How to Resize an Image Without Losing Quality

Short answer: make an image smaller, not bigger, keep the aspect ratio locked, and save in a sensible format. Shrinking keeps a photo looking sharp at its new size. Enlarging cannot add detail that was never there. You can do the shrinking part with Imgovo’s Image Resizer in your browser, using exact pixels or a percentage.

Why resized images sometimes look bad

A digital photo is a grid of pixels. Resizing means creating a new grid with a different number of pixels, and the software calculates each new pixel from the old ones around it.

• Shrinking combines many original pixels into fewer new ones. There is more information than needed, so the result stays clean.
• Enlarging has to create pixels from less information than the new size needs. The result looks soft or blocky because the detail is estimated, not recorded.

There is also a quality cost in saving. Re-saving a JPG or WebP applies lossy compression again. Imgovo’s tools that change an image save at roughly 92–95% quality, and saving as PNG loses nothing compared with the decoded image. If a picture goes through many rounds of edit and re-save, keep your original and resize from it each time instead of resizing a copy of a copy.

Choose the right size first

Resize to what the picture will actually be used for. Larger is not better if nobody sees the extra pixels.

Use	Reasonable long side
Website or blog image	1200–2000 px
Email attachment	1000–1600 px
Social media post	Follow the platform’s size, see the size cheat sheet
Screen wallpaper	Your screen resolution
Print	Depends on print size and DPI

The web and email ranges above are the guidance given on the Imgovo resizer page. They are starting points, not rules. For print, the pixels you need depend on the physical size, which the DPI & Size Calculator can work out.

Step by step in Imgovo

1. Open the Image Resizer and add your photo. It is processed locally.
2. Pick how you want to set the size:
   • Exact pixels: type a width and height, for example 1920 × 1080.
   • Percentage: use “scale by %”. Entering 50 halves both sides.
   • Preset: choose a platform or standard ratio from the dropdown.
3. Keep Lock aspect ratio switched on. When you type one side, the other is calculated for you.
4. If the new size has a different shape from the original, choose how it should fit. Fit whole image keeps everything and adds margins. Fill frame crops the picture to fill the shape.
5. Choose the output format: JPG, PNG or WebP. JPG suits photos, PNG suits graphics with text or sharp edges, and WebP gives small files for websites. For a comparison, see JPG vs PNG vs WebP vs AVIF.
6. Download the result.

The resizer does not offer a quality slider or a target file size. If you need a particular file size, resize first and then use Compress Image. The steps are in How to compress an image to under 100 KB.

Resize or crop?

These are different jobs. Resizing keeps the whole picture and changes its dimensions. Cropping cuts away part of the picture. If you need a different shape, such as a square from a landscape photo, crop first with Crop Image so that you decide what stays in frame, then resize. Doing it the other way round can leave the subject off-centre.

To crop, adjust, resize and export in one place, the Image Editor combines these steps for a single photo and shows the real file size.

Enlarging: what to expect

Sometimes you have to enlarge, for example to meet a minimum size on a form. Some practical points:

• A modest enlargement is usually acceptable. A big one will look soft.
• The softness is less obvious on small screens and more obvious in print.
• If you can, go back to the original file. It may be larger than the copy you have.
• Do not enlarge a photo that has already been compressed hard. The compression artefacts get bigger too.

Limits to know about

The resizer runs in your browser, so the practical limit is your device’s memory. Very large output sizes cannot be created: roughly 16,000 pixels on a side is the ceiling in the browser. You are unlikely to need more.

Checklist

1. Decide where the image will be used and pick a size to match.
2. Work from the original file.
3. Keep the aspect ratio locked.
4. Crop first if you need a different shape.
5. Save as JPG for photos or PNG for graphics.
6. Check the result at 100% zoom before sending.

Do it now

Open the Image Resizer, enter your size or percentage and download a copy that fits.