Image Rotator

90° multiples on JPG

JPEG stores data in 8×8 DCT blocks. Rotating by 90°, 180° or 270° can be done by shuffling these blocks without re-encoding, “lossless rotation”. Works when both dimensions are multiples of 8 (true for almost every camera photo). The tool uses this path automatically.

Arbitrary angles

For 1°, 2°, 15° or any non-90° rotation, each new pixel is a weighted sample of the original grid. The tool uses bicubic interpolation for smooth results.

Exposed corners

Rotating a rectangle by a non-90° angle leaves triangular gaps at each corner. Fill options:

• Transparent (PNG only): the gaps are transparent pixels.
• White / black / any HEX: solid fill for a clean look.
• Edge-pixel extension: repeats the nearest pixel outward, handy for scanned documents where white is expected.
• Crop to inscribed rectangle: removes the corners entirely by cropping to the largest rectangle that fits inside the rotated image.

Auto-straighten

If you have a photo with a tilted horizon, use the “auto” mode, the tool detects the dominant horizontal edge (usually the horizon) and rotates to make it level. Works reliably when there is a clear straight line.

EXIF orientation and real rotation

Phone photos sometimes store the rotation as an EXIF flag rather than rotating the pixel grid. This rotator bakes the rotation into the pixel data and writes EXIF orientation = 1, so the result looks identical in every viewer.