Image Cropper

Crop images to custom aspect ratios (16:9, 4:3, 1:1) and pixel boundaries in browser.

How to Use

Upload Image

Select a photo from your computer or phone.

Set Aspect Ratio

Select ratio preset (1:1, 16:9, 4:3) or adjust custom selection box.

In-browser Crop

Slice selected pixel bounding box onto off-screen Canvas.

Download

Save cropped image directly to your local storage.

Crop Images to Perfect Aspect Ratios & Dimensions

Remove distracting background clutter or trim photos to exact social media aspect ratios (1:1 square, 16:9 widescreen, 4:3, 9:16 portrait). Our interactive Image Cropper provides drag handles and aspect ratio lock presets for precise photo cropping.

Crop your photos 100% privately in your browser tab with zero server uploads.

Real-World Examples & Use Cases

Social Media Profile Pictures & Avatars

Crop photos into perfect 1:1 square ratios for Instagram profile pictures, LinkedIn avatars, and YouTube channel icons.

YouTube Thumbnail & Widescreen Cropping

Crop 4:3 photos into 16:9 widescreen frames for YouTube thumbnails and video presentation slides.

Instagram & TikTok Story/Reel Framing

Crop horizontal camera photos into vertical 9:16 portrait formats for Instagram Stories and TikTok posts.

Private Personal Photo Cropping

Crop family photos and ID pictures with 100% client-side privacy assurance.

How It Works

Canvas Bounding Box Crop Mathematics: 1. Selection Coordinates: Extract crop bounding box $[sX, sY, sW, sH]$. 2. Destination Canvas Sizing: Create canvas with width $= sW$ and height $= sH$. 3. Pixel Slice Draw: ctx.drawImage(sourceImg, sX, sY, sW, sH, 0, 0, sW, sH).

Frequently Asked Questions

Does cropping reduce photo pixel resolution?▼

Only discarded pixels outside the crop box are removed; full native resolution inside the selected crop box is preserved 100%.

Are my photos uploaded to a remote server?▼

No. All cropping is performed 100% locally inside your web browser tab.

What aspect ratio presets are available?▼

Presets include 1:1 (Square), 16:9 (Widescreen), 4:3 (Standard), 9:16 (Vertical Story), and Free Crop.

Can I crop PNG, JPG, and WebP images?▼

Yes! All standard image formats are supported.

Does this tool add watermarks?▼

No. ConvertWithMi generates 100% watermark-free images.

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