How to rotate a PNG image
PNG is lossless, so rotating a PNG by 90° or 180° simply repositions the pixels and re-encodes them with zero quality loss — the output is pixel-identical to the input, just turned. Because PNG carries an alpha channel, flipping and quarter-turns never introduce any degradation, which makes it the safest format to rotate repeatedly.
This PNG rotator runs entirely in your browser. Drop in a PNG file, turn it left or right, spin it 180°, or mirror it with a flip, then download the result — no uploads, no sign-up, and no watermark.
How to use it
1. Drop your PNG image onto the drop zone or click to browse.
2. Rotate 90° left or right, or 180° for a full turn, and preview it live.
3. Flip horizontally for a mirror image or vertically to turn it upside down.
4. To fix a crooked photo, nudge the fine-angle control until the horizon is level, then download. Everything is processed on your device.
Rotate, flip, and straighten — which one you need
A quarter-turn (90° left or right) is what you want for a photo that came in sideways; two of them, or a single 180°, turns an upside-down image the right way up. A horizontal flip produces a mirror image, useful for selfies where text reads backwards or when you want a subject facing the other way; a vertical flip turns the picture upside down. Straightening is separate: it rotates by a small arbitrary angle to level a tilted horizon.
When you straighten a PNG by a small arbitrary angle, the canvas grows to hold the tilted image and the triangular corners left over are filled with full transparency. That keeps the result clean against any background, so a straightened logo or screenshot drops onto a page without a visible box around it.
Straightening a crooked photo
A slightly tilted horizon is one of the most common photo flaws, and a small rotation fixes it. Nudge the fine-angle control by a degree or two until vertical lines look upright and the horizon is level. Because the image tilts inside a larger canvas, straightening always grows the frame and leaves empty corners — crop in slightly afterwards if you want a clean rectangle with no filled corners showing.
Sideways phone photos and EXIF orientation
Photos from phones and cameras are often stored in their raw sensor orientation with a separate EXIF orientation tag that tells apps how to display them. Some programs honor that tag and some ignore it, which is why the same photo can look upright in one app and sideways in another. Rotating the image here bakes the correct orientation directly into the pixels, so it displays the right way up everywhere — websites, editors, and email clients alike — regardless of whether they read the EXIF tag.
Frequently asked questions
Does rotating a PNG reduce its quality?
No. PNG is lossless, so rotating by 90° or 180° repositions the pixels and re-encodes them exactly — the picture is pixel-identical, just turned. You can rotate and flip a PNG as many times as you like without any degradation.
What fills the corners when I straighten a PNG?
Transparency. Because PNG supports an alpha channel, straightening by a small angle grows the canvas and leaves the new triangular corners fully transparent, so the result sits cleanly on any background instead of showing a white box.
How do I rotate a photo that appears sideways?
Drop the photo in and use the rotate-left or rotate-right button until it is upright, then download. Phone photos often look sideways because the camera stored an EXIF orientation tag that some apps ignore; rotating here bakes the correct orientation into the pixels so it displays the right way everywhere.
How do I mirror or flip an image?
Use flip horizontal to create a mirror image (left and right swap, like a reflection) or flip vertical to turn it upside down. Both are pure pixel repositioning, so they add no quality loss beyond the normal re-encode of the format you save to.
Is this tool free?
Yes — rotating and flipping PNG images here is completely free, with no watermark, no account, and no limit on how many you process.
Are my images uploaded to a server?
No. All rotating, flipping, and straightening happens locally in your browser using the canvas engine — your images never leave your device, so it is safe to work with private or personal photos.