How to crop an image on this page
- Read the limit note above the square first. About 80 MB. Desktop Chrome or Firefox. iPhone and large files may fail.
- Drop one JPEG, PNG, WebP, or HEIC on the square, click it, or paste from the clipboard with Ctrl/Cmd+V. Nothing leaves the tab.
- Drag the gold rectangle to move the crop. Pull a corner or edge handle to resize. Or type X, Y, W, H in source pixels.
- Pick Free, 1:1, 4:3, 16:9, or 9:16. Tick Lock aspect to keep the current ratio while you resize.
- Pick JPEG or PNG. For JPEG, quality 0.90 is the default.
- Click Crop, then download. There is no watermark and no signup.
Need a different format without cutting the pixels? Use Convert image. Need a quarter turn or a max edge first? Use Rotate / resize. Same drop, still local.
What this page actually does
The browser decodes the still in this tab. HEIC goes through a maintained libheif build (the heic-to library). JPEG, PNG, and WebP use the browser decoder. We draw only the rectangle you picked onto a canvas, then encode a new JPEG or PNG. Close the tab and the bytes are gone.
This is a new file of the pixels. Metadata is not copied. A transparent PNG keeps alpha. JPEG fills empty pixels with white.
Aspect presets and lock
Free is any rectangle. 1:1 is a square. 4:3, 16:9, and 9:16 snap the box to that ratio, centered on where you already were, then keep it while you drag a handle. Lock aspect does the same for whatever ratio the box has now — useful after you sized it by hand. Untick lock (or pick Free) to stretch freely again. X and Y are the top-left in source pixels; W and H are the size. A locked aspect updates the other side when you type.
Why the limits are loud
A browser is not Photos.app. Keep the drop under about 80 MB. Use a desktop. An iPhone tab has a tight memory ceiling. A 48 MP HEIC can decode into hundreds of megabytes of raw RGBA before we draw anything. If the tab reloads or the page goes white, the browser gave up. That is not a silent upload.
Output is capped at an 8192-pixel edge and about 25 megapixels so a crop of a huge still does not take the machine with it. The readout says when we cap. That is a safety ceiling, not a print shop.
What you should expect
JPEG is lossy. A crop is a re-encode, so a second pass is a little softer. Quality 0.90 is visually close to a phone snapshot. PNG is lossless and often larger. HEIC in becomes JPEG or PNG out — we do not write HEIC.
Orientation baked in by the decoder should already look upright for most iPhone stills. If a shot is still sideways, rotate it on /rotate-image first, then come back. Live Photos: we read the still.
What this is not
This is not a batch folder app, not a rotate tool, and not ImageMagick. One still at a time. Hundreds belong in Preview or magick on a machine you control. Convert format without cutting the pixels on /convert-image. Quarter turns and resize on /rotate-image. PDFs have their own clinic at /pdf.
FAQ
Does the photo leave my computer?
No. Decode, crop, and encode run in this tab. The privacy page says the same thing.
Can I paste a screenshot?
Yes. Focus this tab and press Ctrl+V (Cmd+V on a Mac). We take the first image on the clipboard. HEIC rarely lands there; drop those.
Can I crop several files at once?
No. One still. Convert image is the batch verb, and it does not crop.
Does lock stay on when I pick a preset?
Yes. 1:1, 4:3, 16:9, and 9:16 turn lock on. Free leaves lock alone unless you untick it. Unticking lock returns you to Free.
Do you add a watermark or ask for an email?
No. The download link is a normal file.
Is my job counted?
Each successful apply increments a number in localStorage, key once:jobs. Nothing is posted to a server.