Resize by width, height, pixels or percentage with lock aspect ratio, fit, fill & padding.
Change image dimensions precisely — by pixels, by percentage, or to a target file size. Lock the aspect ratio or set both sides freely, with fit, fill, stretch and padding modes.
The resizer changes how many pixels an image contains. That is a different operation from compression, which changes how those pixels are encoded — and for most size problems, resizing is the more effective lever, because a photo displayed at 400 pixels wide looks identical whether it came from a 4000-pixel original or a 400-pixel one.
When your target dimensions do not match the source aspect ratio, something has to give. The mode you pick decides what.
| Mode | Behaviour | Use when |
|---|---|---|
| Fit | Scales until the whole image fits inside the box; may leave empty space | You must not lose any content |
| Fill | Scales to cover the box and crops the overflow | You need exact dimensions and can lose edges |
| Stretch | Forces both dimensions; distorts the image | Almost never — it squashes faces |
| Padding | Fits, then pads the gap with a colour | You need exact dimensions and must keep everything |
Enlarging a 400 × 500 image to 1200 × 1500 produces a file with the right pixel count and no additional information. The extra pixels are interpolated from their neighbours — estimated, not recovered. The result is soft.
Downscaling, by contrast, is essentially free and often improves apparent sharpness because averaging reduces noise. The DPI and resolution guide covers the arithmetic if you are working towards a print size.
| Purpose | Dimensions |
|---|---|
| IBPS form photograph | 200 × 230 px |
| IBPS signature | 140 × 60 px |
| Passport photo (35 × 45 mm at 300 DPI) | 413 × 531 px |
| US passport (2 × 2 in at 300 DPI) | 600 × 600 px |
| Instagram square post | 1080 × 1080 px |
| YouTube thumbnail | 1280 × 720 px |
| Document scan for upload | 1800 px on the long edge |
| Website hero image | 2400 px wide |
Yes. Turn off the aspect-ratio lock and enter any values you want. Be aware that if the resulting ratio differs from the source, the image will distort unless you use a fit or padding mode.
Only in Stretch mode. Fit, Fill and Padding all preserve the correct proportions — they differ in whether they leave empty space, crop, or pad.
Yes. Batch resizing applies the same settings to every file and returns them as a ZIP.
Resizing changes the pixel count; compressing changes how those pixels are encoded. Both reduce file size, but resizing costs almost nothing in perceived quality while heavy compression is very visible. Resize first, compress second.
The resizer targets dimensions. For an exact file size, use the Image Compressor, which will reduce resolution automatically if the target demands it.
Downscaling loses detail you were not going to see at the smaller size and generally looks fine or better. Upscaling cannot create detail and looks soft. Both re-encode the file, so start from your original rather than a compressed copy.