Why does my phone photo look correct on my phone but sideways on my computer?

The phone stores the photo with EXIF Orientation set to a non-default value (commonly 6 or 8) and lets the viewer rotate on display. Apps that respect EXIF (Apple Preview, Chrome, modern Windows Photos) show it upright. Older viewers, some browsers, email clients that strip metadata, and printers ignore the tag and show raw pixels — sideways. Rotating with this tool rewrites the pixel data so every viewer renders the same way.

Will rotating reduce image quality?

Right-angle rotations (90, 180, 270 degrees) on PNG, WEBP-lossless, TIFF, and BMP are pixel-exact — no quality loss. JPEG right-angle rotation is lossless only when both image dimensions are multiples of the JPEG MCU (8 pixels for 4:4:4 chroma, 16 pixels for 4:2:0). Most camera output meets that constraint, but cropped JPEGs sometimes don't. Custom angles always involve resampling and introduce a small amount of softening regardless of format.

What's the difference between rotating and using EXIF orientation?

EXIF orientation is metadata — a single tag that tells viewers how to display the file. The pixel data stays as the camera stored it, so any viewer that ignores EXIF (or any process that strips metadata) shows the original orientation. Rotating the actual pixels burns the orientation in permanently. For photos that need to display correctly everywhere — print labs, email forwards, batch image pipelines — rotate the pixels.

Can I rotate a custom angle like 1.5 degrees to straighten a horizon?

Yes. Enter any value from -180 to 180 in 1-degree increments under Custom angle. Small corrections (1-5 degrees) for sloping horizons or skewed architecture lines are the most common use. The output canvas grows to fit the rotated rectangle, so you'll see transparent or filled corners — crop to clean them up.

Can I rotate a camera RAW file?

Yes. The tool decodes CR2, CR3, NEF, ARW, DNG, ORF, RAF, RW2, PEF, MRW, ERF, 3FR, and X3F using their respective decoders, applies the rotation, and writes the result as your chosen output format (typically JPEG, PNG, or TIFF). RAW-to-RAW rotation isn't supported because RAW files store undeveloped sensor data, not display-ready pixels.

How do I flip (mirror) instead of rotate?

Rotation and flip are different transforms — rotation pivots around the center, flip reflects across an axis. For horizontal or vertical mirroring use Flip Image, or rotate 180 to combine a horizontal and a vertical flip in one step.

Does rotation animated GIFs preserve all frames?

Yes — every frame is rotated with the same angle, frame timings and disposal methods are preserved, and the palette stays intact. File size may shift slightly because the rotated pixel layout compresses differently with LZW.

Can I batch-rotate hundreds of files with the same angle?

Yes. Drop multiple files in step 1, set the angle once in step 2, and the same rotation, output format, and compression settings apply to every file. The batch is processed on our servers.

Will the file size change after rotating?

For lossless right-angle rotations on PNG/TIFF, file size is usually within a few percent of the original. JPEG often grows or shrinks slightly because the new pixel layout encodes differently. Custom angles add transparent corners (PNG) or filled corners (JPEG/BMP) that change file size more noticeably. To keep size in check after rotation, set Target File Size (%) in step 3 or use the dedicated JPEG compressor. For format-specific tools, see Rotate JPG, Rotate PNG, Rotate HEIC, and Rotate GIF.