Image Flip & Rotate Tool

Phone cameras save portrait shots as landscape with an EXIF orientation tag, and some apps ignore that tag. A scanned document comes out upside down. A logo needs to be mirrored for a second side of a print run. These are 30-second fixes with Image Flip & Rotate, which applies every operation in the browser using the Canvas API so the file never leaves the device.

Rotation and flip operations combine freely. Rotating 90° clockwise and then flipping horizontally produces a different result from flipping first. Each button updates the preview instantly so the correct combination is visible before downloading.

Worked Example: Straightening a Scanned Page

Upload a scan that came out rotated 90° clockwise. Click 90° CCW once. The preview shows the page upright and the info bar updates from 1240 × 1754 px to 1754 × 1240 px — because a 90° rotation swaps width and height. Click Download to get the corrected file with the same name as the original plus -transformed.

• Flip Horizontal mirrors left-to-right (a selfie mirror effect). Flip Vertical mirrors top-to-bottom.Flip Both is equivalent to a 180° rotation with the axes also inverted — useful for watermark removal from certain sources.
• The Show original / Show result toggle lets you compare the two without downloading. Switching does not reset the transform — the non-obvious feature that catches most first-time visitors by surprise.
• Click Reset transform to undo all rotations and flips and return to 0°, no flip, without re-uploading the image. The button is disabled when no transform has been applied.

The Formula Behind Rotation and Flip

• Rotation is applied by translating the canvas origin to the centre, rotating the context by the angle in radians, then drawing the image centred at the new origin. A 90° or 270° rotation swaps the canvas width and height so the full image fits without cropping.
• Flip is implemented as a scale transform: scale(-1, 1) for horizontal flip, scale(1, -1) for vertical. The combined transform matrix is applied in a single draw call, so a rotation + flip does not degrade quality compared with applying them separately.
• Output is encoded at 95% quality for JPEG and losslessly for PNG. The pixel count never changes — rotation and flip are geometry operations, not resamples.

Format Notes: Accepted Types and Output Filename

• Accepts JPEG, PNG and WebP up to 20 MB. Files above the limit show File exceeds the 20 MB limit.
• The output format matches the input: a PNG source downloads as a PNG, a JPEG as a JPEG. The download filename is the original name with -transformed appended, so it never overwrites the source.
• All processing runs locally. The image is never sent to any server.