Resize images free online
Shrink large photos to the exact dimensions you need — set a max width or height and the aspect ratio is kept automatically. ToolCrix batch-resizes JPG, PNG and WebP in your browser with no upload, so private photos stay on your device.
How to do it
- Add your images above.
- Set a maximum width and/or height in pixels.
- Keep ‘maintain aspect ratio’ on, then download individually or as a ZIP.
Resizing vs compressing: two different levers
Compression re-encodes the same pixels more efficiently; resizing throws pixels away. A 12-megapixel phone photo is around 4000×3000 pixels, but a full-width website image only needs ~1920px and an avatar needs 400 — everything beyond that is data no screen will ever display. That's why resizing is the bigger lever: halving both dimensions cuts the pixel count (and roughly the file size) to a quarter before compression even starts. For the smallest possible files, resize first, then compress.
Dimensions that cover most jobs
Useful targets: 1920px wide for full-width web images and wallpapers, 1200px for blog post images and Open Graph previews, 1080px for Instagram-style square or portrait posts, 800px for inline content images, and 200–400px for avatars and thumbnails. When a form says “photo must be under 1MB” or “max 600×600”, this is the tool that gets you there.
Aspect ratio, stretching and quality
With ‘maintain aspect ratio’ on, the image scales until it fits inside your max width/height box — nothing is stretched or cropped. Turning it off forces exact dimensions and will distort the image unless the ratio already matches. Downscaling uses smooth interpolation and generally improves perceived sharpness at the new size; upscaling (entering dimensions larger than the original) can't invent detail and will look soft, so avoid it. The output keeps your input format — JPG stays JPG, PNG stays PNG — so nothing else about the image changes.
Frequently asked questions
Will resizing distort my photo? Not with the default setting — ToolCrix keeps the aspect ratio and scales the image to fit inside your limits; only unchecking that option forces exact (possibly stretched) dimensions.
What size should I use for the web? ToolCrix's rule of thumb: 1920px wide for full-width images, 1200px for blog and social previews, 800px for inline images — larger than that just slows the page down.
Can I resize a whole folder of photos at once? Yes — drop the batch into ToolCrix, set one max dimension, and download everything as a ZIP; each image is scaled to fit the same box.
Does making an image smaller reduce quality? Downscaling in ToolCrix uses smooth interpolation and typically looks sharper at the new size; it's enlarging beyond the original dimensions that softens an image, so avoid upscaling.
Should I resize or compress to meet an upload limit? Do both, in that order — resize with ToolCrix to the dimensions actually needed (that alone can cut the file to a quarter), then compress the result for the final squeeze.
Need more? Use the full Image Compressor for every option.