Rotate Image turns a photo 90°, 180° or 270°, or straightens it from −45° to +45° in 0.1° steps, optionally trimming the empty corners. Quarter turns keep every pixel; batch mode rotates a folder into one ZIP.
Redraws the image at the angle you pick. Quarter turns (90°, 180°, 270°) simply swap the width and height, so a 4032 × 3024 landscape photo becomes 3024 × 4032 portrait with every pixel intact. The Straighten slider adds a fine angle on top, from −45° to +45° in 0.1° steps, and the canvas expands to the rotated bounding box so no part of the picture is cut off. Trim empty corners then crops back to a clean rectangle with the photo’s original proportions.
Because the pixels themselves are turned, the result looks the same in every app, browser and email client. That is different from the orientation flag a phone writes into a photo, which some programs read and others ignore.
A scanned document at 2480 × 3508 that came out of the scanner sideways: one click on 90° right and it is 3508 × 2480, readable, and the file size barely changes as PNG. A beach photo with a horizon sloping 2° to the left: set Straighten to +2°, the 4000 × 3000 image grows to 4102 × 3138 with small transparent wedges in the corners, then Crop Image trims them away to a clean 3900 × 2900 frame.
The same 4000 × 3000 beach photo, this time with Trim empty corners on. The tool finds the largest 4:3 rectangle that fits inside the photo after a 2° turn, which is 3824 × 2868. You lose about 4.4% of the width and height, a thin border all round, and there are no wedges to fill or crop by hand.
A 4032 × 3024 phone photo straightened by 1.5° comes out at 3897 × 2922 with trimming, or 4110 × 3129 with corners kept. A portrait 3024 × 4032 shot leaning by only 0.5° keeps 2989 × 3985, so small corrections cost almost nothing. If the photo also came out sideways, set the quarter turn first; the header shows both the original size and the final size before you download.
Use it when a photo displays sideways on a website or in an email even though it looked fine on your phone, when a scan is upside down, or when a horizon or building lean needs a small correction. For mirror images (left becomes right) use Flip Image instead; rotation never mirrors. If you need an exact shape after straightening, follow up with Crop Image. To rotate the pages of a PDF, use the PDF tools rather than this one.
Avoid repeated small rotations of the same file. Each fine turn resamples the pixels, so straighten once to the final angle rather than nudging and downloading several times. If the rotated photo is now too large for an upload, finish with Resize Image or Image Compressor.
90° left / right / 180° add to the current turn, so two clicks on right equals 180°. The 0 / 90 / 180 / 270 control shows the total quarter turn; a new photo starts at 90°. Straighten is the fine angle; positive values rotate clockwise, and the nudge buttons move it by 0.1° or jump to ±0.5° and ±1°. Trim empty corners is only available once Straighten is not 0°. Background in Output fills the empty corners when the format has no transparency (JPEG); PNG and WebP leave them transparent. Same keeps the original file type, and Quality starts at 92.
Does rotating by 90° lose any quality? Not in the pixels: a quarter turn just moves every pixel to a new position. If the output is JPEG the file is re-encoded, so set quality to 92 or higher, or choose PNG for a lossless copy.
My phone photo looks sideways on my computer but not on my phone. Why? The phone stored the picture sideways and added an orientation flag. Some programs ignore that flag. Rotating here rewrites the pixels themselves, so the photo looks right everywhere.
What fills the corners when I straighten by a few degrees? The canvas grows so nothing is cut off. With PNG or WebP output the corners stay transparent; with JPEG they are filled with the background colour you choose. Turn on Trim empty corners for clean edges instead.
Can I rotate many photos at once? Yes. Drop several files or turn on Batch mode; every file gets the same turn and you download one ZIP.
How much does Trim empty corners cut off? It keeps the largest rectangle with the photo's own proportions that fits inside the tilted picture. On a 4:3 photo that is about 2% off each side at 1°, about 4.4% at 2° and nearly a fifth at 10°, so straighten as little as you need.
What is the difference between rotating and flipping? Rotating turns the picture around its centre, so text stays readable. Flipping mirrors it, so text reads backwards. A 180° rotation is not the same as flipping vertically: the rotation also swaps left and right.
Is the photo uploaded or its details kept? Nothing is uploaded; the turn is drawn on a canvas in your browser. The new file does not carry the camera, date or GPS details of the original, and it no longer needs an orientation flag.
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