Resize Image Without Losing Quality Online Free — Crop, Fit or Stretch

The quick answer

Make it smaller, not bigger. Shrinking keeps a picture sharp. Enlarging makes it soft, because no new detail appears.
Keep the shape. Use Cover (crop) or Contain (fit) in the Image Resizer. Use Stretch only if the new size has the same proportions as the old one.
Start from your biggest original and resize once. Do not resize a copy of a copy.
Nothing is uploaded and there is no account. Up to 20 pictures at a time.

You resize a picture and it comes out looking like it was left out in the rain: soft, fuzzy, a bit stretched. That is rarely the tool's fault. It comes from three habits, and once you know them you can avoid all three. The free GetPlugzz Image Resizer does the resizing in your browser, so nothing is uploaded, nothing is installed and there is no sign-up. This post is about doing it without hurting the picture.

Three reasons a resized picture turns blurry

You made it bigger. A picture is a grid of tiny dots called pixels. Make it bigger and the browser has to invent the extra dots by guessing from their neighbours. The guess is smooth but has no new detail, so the picture looks soft. Think of zooming into a printed photo with a magnifying glass: you see the same dots, just larger.
You squeezed it into a different shape. Forcing a wide picture into a square without cropping makes everything look squashed. Faces get wider or thinner. That is distortion, and it is easy to avoid.
You saved it as a JPG again and again. JPG saves space by trimming a little detail every time you save it. One round is invisible. Five rounds are like a photocopy of a photocopy of a photocopy.

Crop, Fit or Stretch: which one keeps the picture looking right?

When the new size has a different shape than your picture, the tool has to decide what to do with the difference. You choose it in the Fit mode menu.

Cover (crop) fills the whole size and trims whatever sticks out. Nothing is squashed, but the edges are cut off. It is the best choice for a pin, a thumbnail or a cover picture, where the middle matters most.
Contain (fit) keeps the whole picture and fills the empty space with a colour you choose. Nothing is cut and nothing is squashed. Good for a product photo or a logo that must stay complete.
Stretch pulls the picture to match the size exactly. Nothing is cut, but everything gets squashed or stretched. Use it only when the new size has the same proportions as the old one, because then there is nothing to distort.

There is a longer walk-through of the three modes in our guide to resizing images online, and a guide to exact sizes for each platform in how to crop a picture to fit Instagram, Pinterest and more.

How to resize without losing quality, step by step

Open the Image Resizer and add your biggest original. Not a screenshot of it, and not a copy that was already shrunk.
Pick a size no bigger than your picture. Tap a preset (Pinterest, YouTube thumbnail, blog cover and more), or type your own width and height in pixels.
Choose the Fit mode. Cover to crop the edges, Contain to keep everything, or Stretch only if the shapes match.
Choose the format. JPEG for photos (saved at 95% quality), PNG for screenshots, logos and sharp text, WebP for the smallest files.
Press Resize. The files are saved to your computer. If you resized several, they arrive together in one ZIP.

How big should it be?

A common mistake is shrinking a picture far more than you need to. Choose the largest size the place really uses. A few sizes that are built in or easy to type:

1200 × 630 for a blog cover and the preview shown when a link is shared.
1000 × 1500 for a Pinterest pin, 1080 × 1080 for a square Instagram post, 1280 × 720 for a YouTube thumbnail.
Phones and sharp screens show a picture with twice as many dots in the same space, so if a spot on your page is 600 wide, a 1200 wide picture will look crisper there.

If your original is smaller than the size you need, the honest answer is that no tool can add detail that is not in it. Find a bigger original if you can.

Making something with your pictures?

Creative Fabrica is a marketplace of fonts, graphics and other design assets (they say 12 million+). Handy when a picture needs a headline font, a frame or a background. Check the licence of each item before you use it commercially.

Browse Creative Fabrica

This is a paid link. If you buy through it, we may earn a commission at no extra cost to you. Full disclosure →

Which format keeps it sharpest?

PNG never trims anything, so text, logos and screenshots stay razor sharp. The files are bigger.
JPEG is best for photos: small files that open everywhere. Each save trims a little, so resize once from the original.
WebP makes the smallest files and every modern browser opens it.

Only need to change the file type and keep the size? Use the Image Converter instead. And remember that resizing is not the same as compressing: resizing changes how many pixels there are, compressing shrinks the file without changing them.

Good to know before you start

Up to 20 pictures at a time; files come out as getplugzz_date_001, 002 and so on, in the order of your list.
Making a picture larger does not add detail; it just looks softer.
PNG and WebP keep transparency (except in Contain mode with a background colour). JPEG has no transparency, so see-through areas get a solid colour.
HEIC photos are not supported by most browsers. Convert them to JPG first with the Image Converter.
The picture is redrawn, so hidden data such as location is not kept.

FAQ

Making a picture smaller keeps it sharp. Making it bigger is different: the extra pixels have to be invented, so it looks soft. Starting from your biggest original and resizing once keeps the quality as high as it can be.

Not really. No resizer can add detail that is not in the picture. A small picture stretched very large will look soft. If you can, find a bigger original.

Choose Cover (crop) or Contain (fit) in the Fit mode menu. Both keep the shape of the picture. Use Stretch only when the new size has the same proportions as the old one.

It is free, with no account, no watermark and no daily limit. The resizing happens inside your browser, so your pictures never leave your computer.

File size depends on the pixels and the format. PNG files are bigger than JPEG or WebP. If you need a lighter file, choose JPEG or WebP.

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Free Image Resizer — No Upload, No Sign-Up

Presets for social media, blogs and stores, or your own size. Built by GetPlugzz, processed entirely in your browser.

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