Rotate BMP Image Online
Rotate BMP images online and turn bulky files into lean PNG, JPEG, or WEBP. Free, private, no watermark, no upload.
How to Rotate a BMP Online for Free
Rotate any BMP in three quick steps: add your image, set the angle or flip, and export—no software needed, all in your browser.
Step 1
Upload Your BMP
Step 1. Drop a BMP file into the tool and a live preview of the rotated image appears right away.
Step 2
Set Angle or Flip
Step 2. Drag the angle slider, tap 90 or 180, or flip horizontally or vertically as needed.
Step 3
Download Result
Step 3. Click Download and save the rotated PNG, JPG, or WEBP straight to your device.
Rotate Huge BMP Files Into Lean Images
BMP is one of the oldest image formats still in use, and it shows in the file size. Because BMP stores pixels with little to no compression, a single photo can balloon to tens of megabytes, making it painfully slow to email, upload, or embed on the web. You usually meet BMPs when exporting from legacy software, scanners, or specialized hardware that defaults to the raw format. The good news is that BMP’s bulk is almost entirely waste, and rotating it into a modern format recovers the same picture at a tiny fraction of the size without desktop software. Modern workflows rarely need raw BMP, so turning it into a compact image is almost always the right call for speed and sharing.
UnoIMG’s free BMP rotator turns that heavy file into a lean image in seconds. Drop a single BMP and a live preview rotates as you drag the angle slider from 0 to 359 degrees, or tap a button for a clean 90-degree turn, a 180 flip, or a horizontal or vertical mirror. Because a browser canvas cannot keep the BMP format, the rotated result is saved as PNG (which keeps any transparency), JPEG, or WEBP of your choice—a compact, web-ready image instead of the bulky original. A quality slider fine-tunes JPEG/WEBP output, Max Width shrinks the export, and any tilt that is not a multiple of 90 keeps the whole picture visible with transparent or white corners.
The savings show up wherever BMPs appear. Office teams rotate scanned documents and screenshots so they email instantly; developers convert raw assets into compact web graphics; designers modernize legacy files for today’s platforms. E-commerce stores turn bulky product captures into fast-loading listings, and agencies prepare client deliverables that arrive quickly over any connection. Teachers rotate worksheet scans for lesson packs, and researchers fix lab captures for quick sharing. Archivists straighten scanned records for fast retrieval. Each result appears as a live preview, so you can fine-tune the angle before you save the file.
Best of all, the process is private and free. Rotation runs entirely in your browser, so your BMPs are never uploaded to a server or stored anywhere—nothing leaves your device, which keeps sensitive files fully on your machine. There is no watermark, no account, and no desktop software to install. Whether you keep the PNG, switch to JPEG, or export WEBP, UnoIMG fits naturally into any daily routine, helping you straighten a lighter, faster image in just a few seconds. The bulky original stays on your device, and only the lean rotated image is what you take away.
Any Angle
Rotate from 0 to 359 degrees with a slider, plus quick 90 and 180 degree buttons.
Flip & Mirror
Flip the image horizontally or vertically, or reset to the original in one click.
Exports as PNG/JPG/WEBP
Because BMP can't be kept, the rotate is saved in a compact format.
Shrink Bulk
The export is a lean PNG, JPEG, or WEBP instead of the heavy original file.
Clean Corners
Non-90 turns get transparent (or white) corners so the whole picture stays visible.
Private & Free
Everything runs in your browser, never uploaded, with no watermark and no cost.
FAQ
Frequently Asked Questions
BMP stores pixels with little or no compression, so even a small photo can weigh megabytes. Rotating it into PNG, JPEG, or WEBP removes that wasted space while keeping the same picture.
Yes. The angle slider runs from 0 to 359 degrees, so you can set any tilt such as 15 or 30 degrees. The canvas keeps the whole picture visible, with transparent corners around the tilt.
Use the quick buttons: 90 degrees clockwise, 90 counterclockwise, or a half turn of 180 degrees. These snap cleanly with no extra space around the image at all, ready for you to use.
Yes. Flip H mirrors the image left to right and Flip V mirrors it top to bottom. Reset returns it to the original orientation instantly with a single click, whenever you need it.
It is saved as PNG, JPEG, or WEBP, because a browser canvas cannot keep the BMP format. You get a compact, web-ready image instead of the bulky original file, ready to use.
Yes. Any angle that is not a multiple of 90 leaves triangular corners. For PNG and WEBP they stay transparent; for JPG they are filled with white so nothing is cut off.
Yes. Everything runs in your browser, so there is nothing to install. Open the page, drop a BMP, rotate, and download with no account or sign-up of any kind required.
Yes. Rotation runs entirely in your browser, so your BMPs are never uploaded to a server or stored anywhere. Nothing leaves your device, keeping your files fully private on your own machine.
No. UnoIMG adds no watermark to any rotated result, and there is no account or sign-up. You download a clean image straight to your device. The tool is free for everyone to use.
Max Width scales the exported image down to a set pixel width while keeping the rotation. Set it to 0 to keep the original size, or enter a value to shrink large BMPs for the web.