What aspect ratios are supported?

Eight presets: Free (any size), 1:1 (square), 4:3, 3:4, 16:9 (widescreen), 9:16 (vertical), 3:2, and 2:3.

What output formats can I download?

PNG (lossless), JPEG (adjustable quality), and WebP (adjustable quality). Choose the format that best matches your use case.

Does the crop preserve original image quality?

Yes. The crop operates on the original pixel data at full resolution. Quality is only affected by the JPEG/WebP compression setting you choose.

Can I crop to an exact pixel size?

Yes. The crop area Width and Height are shown in pixels in real time. Resize the handles to your desired dimensions, then crop. Use Free aspect ratio mode for custom pixel dimensions.

Does it work on mobile?

Yes. The canvas editor supports touch events — use one finger to move the crop area and drag the corner handles to resize it on a touchscreen device.

Image Cropper

Crop images to any size or aspect ratio with pixel-perfect precision — free, browser-based

Upload Image to Crop

Drag & drop an image, or click to browse

JPGPNGWebPGIFBMP

Free Online Image Cropper — Crop Images to Any Size or Aspect Ratio

Cropping an image is one of the most common editing tasks in photography, social media, web design, and content creation. Whether you need a perfect square for an Instagram post, a widescreen thumbnail for YouTube, a portrait crop for a profile photo, or a custom size for a website banner — getting the dimensions exactly right makes the difference between a polished result and an awkward-looking image.

The OmniWebKit Image Cropper is a fully browser-based cropping tool that gives you pixel-precise control over the crop area with an interactive drag-and-resize interface. Upload a JPG, PNG, WebP, GIF, or BMP image, position the crop box exactly where you want it, choose an aspect ratio (or crop freely), and download the result in PNG, JPEG, or WebP format. Everything runs locally in your browser — your images are never uploaded to any server.

The live preview panel updates in real time as you adjust the crop box, so you always know exactly what the output will look like before you commit to the crop. The rule-of-thirds grid helps you apply photographic composition principles — placing subjects at the intersections rather than dead center creates more dynamic, visually interesting images.

Aspect Ratio Guide — Which Ratio to Use?

1:1 — Square

The standard format for Instagram feed posts, profile pictures, app icons, and avatar thumbnails. Square crops work equally well on portrait and landscape images.

16:9 — Widescreen

The standard aspect ratio for YouTube thumbnails, video covers, website hero banners, and desktop wallpapers. Also the native format for most modern screens.

9:16 — Vertical

The format for Instagram Stories, TikTok videos, Instagram Reels, and Snapchat content. Portrait orientation optimised for mobile full-screen viewing.

4:3 — Classic

The traditional TV and early digital camera format. Still widely used for presentations (PowerPoint, Keynote), blog post headers, and photography from older cameras.

3:2 — Photo Print

The native format of most DSLR and mirrorless cameras, and the standard ratio for 4×6 and 6×4 photo prints. Ideal when printing photographs.

Free — Custom

No ratio constraint — the crop box can be resized to any width and height independently. Use this when you need an exact pixel dimension that doesn't match a standard ratio.

Output Formats Explained

PNG

Lossless compression — no quality loss. Best for screenshots, graphics, logos, illustrations, and images with flat colour areas. Supports transparency. Larger file size than JPEG.

JPEG

Lossy compression — smaller file size. Best for photographs and complex images where a small quality reduction is acceptable. Set quality above 85% for minimal visible loss.

WebP

Google's modern image format. Produces smaller files than both PNG and JPEG at similar quality. Supports both lossy and near-lossless compression. Supported in all modern browsers.

Frequently Asked Questions

Is my image uploaded to a server?+

No. All image processing runs entirely in your browser using the HTML5 Canvas API. Your image never leaves your device.

What image formats can I upload?+

You can upload JPG, PNG, WebP, GIF, and BMP images. All common web and camera image formats are supported.

What is the maximum image size?+

There is no strict limit. The tool handles any image size that your browser can hold in memory. Very large images (50MB+) may be slower to process on lower-powered devices.

What does the rule-of-thirds grid do?+

The grid divides the crop area into nine equal parts with two horizontal and two vertical lines. Placing the key subject of your image at or near one of the four intersection points creates a more visually balanced, dynamic composition — a classic principle of photography and visual design.

Can I set an exact pixel crop size?+

The crop area dimensions are displayed in real time in the info bar below the canvas (X, Y, Width, Height in pixels). Resize the crop handles until you reach your desired dimensions. For exact sizes, use the Free aspect ratio mode.

What output format should I use?+

Use PNG for screenshots, graphics, and anything with transparency. Use JPEG at 85–95% quality for photographs. Use WebP for web use where you want the best quality-to-size ratio and modern browser support.

Can I crop to a circular shape?+

This tool crops to rectangular regions. For circular crop output, use the PNG download (PNG supports transparency) and apply CSS `border-radius: 50%` in your web project, or use a dedicated circular crop tool.

Does the cropped image preserve the original quality?+

Yes. The crop is performed directly on the original image data using the Canvas API at the original pixel resolution. No quality is lost in the cropping process itself — only the lossy compression settings (for JPEG and WebP) affect output quality.