Crop an Image to a 4:3 Aspect Ratio
Need a photo that fits a 4:3 frame? Upload it, move the locked 4:3 selection to the part you want to keep, and download the result at the exact size you need. Everything happens in your browser.
Drop an image here to crop it to 4:3
JPG, PNG or WebP up to 50 MB. HEIC works in Safari.
Private by designYour image is opened and cropped in your browser. It isn’t uploaded to a server.
FormatsOpen JPG, PNG and WebP (HEIC in Safari). Save as JPG, PNG or WebP where your browser supports it.
4:3 · landscapeFor example 1200 × 900 px. Any size with the same proportions works.
What Is a 4:3 Image Ratio?
A 4:3 image ratio means the picture is four units wide for every three units tall. The width is about 1.33 times the height, so the frame is only a little wider than a square. That modest shape is why 4:3 feels balanced for most everyday subjects.
The ratio describes shape, not size. An image that is 800 × 600 pixels and one that is 1200 × 900 pixels are both 4:3, because dividing each side by the same number (200 and 300) gives 4 and 3. To check any image, multiply its height by 4 and its width by 3; if the results match, it’s exactly 4:3.
When Should You Use a 4:3 Crop?
Many phone cameras save photos in 4:3 by default, so cropping to 4:3 is often about tidying a composition rather than changing its shape. It’s a practical choice for:
- general photography and travel photos where you want room around the subject;
- slides and documents built on a 4:3 template;
- layouts with a moderately wide image slot, such as blog cards or catalogue grids;
- older displays and tablet-style screens that are close to 4:3.
Check the destination before you crop. Many modern screens and slide templates are 16:9 widescreen instead, and a 4:3 image placed in a 16:9 space leaves bars at the sides.
How to Crop an Image to 4:3
- Choose an image or drag it onto the upload area. JPG, PNG and WebP work in every modern browser.
- The 4:3 frame appears over your photo, already locked to the ratio. Drag it to move it, or drag a corner to make it bigger or smaller. You can also use the zoom slider.
- Rotate the photo if it’s sideways, and turn on the grid if you want help with composition.
- Check the output size. It starts at the full size of your crop; type a width or height to make the download smaller, and the other side updates to keep exactly 4:3.
- Pick JPG, PNG or WebP, then select Download.
Tip: if your photo is already 4:3, the frame covers the whole image at first. Zoom in a little to trim distracting edges while keeping the same shape.
Cropping vs resizing
Cropping cuts away the area outside the frame and changes the shape to 4:3. Changing the output size then resizes what’s left, scaling it up or down evenly, so nothing is ever stretched. To change only the pixel size of an image without cropping it, use an image resizer; to shrink the file afterwards, an image compressor can help.
Recommended 4:3 Image Dimensions
Every size below is exactly 4:3. Choose one at least as large as the space the image will fill.
| Size (px) | Typical use |
|---|---|
| 640 × 480 | Small thumbnails and email images |
| 800 × 600 | Blog and article images |
| 1024 × 768 | Older 4:3 displays and simple slides |
| 1200 × 900 | Larger web images and product galleries |
| 1600 × 1200 | Full-width web images and slides |
| 4032 × 3024 | Typical full-size output from a 12 MP phone camera |
Tips for Getting a Clean 4:3 Crop
- Keep your subject off the very edge. A 4:3 frame is fairly tall, so there’s usually room above and below. Use it rather than cropping right up to someone’s head.
- Straighten first. If the photo is sideways, rotate it before positioning the frame.
- Watch the resolution. Each zoom step throws away pixels. The “Crop” figure under the preview shows how many you’re keeping; if it’s smaller than the size you need, zoom out.
- Look at all four edges. Before downloading, check that nothing important, such as a hand, a product edge or text, is in the shaded area.
Choosing between this and the camera-style 3:2 ratio? 3:2 is wider (1.5 times the height rather than 1.33), so it trims more from the top and bottom of a phone photo.
Crop to Another Aspect Ratio
Frequently Asked Questions
How do I calculate 4:3 dimensions?
Multiply the width by 0.75 to get the height, or multiply the height by 4/3 (about 1.333) to get the width. For example, a 1200-pixel-wide 4:3 image is 900 pixels tall. For an exact ratio, use a width that divides evenly by 4.
Does cropping to 4:3 reduce image quality?
Cropping removes pixels outside the frame but doesn’t change the ones you keep. Quality can drop if you then enlarge the crop beyond its own size, or save as JPG or WebP at a low quality setting.
Will my original photo be changed?
No. The tool reads your photo in the browser and creates a new file when you download. The original file on your device is never modified, so you can always start again.
Is 4:3 the same as 3:4?
They’re the same proportions turned on their side. 4:3 is landscape (wider than tall) and 3:4 is portrait (taller than wide). Use the 3:4 cropper for upright photos.