オンラインで画像を回転・反転
ワンクリックで画像を回転・反転・ミラー。無料、プライベート、瞬時 — すべてブラウザ内で完結します。
100%プライベート — ファイルがデバイスから送信されることはありません。すべての処理はブラウザ内で完結します。
ここに画像をドロップ
またはクリックして選択 — JPG、PNG、WebP対応
Preview
結果
回転・反転ツールの仕組み
このツールは、ブラウザ内蔵のCanvas APIを使用して、画像に回転・反転の変換を適用します。処理全体がお使いのデバイス上でローカルに実行されます。画像がサーバーに送信されることは一切ありません。
Tips for Image Rotation
- Use 90° increments for quick fixes — The 90° left and 90° right buttons are the fastest way to fix photos taken in the wrong orientation.
- Use the custom angle slider for fine adjustments — When a photo is slightly tilted, use the custom angle input to straighten it by just a few degrees.
- Flip horizontally for mirror images — The horizontal flip creates a mirror image, useful for fixing selfies that appear reversed.
- Flip vertically for reflections — The vertical flip turns the image upside down, useful for creating water reflection effects or fixing scanned images.
- Combine rotation and flip operations — You can apply both rotation and flip in sequence to achieve any orientation.
- Check orientation before exporting — Preview the final result carefully before downloading to ensure correct orientation.
When to Rotate Your Images
- Fixing sideways phone photos — Photos taken with a phone at an angle often save with incorrect orientation. Use 90° rotation to correct them.
- Straightening crooked horizons — A small custom angle rotation (1–3°) can perfectly level tilted horizon lines in landscape photos.
- Correcting scanned documents — Documents placed askew on a scanner come out tilted. Rotate them for better readability.
- Creating design variations — Flip product photos horizontally to create mirrored versions for layout variations.
- Fixing selfie mirror effect — Use horizontal flip to reverse mirrored selfies so background text reads correctly.
よくある質問
回転で画質は劣化しますか？
回転と反転はロスレスの幾何学的変換です — ピクセルは再配置されるだけで、リサンプリングは行われません。JPEGとWebP出力では92%品質の最小限の再エンコードが適用されます。PNG出力は完全にロスレスです。
EXIF方向情報はどうなりますか？
最新のブラウザは画像表示時にEXIF方向情報を自動的に適用します。このツールは表示されている視覚的な結果に対して動作するため、元のEXIFデータに関係なく期待通りの出力が得られます。
利用可能な出力形式は？
回転・反転した画像はJPEG、PNG、WebPとしてエクスポートできます。用途に最適なフォーマットをお選びください。
What is the difference between rotating and flipping?
Rotation turns the image around its center by a specified angle (90°, 180°, or a custom value). Flipping mirrors the image along an axis — horizontal flip reverses left and right (like a mirror), while vertical flip reverses top and bottom. You can combine both operations for any desired orientation.
Why do my phone photos appear sideways on some devices?
Phones store orientation information in EXIF metadata rather than actually rotating the pixel data. Some applications read this EXIF tag and display the photo correctly, while others ignore it — causing the image to appear sideways. Using ImgLab's rotate tool physically rotates the pixels, ensuring correct display everywhere.
Can I rotate multiple images at once?
The rotate tool processes one image at a time for precise control over each photo's orientation. After rotating and downloading one image, you can quickly drop the next one. Your rotation settings are preserved between images, so batch-correcting a series of photos with the same orientation issue is fast.
Does rotating change image resolution or quality?
For 90° and 180° rotations, the pixel data is rearranged without any quality loss — only the width and height are swapped (for 90° turns). For custom angles, the image is re-rendered on a canvas which may introduce very slight interpolation artifacts, but the difference is imperceptible in practice.