Image Rotator

About Image Rotator

Welcome to the Image Rotator, a powerful and user-friendly tool for rotating images by any angle. Whether you need to fix a tilted photo, rotate images for a specific layout, or batch process multiple files, this tool makes it quick and easy - all within your browser with complete privacy.

Key Features

How to Use

1. Upload Images: Drag and drop your images into the upload area, or click to browse and select files. Supports JPG, PNG, GIF, WebP, and more.
2. Choose Rotation Angle: Use the quick preset buttons (90°, 180°, 270°) for common rotations, or drag the slider for any custom angle. Watch the visual dial and live preview update.
3. Review Preview: Check the live preview to see exactly how your rotated image will look. Adjust until you are satisfied.
4. Download Results: Click "Rotate and Download" to process your images. Download each individually or grab all as a ZIP file.

Common Use Cases

Supported Formats

This image rotator supports all common image formats:

• JPG/JPEG: Most common photo format, widely compatible
• PNG: Supports transparency, ideal for graphics
• GIF: Static images (animated GIFs will be converted to first frame)
• WebP: Modern format with excellent compression
• BMP: Bitmap images
• TIFF: High-quality images from cameras and scanners

Rotated images are saved as high-quality PNG files to preserve image quality and support transparency.

Technical Notes

How Image Rotation Works

When an image is rotated, the output canvas dimensions may change. For 90° and 270° rotations, the width and height are simply swapped. For other angles, the new dimensions are calculated using trigonometry to ensure the entire rotated image fits without cropping:

• New Width = |cos(angle)| × original_width + |sin(angle)| × original_height
• New Height = |sin(angle)| × original_width + |cos(angle)| × original_height

Browser-Based Processing

This tool uses the HTML5 Canvas API and JavaScript to perform all image processing directly in your web browser. This approach offers several advantages:

• Privacy: Your images never leave your device
• Speed: No upload/download time for processing
• Offline capable: Works even without an internet connection after the page loads
• No limits: No file size restrictions or processing quotas

Frequently Asked Questions

How do I rotate an image online?

To rotate an image online: 1) Upload your image by dragging and dropping or clicking to select. 2) Choose a preset rotation (90, 180, or 270 degrees) or use the slider for a custom angle. 3) See the live preview of your rotated image. 4) Click "Rotate and Download" to process and save your image. The tool works entirely in your browser, so your images are never uploaded to any server.

What image formats are supported?

This image rotator supports all common image formats including JPG/JPEG, PNG, GIF, WebP, BMP, and TIFF. Rotated images are saved in PNG format to preserve quality and transparency.

Can I rotate multiple images at once?

Yes, you can rotate multiple images simultaneously. Simply select or drag multiple files at once. All images will be rotated by the same angle you choose. After processing, you can download each image individually or download all rotated images as a ZIP archive.

Is my image data secure when using this tool?

Yes, your images are completely secure. This image rotator processes everything directly in your web browser using JavaScript and HTML5 Canvas. Your images are never uploaded to any server - all processing happens locally on your device.

Why does rotating an image sometimes make it larger?

When you rotate an image by an angle other than 90, 180, or 270 degrees, the output canvas must be larger to fit the rotated image without cropping. The new dimensions are calculated using trigonometry to ensure the entire rotated image fits within the frame.

Additional Resources

• Canvas Rotate API - MDN Web Docs

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