How do I make an image file smaller without losing too much quality?

Two levers shrink an image: dimensions and quality. First, cap the longest side to what you actually need; a photo displayed at 1200px wide does not need to be 6000px. Second, re-encode at around 80%% quality, where most people cannot tell the difference from the original but the file is often half the size. Converting to WebP usually saves the most. This tool does all three locally: it resizes on a canvas, re-encodes at your chosen quality, and shows the before and after sizes so you can confirm the savings.

How do I crop an image to a square, or to a 16:9 aspect ratio?

Pick the ratio you need from the crop menu (1:1 square, 4:3, 3:2, 16:9, 21:9, 1.91:1, 4:5, 3:4, 2:3, 9:16, or a custom ratio you type in). A preview appears showing the exact crop box over your image; drag it to choose which part of the photo is kept and zoom in to crop tighter. The readout tells you the exact output size in pixels before you export, so you can match a requirement such as a square logo between 400 and 800 pixels.

A site wants a square logo between 400 and 800 pixels. How do I make one?

Drop the logo in, set the crop to 1:1 square, and set the output size to a value inside the range, for example 600 px. The preview shows the exact output dimensions before you export. If your source is smaller than that, the size rule decides what happens: At most leaves it at its natural size, Exactly enlarges it to 600 px and tells you how much softer that will look. Then compress and download.

home / tools / image compressor

Image Compressor, Cropper & Resizer.

Drop images in, crop to the aspect ratio a site is asking for, set the output size and quality, and get smaller files back with the before/after size for each. The preview shows exactly what you'll get, down to the pixel, before you download.

↓

Drop images here or click to browse

JPG, PNG, WebP, GIF, BMP · multiple files OK

// crop to aspect ratio

// output size (long side)

// output format // size rule

// quality (80%)

// hitting a size requirement (e.g. “square, 400–800px”)

Sites that ask for a logo or banner usually specify two things: an aspect ratio and a pixel range. To hit both:

Set crop to aspect ratio to the shape they want — 1:1 for a square logo, 16:9 for a video thumbnail, 4:5 or 9:16 for social, 1.91:1 for a link preview. Anything unusual goes in Custom ratio.
Set the output size to a number inside their range — for “between 400 and 800px”, pick 600 px and you have headroom on both sides.
Choose a size rule. At most treats the number as a ceiling: a source that is already smaller stays as it is, which is usually what you want. Exactly treats it as a spec and enlarges a small source to hit it — valid, but softer, and the preview tells you by how much.
Drag the preview to choose what stays in frame, and zoom in to crop tighter. The readout above the preview and the size on each row are the exact pixels you'll get.
Cropped several images the same way? Apply to all images copies the current position and zoom to the rest of the batch.

Crop always happens before resize, so the numbers in the preview are the numbers in the downloaded file.

// how to shrink images well

Two levers control file size: dimensions and quality. Pull both only as far as you actually need.

Cap the dimensions. An image shown at 1200px wide doesn't need to be 6000px. Resizing is the single biggest saving. With no crop selected the aspect ratio is preserved and images smaller than the cap are left untouched.
Quality ~80% is the sweet spot for JPG and WebP, usually indistinguishable from the original at roughly half the size. PNG is lossless, so the quality slider doesn't apply to it.
WebP typically produces the smallest files of the three.

Privacy: each image is decoded onto a hidden canvas, resized, and re-encoded entirely in your browser. Nothing is uploaded. As a side effect, canvas re-encoding also drops EXIF metadata.

Related: cropping is destructive — the pixels outside the box are gone from the output. Your original file on disk is never modified, so you can always drop it in again and re-crop.

Related: just changing format without shrinking? Use the Image Converter. Want to inspect or remove photo metadata specifically? The EXIF Viewer & Stripper shows what's hidden in the file first.

// a free, browser-only tool by Tiempo Software, built in Omaha, Nebraska. Runs entirely in your browser; nothing you enter is uploaded. see all tools.