Image Rotator

The bounding box grows to fit the rotated rectangle, leaving triangles outside the original image. Those regions may be transparent in PNG output. Fill them in an editor if you need a solid matte. Empty corners are geometry, not a hole in the photo content.

A zero angle should match the original orientation with no meaningful rotation applied. You can still download a PNG that may be re-encoded by the export path. If the preview looks unchanged, that is correct behavior rather than a stuck slider. Use the 90 degree presets when you meant a quarter turn and nudged the control back to zero by accident.

Expanded canvases need more memory and can stall the tab. Resize first if needed, then rotate. Close other heavy pages and retry. Resource limits are a real failure scenario on multi-megapixel phone shots. In practice, re-run Image Rotator on a smaller sample after each change so you can see which input detail caused the mismatch. Keep the original nearby until you trust the export.

If the file still carries orientation tags, fix EXIF with a metadata-aware tool to avoid resampling. If pixels are already baked wrong, rotate the bitmap here. Many messy exports need the bitmap approach. Inspect metadata to choose. In practice, re-run Image Rotator on a smaller sample after each change so you can see which input detail caused the mismatch. Keep the original nearby until you trust the export.

CSS rotation is fine for on-page presentation without changing the asset. Bake pixels when the file itself must be upright for downloads, emails, or tools that ignore CSS. Pipelines that strip HTML need baked orientation. Pick based on the consumer. In practice, re-run Image Rotator on a smaller sample after each change so you can see which input detail caused the mismatch. Keep the original nearby until you trust the export.

Orthogonal rotates can map pixels to pixels cleanly; arbitrary angles require interpolation. Softness is expected at odd angles. Start from the master if you need another angle later. Cumulative odd rotates make quality worse. In practice, re-run Image Rotator on a smaller sample after each change so you can see which input detail caused the mismatch. Keep the original nearby until you trust the export.

A stale download, caching of an old file name, or clicking download before the latest angle applied can confuse you. Re-download with a new filename and confirm the preview first. Preview/download mismatch is an operational scenario to isolate carefully. Double-check the on-page preview before you treat the download as authoritative. If the preview and file disagree, re-export with a new filename to avoid cache confusion. Keep the original master untouched so you can retry cleanly.

Rotation is intended to run through browser Canvas with local download. That keeps private photos off remote editors. Share only the upright result. Clear the workspace after handling sensitive stills. In practice, re-run Image Rotator on a smaller sample after each change so you can see which input detail caused the mismatch. Keep the original nearby until you trust the export.