Image Cropper (Free / Aspect Ratio)

Draw, move, and resize a crop region. Lock to a common aspect ratio or go free-form. Export at original pixel fidelity.

No image loaded

Controls

Drop image here or use "Upload image"
Quick ratios

Tip: Drag to create. Drag inside to move. Use handles (corners or edges) to resize. Arrow keys nudge (? ? ? ?), hold Alt for x10 speed.

Examples (no upload needed)

Samples are generated on the fly to simulate real photos. No network requests.

Export

PNG ignores quality. JPEG/WebP use 1-100 (higher = better, larger file).

Mini Calculators

Pixels ? Aspect

Complete Missing Dimension

Scale Dimensions (%)

Fit / Cover into Box

PPI & Print Size

Cheat Sheet

Workflow

  1. Upload, drop, or load a sample image.
  2. Select an aspect: Free for unconstrained, or pick a common ratio.
  3. Drag on the canvas to draw the crop. Drag inside to move; use the 8 handles (corners & edges) to resize.
  4. Nudge with arrow keys (? ? ? ?); hold Alt for x10 steps.
  5. Enable "Thirds grid" to align composition.
  6. Choose format/quality, set filename, then Download crop (D).

Formulas

Aspect (n:d) = width ÷ height  ?  simplify n:d
Given ratio r = n/d
  height = round(width / r)
  width  = round(height x r)

Scale % s:
  width'  = round(width  x s/100)
  height' = round(height x s/100)

Contain (fit in box WbxHb):
  k = min(Wb/Wi, Hb/Hi), result = (Wixk, Hixk)

Cover (fill box WbxHb):
  k = max(Wb/Wi, Hb/Hi), result = (Wixk, Hixk)

RAM footprint (RGBA, uncompressed) ~ width x height x 4 bytes. File size varies by format & content.

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