Pick a shape
Every place a picture goes has its own shape: square for profile pictures and catalogue thumbnails, 4:5 for Instagram portrait posts, 9:16 for stories and reels, 16:9 for YouTube thumbnails and slides, 3:2 for prints. Choose the ratio and press Crop: the tool keeps the largest centred part of the picture with that shape and trims the edges.
Nothing is resized: the cropped picture keeps the original's full resolution and format, transparency included for PNG and WebP. To also make it smaller, run Resize image afterwards. You can crop up to five pictures at once.
| Ratio | Typical use |
|---|---|
| 1:1 | Profile pictures, product thumbnails |
| 4:5 | Instagram portrait posts |
| 9:16 | Stories, reels, phone wallpapers |
| 16:9 | YouTube thumbnails, slides, banners |
| 3:2 | Standard photo prints (10 × 15 cm) |
Private
The crop is made by your browser; your photos are never uploaded.
How this works
For the chosen ratio, the tool computes the largest rectangle with that shape that fits inside the picture and centres it. In a Web Worker your browser decodes the picture, with phone orientation applied, copies exactly that rectangle pixel for pixel and saves it in the original format (JPEG and WebP at quality 92).
Frequently asked
Which part of the picture is kept?
The centre. The largest area with the chosen shape is kept and equal amounts are trimmed from both sides.
Does cropping reduce quality?
The kept area keeps its full resolution. JPG and WebP are saved again at high quality (92).
Are my photos uploaded?
No. They are cropped by your browser on this device.
Can I choose the area myself?
Not yet: the crop is centred. A manual selection will come with the image editor.
Sources
- HTML Standard — OffscreenCanvas convertToBlob()
- W3C — Portable Network Graphics (PNG) Specification (Third Edition)
- ITU-T T.81 — Digital compression and coding of continuous-tone still images (JPEG)
Reviewed Oct 19, 2026 · test vectors fixtures/tools/image/crop-image/