Rotate Image 90 Degrees Left or Right in Your Browser

Scanners and phones do not always agree with the portal about which way is up. A marksheet fed into a flatbed sideways comes out as a landscape page with vertical text. A certificate photographed with the phone held horizontally can open the right way on the phone and sideways on a laptop. Verification staff reject or delay documents they have to tilt their head to read.

This tool turns the picture in quarter turns. Click Rotate left or Rotate right, watch the preview turn, and download. Two clicks in the same direction give 180 degrees for an upside-down scan. The file keeps its format, every one of its pixels, and its name with -rotated added before the extension.

Rotation is done in your browser. The image is never uploaded.

1. Click or drop the image. JPG, PNG and WebP open.
2. Click Rotate right to turn it 90 degrees clockwise, or Rotate left for 90 degrees anticlockwise.
3. Click again if the picture needs 180 degrees. A fourth click in the same direction brings it back to where it started.
4. Check the preview, which turns with each click.
5. Download from the panel that appears after the first click. Each click replaces the file with the current angle.

Each click redraws the full-resolution original on a canvas whose width and height are swapped for 90 and 270 degrees and left as they are for 180. Nothing is cropped or scaled. A 2480 × 3508 px A4 scan rotated right becomes 3508 × 2480 px with every pixel in its new place.

The rotation is always applied to the original file, never to the previous result. Clicking left and then right returns to the untouched image instead of stacking two re-encodes, and the download at 0 degrees is a plain re-save of the original.

The output is written as JPG at 92% quality unless the source is a PNG, which stays PNG. A WebP source comes out as JPG.

Fix the orientation at the image stage, before the scan is converted to PDF or merged with other pages. Once a sideways image is inside a PDF it has to be rotated page by page, and some viewers ignore a PDF's rotation flag while the portal's own viewer may honour it, so the document can look different to you and to the examiner.

Phones often store a photo sideways and add an orientation tag that tells viewers how to turn it. Most current browsers read that tag, so the preview here shows the picture the way you saw it on the phone. The downloaded file has the pixels physically turned and no orientation tag, which is why it looks the same everywhere, including on portals whose preview ignores the tag.

A landscape scan of a 10th or 12th marksheet is the most common case. One click of Rotate right or Rotate left, depending on which way the text runs, and the page reads top to bottom.

Only quarter turns are available. A scan that is tilted by two or three degrees cannot be straightened here; place the sheet against the scanner's edge guide and scan again, or use the deskew option in the scanner software. There is no mirror or flip either.

A JPG is re-encoded at a fixed 92%, so its file size can come out a little larger or smaller than the original. Repeated downloads do not compound the loss because every rotation starts from the original file.

The preview turns using the browser's display rotation and is capped at 256 px tall, so a large scan looks small on screen. The downloaded file is at full resolution regardless.