BYTETOOLS

Image Cropper

Crop images online to an exact rectangle with pixel-precise x, y, width and height inputs or aspect-ratio presets. Free, private and browser-based.

Drop an image to cropProcessed locally — never uploaded

What is the Image Cropper?

The ByteTools Image Cropper trims a picture down to the exact rectangle you need. Type precise pixel coordinates for the crop origin and its width and height, or pick a common aspect ratio like 1:1, 4:3 or 16:9 and let the tool size the selection for you.

  • Pixel-precise crop with numeric x, y, width and height
  • Aspect-ratio presets: 1:1, 4:3, 16:9, 3:2 and portrait
  • Live preview updates as you adjust values
  • Values are clamped to stay inside the image bounds
  • Lossless PNG output preserves crop quality
  • 100% private — images never leave your browser

How to use the Image Cropper

  1. 1

    Drop an image into the upload area, or click to browse for one.

  2. 2

    Enter the X and Y offset for the top-left corner of the crop.

  3. 3

    Set the width and height in pixels, or choose an aspect-ratio preset.

  4. 4

    Check the live preview of the cropped area.

  5. 5

    Click Download PNG to save the cropped image.

About the Image Cropper

The ByteTools Image Cropper trims a picture down to the exact rectangle you need. Type precise pixel coordinates for the crop origin and its width and height, or pick a common aspect ratio like 1:1, 4:3 or 16:9 and let the tool size the selection for you. A live preview shows the result before you save.

It is handy for squaring up profile pictures, cutting out a subject, preparing thumbnails, or fitting an image to a layout that demands a fixed ratio. Because you work in real pixel values, the crop is repeatable and exact rather than a rough drag.

All cropping runs 100% locally in your browser using the HTML canvas. Your photo is never uploaded to a server, so sensitive screenshots, documents and personal images stay entirely on your device.

Frequently asked questions

How do I crop an image to an exact size?

Upload the image, then type the width and height you need in pixels along with the X and Y start position. The tool crops exactly that rectangle and lets you download it, so the result is pixel-perfect rather than an approximate drag.

Can I crop a photo to a square or 16:9?

Yes. Pick the 1:1 preset for a perfect square or 16:9 for widescreen and the tool matches the height to your chosen width automatically. You can still fine-tune the exact pixel values afterward.

Does cropping reduce image quality?

No. Cropping only discards the pixels outside your selection; the pixels you keep are unchanged. The output is a lossless PNG, so the cropped region looks identical to the original at full quality.

Are my images uploaded when I crop them?

No. The entire crop happens in your browser with JavaScript and the canvas API. Nothing is sent to a server, which makes it safe for private screenshots, IDs and confidential images.

Guides for Image Cropper

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