Enter the required information
Use the fields in the tool above and keep units and formats consistent.
Resize photos to exact pixel sizes or a target KB for exam forms, Instagram posts and product listings, keeping the ratio so nothing looks stretched.
A form rejects your photo because it is 3 MB. Instagram crops your banner awkwardly. A marketplace wants 1000 pixels on the longest side. Each of these is a resizing problem, but they are not the same problem. This image resizer changes pixel dimensions or scales by percentage. Keep the aspect ratio locked so faces and products hold their shape.
Aspect ratio is simply width compared with height. A 4000 x 3000 photo has a 4:3 ratio. Type 1080 x 1080 with the lock off and the picture gets squashed sideways. With the lock on, you set one side and the other follows. To get a true square, crop first and resize second.
People say "resize" when they mean three different things. Picking the right one saves a lot of trial and error, especially when an upload keeps failing.
Pixel count drives file size more than anything else. Halving both width and height leaves only a quarter of the pixels. So a 4 MB phone photo cut to 50% often lands near 1 MB. The exact figure depends on detail, noise and compression.
Platforms update their specs now and then, so treat these as safe starting points rather than fixed rules.
| Use | Suggested size (pixels) | Ratio |
|---|---|---|
| Instagram square post | 1080 x 1080 | 1:1 |
| Instagram portrait post | 1080 x 1350 | 4:5 |
| YouTube thumbnail | 1280 x 720 | 16:9 |
| LinkedIn profile banner | 1584 x 396 | 4:1 |
| Website hero banner | 1920 x 1080 | 16:9 |
| Marketplace product photo | 1000 to 2000 on the longest side | Usually 1:1 |
Indian portals for exams, passports and scholarships usually set limits on both dimensions and file size. A notice might ask for a photo between 20 KB and 50 KB, or a signature under 20 KB. These numbers vary by portal, so read the official notification first. Resize to the stated pixels, then lower quality gradually until the file fits.
Resizing down throws away pixels, and the result usually stays sharp. Resizing up has to invent pixels that were never captured. Software fills the gaps by blending neighbouring colours, which softens edges and text. A 400 x 400 logo stretched to 1600 x 1600 will look fuzzy on almost any screen.
For a larger version, go back to the original file or ask your designer for a vector logo. Otherwise, the ToolsMate image resizer works best when you start from the highest resolution copy you have. Keep that original untouched and save each resized version under a new name.
Use the fields in the tool above and keep units and formats consistent.
Review the result shown in the output area.
Confirm that the result matches your situation before using it for a decision.
The image is drawn to a target canvas dimension while preserving its aspect ratio.This describes the core logic used by the tool. Check any assumptions that may affect your result.
Use accurate inputs and keep units consistent.
Review the assumptions before using the result for a decision.
Compare important results with an independent or official source.
Reduce the pixel dimensions first, then lower the JPG quality in small steps until the file drops under 50 KB. For a passport-style photo, around 300 x 400 pixels at medium quality often fits. Always check the portal's own dimension rules before uploading.
Making an image smaller rarely hurts visible quality, because the screen shows fewer pixels anyway. Making it larger does, since new pixels are guessed from old ones. Repeated JPG saves can also add blockiness, so resize once from the original wherever possible.
It keeps width and height in the same proportion as the original. Change one value and the other updates automatically. Turning it off lets you type any size, but faces, logos and products will then look stretched or squashed.
Crop the photo to a square first, choosing which area to keep, then resize to 1080 x 1080. If you cannot lose any edges, place the image on a square canvas with padding instead. Resizing a rectangle straight to a square distorts it.
Use pixels when a platform or form names an exact size. Use percentage when you simply want a smaller image and the precise dimensions do not matter. Percentage scaling always keeps the proportions, so there is no risk of stretching anything.
Batch resizing is handy for product catalogues and blog galleries. If the tool offers it, set the longest side rather than a fixed width and height. That way portrait and landscape photos both shrink evenly without being forced into one shape.
Most website images do not need to be wider than the space they fill. Full-width banners often work at 1600 to 1920 pixels wide. Images inside an article sit well at 800 to 1200. Smaller dimensions load faster and help page speed scores.
Explore other useful tools across the site.