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CrateX.app

Image Cropper

Image Cropper

Supports image cropping, rotation, and flipping. Provides drag-and-drop selection, precise pixel input, and aspect ratio locking, suitable for avatar creation, cover cropping, and border removal.

Usage Instructions

🚀 Quick Start

  • Choose or drag image (supports PNG / JPEG (incl. JPG) / WebP / AVIF / HEIC / HEIF)
  • Drag the image, or input W/H/L/T (Width/Height/Left/Top) for precision; supports arrow keys and mouse wheel (Shift ×10, Alt ×5), left scrubber draggable.
  • Use rotate/flip/zoom panels: 90° quick turn, ±1° (Shift ±0.1°) micro-adjust, zoom ±1%/±5%; tap "Center" to align the crop.
  • Use "Reset" to restore view; "Clear" to remove the image and return to upload
  • Click "Download" to export the cropped result

📌 Common Scenarios

  • Square avatar/cover (set W = H for a perfect square)
  • Banner/poster aspect-ratio cropping (rotate/zoom first, then fine-tune)
  • Remove black borders/whitespace and keep the subject
  • Fix phone photo orientation: rotate first, then crop

🎛️ Crop Area & Controls

  • Width (W): output width in pixels
  • Height (H): output height in pixels
  • Left (L): left offset of the crop area relative to the original image
  • Top (T): top offset of the crop area relative to the original image
  • Center: center the current crop area
  • Zoom: zoom in/out the canvas to fine-select (does not change output pixels)
  • Rotate: 90° counter/clockwise
  • Flip: horizontal/vertical mirror

🧭 Usage Advice

  • Numeric inputs apply instantly with debounce; W/H/L/T map directly to export pixels. Zoom only affects view, not output resolution; left scrubber enables quick drag.
  • Zoom panel: ±1% (Shift 0.1%) and ±5% buttons plus slider. Rotation panel: ±1° (Shift 0.1°) micro steps, 90° quick buttons, slider range -45°~45°.
  • Crop stays within the image; shape and aspect ratio apply together to prevent overflow or distortion.
  • Continuous transforms on very large images may be slow; proceed step by step with short pauses
  • On mobile, the bottom toolbar scrolls horizontally to reveal more actions
  • Settings are not persisted; refreshing resets to defaults
  • Shape panel supports square, circle, rounded, ellipse, polygons, star, heart, cross, etc.; Fixed mode locks the current area to avoid accidental moves—switch back to Free to adjust.

⚠️ Limitations & Compatibility

  • Very large images may consume memory/CPU; consecutive operations may slow down or fail
  • On devices with safe areas/notches, space is narrower though adapted
  • Modern browsers recommended (Chrome/Edge/Firefox/Safari 16+)

🔒 Privacy & Security

  • All processing takes place in your browser; your data never leaves your device.

❓ FAQ

How to crop precisely to pixels?

Use the top-left coordinate panel to input W/H/L/T (↑/↓ to nudge; hold Shift/Alt to change step)

Why can't I zoom in further?

Zoom is limited at image bounds; try moving the area or zooming out first

How to export a specific format?

Currently supports single-image download. For converting formats, use the Image Converter.

How to recover from mis-operations?

Click "Reset" to restore default view; "Clear" removes the image and returns to upload.