline use.
What if the AI crop result is not quite right?: Switch to a different aspect ratio to re-crop instantly, and use the Original + Crop Box preview to see exactly where the AI placed the crop window over your source image, so you can confirm the framing before downloading.

Saliency detection automatically identifies the regions of an image that attract the most visual attention, and is widely used in automatic cropping.
Running a model in ONNX Runtime Web with a WebGL backend typically achieves inference times ranging from tens of milliseconds to a few seconds, depending on image size and device performance.
The browser Cache API stores model weights in user-authorised storage, enabling fully offline inference.
The 9:16 (vertical) ratio is the standard format for short-video platforms such as Instagram Reels and TikTok; 16:9 is the standard for most desktop displays and YouTube.
AI cropping typically has a significant advantage over traditional centre cropping for preserving faces or product subjects — especially when the subject is not centred in the original image.

📸 AI Smart Crop — Automatic Subject-Aware Image Cropping

AI Smart Crop — Automatic Subject-Aware Image Cropping