Image Cropper
Crop images with freehand selection, fixed aspect ratios, or social media presets.
Drop image files here
or
Supported formats: JPEG, PNG, WebP, GIF, BMP, HEIC — multiple files supported
What Is Image Cropping?
Image cropping is an online tool that trims away unwanted areas of photos and images, keeping only the portion you need. Perfect for creating social media profile pictures, removing margins from product photos, and adjusting images before inserting into presentations.
sakutto.ai's image cropper processes everything in your browser — your images are never uploaded to any server. Lock aspect ratios (1:1, 16:9, 4:3, etc.) for purpose-specific cropping with ease.
Select areas intuitively by dragging, or specify precise pixel dimensions. Great for squaring e-commerce product images, cutting ID photos to standard sizes, and more. Free, no sign-up required.
How to Crop Images
- Drag & drop an image file or use the file picker to add it
- Drag the crop area on the preview to adjust it (resize using corner and edge handles)
- Optionally select an aspect ratio preset or output format
- Click "Start Crop" to crop and download the result
Features of sakutto's Image Cropper
- Privacy Protection
- Images are never uploaded to a server — all processing happens entirely in your browser
- Visual Cropping
- Intuitively drag the crop area directly on the image preview
- Aspect Ratio Presets
- One-click presets for 1:1, 4:3, 16:9, and social media sizes (Instagram, X, YouTube, etc.)
- Rule of Thirds Grid
- Display a rule-of-thirds overlay to guide your photo composition
- Format Conversion
- Convert to JPEG, PNG, or WebP
- Multi-File Support
- Set individual crop areas for each file and download them all as a ZIP
Use Cases for Image Cropping
Social Media Posts
Crop images to the ideal aspect ratio for each platform — Instagram squares, X/Twitter 16:9, YouTube thumbnails, and more.
Profile Pictures
Crop just the face area into a 1:1 square — perfect for social media avatars and profile photos.
Websites & Blogs
Crop OGP images and featured images to specific dimensions for a consistent, polished design.
Removing Unwanted Areas
Cut out excess whitespace or distracting backgrounds. Great for emphasizing your subject.
Why Image Cropper on sakutto is safe
Many online tools upload your files to external servers for processing. This tool never sends your image files to any server — everything is processed entirely in your browser.
* Some AI-powered tools require server-side processing. Tools that send data to a server will always notify you beforehand.
| Comparison | Typical online tools | sakutto |
|---|---|---|
| Where data is sent | Uploaded to external servers | Nowhere — processed in your browser |
| Data leak risk | Risk during transfer and server storage | No risk — no network transfer occurs |
| External traffic | File data travels over the internet | No file data appears in network logs |
| Offline use | Not possible (server required) | Works offline after initial load |
How browser-based processing works
- WebAssembly (WASM): Processes image files in your browser at near-native speed. No server communication occurs.
- Web Workers: Runs on a background thread separate from the main thread, so your browser stays responsive during processing.
- After processing, your browser automatically frees the data from memory. No image files remains outside your device.
For IT security teams: How to verify
You can verify that sakutto never sends your image files externally by checking the Network tab in your browser's DevTools while using the tool. You'll see that no requests involving your image files are made. This can also serve as documentation for your IT security team.
Frequently Asked Questions
Are my files uploaded to a server?
No. All processing is done entirely in your browser — your image files are never sent to any external server. You can safely use this tool even with images containing personal information.
What image formats are supported?
JPEG, PNG, WebP, GIF, BMP, and HEIC (iPhone photos) are supported. You can also convert to JPEG, PNG, or WebP when cropping.
Can I crop with a fixed aspect ratio?
Yes. You can lock to standard ratios like 1:1 (square), 4:3, and 16:9, as well as social media presets for Instagram, X/Twitter, YouTube, OGP images, and more.
How many files can I crop at once?
The free version supports up to 5 files per batch (max 10 MB each). The Pro plan (coming soon) will remove these limits.
Does cropping reduce image quality?
PNG output is lossless. For JPEG and WebP output, you can adjust quality with the slider — the default is 85% for high quality. Choosing the original format keeps quality loss to a minimum.
What is the rule-of-thirds grid for?
It's a guide overlay based on the rule of thirds in photography. Placing your main subject at the intersections of the grid lines creates a more balanced composition.
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