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Resize images online to the exact dimensions you need. Keep aspect ratio locked by default, use common presets, and download results instantly—processed in your browser.
Changing image dimensions is one of the fastest ways to make photos fit a layout, profile size, or upload limit. This free image resizer works with JPG, PNG, and WebP files in your browser.
No account is required. Your files are not uploaded to IMG Free Toolkit servers for resizing.
1. Upload the image you want to resize.
2. Enter a new width or height, or pick a common size preset.
3. Keep aspect ratio locked unless you intentionally want to stretch the image.
4. Process the image and download the resized result.
Aspect ratio is the relationship between width and height. Locking it prevents stretching or squashing. When you change one side, the other updates automatically.
Unlock aspect ratio only when you need a specific crop box or non-proportional output.
Websites often use widths like 1200px for article heroes, 800px for content images, and smaller sizes for thumbnails. Social platforms each publish their own recommended dimensions.
Resize to the largest size you actually display, then compress if the file is still heavy.
Resizing changes pixel dimensions. Compression changes encoding quality and file size without necessarily changing width and height.
If an image is 4000px wide but shown at 800px, resize first. Then use the Image Compressor to reduce remaining file weight.
Yes. Aspect ratio lock is enabled by default. When you change width or height, the other value updates automatically.
No. Resizing is processed in your browser and files are not uploaded to our servers.
The resizer keeps the original format family: PNG stays PNG, JPEG stays JPEG, and WebP stays WebP.
Match the largest size you display. Many content images work well around 800–1200px wide; thumbnails can be much smaller.