How to resize an image
- Choose or drop your images. Several at once is fine; each is resized with the same settings.
- Pick how to resize:
- Percent scales width and height together — 50% halves both.
- Width sets a new width in pixels; the height follows, so nothing is distorted.
- Width × height targets exact dimensions, with three ways to handle a different shape (below).
- Choose the format — the same as the original, or convert to JPG, PNG or WebP while you're at it.
- Download the results. Each line shows the old and new dimensions and the file size.
Fit, crop or stretch?
When the target shape differs from the photo — a square for a profile picture from a 4:3 photo, for example — there are three honest options:
| Shape | What happens | 4,000 × 3,000 photo into 1,080 × 1,080 |
|---|---|---|
| Fit inside | Keeps proportions; the image fits within the box, so one side ends up smaller | 1,080 × 810 |
| Crop to fill | Keeps proportions and fills the box exactly, trimming the edges evenly from the centre | 1,080 × 1,080 (sides trimmed) |
| Stretch | Forces the exact size and distorts the picture | 1,080 × 1,080 (squashed) |
Fit is the safe default. Crop to fill is what most sites do for avatars and thumbnails. Stretch is only right when the proportions are already almost the same.
Pixels, size and quality
An image's dimensions are its width and height in pixels. File size grows with the number of pixels, which is width × height: a 4,000 × 3,000 photo has 12 million pixels, while 2,000 × 1,500 has 3 million — a quarter. That is why resizing is the most effective way to make a large photo smaller, and why the image compressor also offers a longest-side setting.
Making an image larger than the original works, but it can't invent detail: the browser smooths between existing pixels, so an enlarged photo looks softer. For printing, plan on about 300 pixels per inch — an A4 page (210 × 297 mm) at 300 ppi needs about 2,480 × 3,508 pixels.
Common sizes
| Use | Typical size |
|---|---|
| Full HD screen or wallpaper | 1,920 × 1,080 px |
| Square social media post | 1,080 × 1,080 px |
| Website hero image | 1,600–2,000 px wide |
| Blog or article image | 800–1,200 px wide |
| Profile picture | 400 × 400 px or larger |
Platforms change their recommendations from time to time, so check the current guidance when a site asks for something specific.
Private by design
The resizing is done by your own browser — your photos are never uploaded, and the resized copies carry no hidden metadata such as the GPS location from your phone camera. To turn the resized pictures into a single document, use JPG to PDF; to only change the format, use the image converter.
Frequently asked questions
How do I resize an image without distorting it?
Use Percent or Width, or choose Width × height with "Fit inside" or "Crop to fill". All three keep the proportions; only "Stretch" can distort the picture.
How do I make a square image from a rectangular photo?
Choose Width × height, enter the same number for both (for example 1080 × 1080) and pick "Crop to fill". The edges are trimmed evenly from the centre.
Does resizing reduce the file size?
Yes, usually a lot: file size follows the number of pixels, so halving the width and height leaves about a quarter of the data.
Are my photos uploaded?
No. Your browser resizes the images on your device and nothing is sent to a server.
Can I make an image bigger?
Yes, up to 1,000%, but enlarging can’t add real detail — the result looks softer than the original.
Last updated: October 14, 2026