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privacy.storage_manager.language_settings
テーマ設定
画像トリミング
ドラッグ可能な選択ボックスと予設比率（自由/1:1/4:3/16:9）で画像を切り抜き。即座にプレビュー、単一ファイルダウンロード
使用方法
🚀 Quick Start
- Choose or drag image (supports PNG / JPEG (incl. JPG) / WebP / AVIF)
- Drag the image, or input W/H/L/T (Width/Height/Left/Top) in the coordinate panel for pixel-precise cropping
- Use rotate/flip/zoom as needed, or tap "Center" to align the crop area
- Use "Reset" to restore view; "Clear" to remove the image and return to upload
- Click "Download" to export the cropped result
📌 Common Scenarios
- Square avatar/cover (set W = H for a perfect square)
- Banner/poster aspect-ratio cropping (rotate/zoom first, then fine-tune)
- Remove black borders/whitespace and keep the subject
- Fix phone photo orientation: rotate first, then crop
🎛️ Crop Area & Controls
- Width (W): output width in pixels
- Height (H): output height in pixels
- Left (L): left offset of the crop area relative to the original image
- Top (T): top offset of the crop area relative to the original image
- Center: center the current crop area
- Zoom: zoom in/out the canvas to fine-select (does not change output pixels)
- Rotate: 90° counter/clockwise
- Flip: horizontal/vertical mirror
🧭 Tips
- Numeric inputs take effect instantly with debounce to avoid lags
- The crop area is constrained within the image to avoid overflow
- Continuous transforms on very large images may be slow; proceed step by step with short pauses
- On mobile, the bottom toolbar scrolls horizontally to reveal more actions
- Settings are not persisted; refreshing resets to defaults
⚠️ Limitations & Compatibility
- Very large images may consume memory/CPU; consecutive operations may slow down or fail
- On devices with safe areas/notches, space is narrower though adapted
- Modern browsers recommended (Chrome/Edge/Firefox/Safari 16+)
🔒 Privacy & Security
- すべての処理はお使いのブラウザ内で行われ、データが端末外へ送信されることはありません。
❓ FAQ
How to crop precisely to pixels?
Use the top-left coordinate panel to input W/H/L/T (↑/↓ to nudge; hold Shift/Alt to change step)
Why can't I zoom in further?
Zoom is limited at image bounds; try moving the area or zooming out first
How to export a specific format?
Currently supports single-image download. For converting formats, use the Image Converter.
How to recover from mis-operations?
Click "Reset" to restore default view; "Clear" removes the image and returns to upload.