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Straighten Photo

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Straighten Photo lets you rotate by a precise small angle and expand the canvas to retain the corners. Choose a photo to begin.

Method and calculation

Rotate by a precise small angle and expand the canvas to retain the corners.

Inputs and settings

Straighten Photo accepts Clockwise angle (degrees) (minimum -45, maximum 45); Exposed background.

Worked example

Straighten Photo example — Clockwise angle (degrees): 3; Exposed background: "#ffffff". Preview instructions: Select a still photo, then use Clockwise angle (degrees): 3; Exposed background: "#ffffff". The result is a PNG with rotate by a precise small angle and expand the canvas to retain the corners.

Output and limitations

Small clockwise or counterclockwise rotations correct a tilted horizon. The bounding rectangle expands according to sine and cosine so corner content is retained. Newly exposed triangles receive the selected background color instead of an automatic crop.

Technical references: Canvas pixel manipulation

Straighten Photo FAQs

Straighten Photo applies the following rule to your input: Rotate by a precise small angle and expand the canvas to retain the corners. The visible preview shows the resulting image effect.
Straighten Photo has these boundaries: Processes one still image locally. PNG export uses a maximum 4096-pixel source edge; effects may expand the canvas. Start by checking the clockwise angle (degrees) field against the units or format shown.
Straighten Photo provides this sample: Select a still photo, then use Clockwise angle (degrees): 3; Exposed background: "#ffffff". The result is a PNG with rotate by a precise small angle and expand the canvas to retain the corners.. The preview can be inspected before saving.

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