Overview
Introduction
Sometimes you don't need a full dimension report — you just need to know if an image is wider than it is tall, taller than it is wide, or exactly square.
This tool answers that one question directly and clearly, decoding the file locally in your browser.
What Is PNG Landscape or Portrait Checker?
A focused orientation checker built on the same dimension analysis used by this site's PNG Dimensions Finder, but reduced to a single clear answer with explicit isLandscape/isPortrait/isSquare booleans.
It reports the exact width and height it compared, alongside the orientation label.
How PNG Landscape or Portrait Checker Works
The uploaded PNG is decoded into a pixel buffer via canvas to get its true width and height, then a thin wrapper function calls the shared dimension logic and converts its orientation label into three explicit boolean flags.
This keeps the orientation math in one tested place while giving this tool its own simple, purpose-built output shape.
When To Use PNG Landscape or Portrait Checker
Use it when a form, template, or upload requirement specifies 'landscape only' or 'portrait only' and you need a quick confirmation before submitting.
It's also handy for batch-sorting a folder of images by orientation before a layout task.
Often used alongside PNG Dimensions Finder and PNG Analyzer.
Features
Advantages
- Gives one unambiguous answer instead of requiring you to compare numbers yourself.
- Based on the image's real decoded pixel dimensions, not filename or metadata assumptions.
- Runs entirely client-side, so the file never leaves your device.
Limitations
- Only reports orientation — for the numeric aspect ratio or megapixel count, use the PNG Dimensions Finder or PNG Analyzer.
- An image only one pixel off from square (e.g. 500x501) is reported as portrait, not square; there's no 'nearly square' tolerance.
Examples
Best Practices & Notes
Best Practices
- Check orientation before batch-uploading to a template that expects a specific shape, to avoid stretched or cropped results.
- Combine with the PNG Rotator if an image comes back the wrong orientation and needs correcting.
Developer Notes
This lib function is a thin wrapper around findPngDimensions rather than re-deriving the width/height comparison, so the orientation logic stays in exactly one tested place across both tools; only decoding the upload into width/height happens in the browser-only component.
PNG Landscape or Portrait Checker Use Cases
- Confirming an image matches a template's required orientation before upload
- Sorting a batch of images by landscape/portrait/square before a layout task
- Quickly checking a screenshot or export came out the expected shape
Common Mistakes
- Assuming an image's orientation from its filename or thumbnail preview rather than checking the actual decoded dimensions.
- Expecting 'square' to include near-square images — the check is an exact pixel comparison.
Tips
- If an image needs to change orientation, use the PNG Rotator tool afterward to rotate it 90 degrees.
- Run this on a batch of exports to catch any that accidentally came out portrait when landscape was expected, or vice versa.