How to use the Image Resizer tool
- Add your imagesDrop one or more images onto the box or click to choose them from your device.
- Choose how to resizeEnter a width and height in pixels, pick a percentage, or select a social media preset.
- Pick the output formatKeep the original format or save as JPG, PNG or WebP, and set the quality.
- Resize and downloadClick “Resize images”, check the preview, then download each image or all of them at once.
Resize images the easy way
- Keep proportionsWith the lock on, the height follows the width automatically so your photos never look stretched.
- Social presetsOne click for Instagram posts and stories, YouTube thumbnails, Facebook and LinkedIn link images, X posts and headers.
- Crop or fitCrop to fill a preset exactly, or fit the whole image inside it with a padding color of your choice.
- High-quality scalingLarge reductions are done in steps, which keeps edges and text sharper than a single resize.
- Batch resizingResize a whole set of photos to the same dimensions and download them as a ZIP file.
- Private by defaultEverything runs in your browser. Your images are never uploaded to a server.
When do you need to resize an image?
Every platform has its own preferred image size. Upload a photo that is too small and it looks blurry. Upload one that is too large and it may be cropped awkwardly, rejected, or slow to load. Resizing to the right dimensions before uploading gives you control over exactly how your picture appears.
Common reasons to resize include meeting the photo requirements of an online application, preparing product images for an online store, making images fit a blog layout, creating social media posts and reducing the size of images before emailing them.
Pixels, percentage or preset?
- By pixels is best when you know the exact dimensions you need, for example a 600 × 600 px product photo or a 1920 px wide website banner.
- By percentage is quickest when you simply want the image smaller (or larger) overall. 50% halves both width and height, which reduces the number of pixels to a quarter.
- Presets match the recommended sizes for major social networks, so you don’t have to look them up.
Recommended social media image sizes
| Use | Size (pixels) | Aspect ratio |
|---|---|---|
| Instagram square post | 1080 × 1080 | 1:1 |
| Instagram portrait post | 1080 × 1350 | 4:5 |
| Instagram / TikTok story, Reels cover | 1080 × 1920 | 9:16 |
| YouTube thumbnail | 1280 × 720 | 16:9 |
| Facebook / LinkedIn shared link | 1200 × 630 | 1.91:1 |
| X (Twitter) header | 1500 × 500 | 3:1 |
Platforms change their recommendations from time to time, but these sizes are widely used and display well across devices.
Does resizing reduce quality?
Making an image smaller keeps it looking sharp, because you are simply discarding pixels the screen did not need. Making an image larger than its original size cannot add real detail: the tool has to invent the extra pixels, so the result looks softer. For the best quality, always start from the largest original you have and resize down.
Resizing and compressing are different. Resizing changes the dimensions in pixels, while compressing reduces the file size at the same dimensions. To make a file as small as possible, resize first and then use our Image Compressor.