Free Image Resizer Online

The Image Resizer is a free online tool that lets you resize images to any dimension while maintaining aspect ratio or setting custom sizes.

Yes, it is completely free with no registration required. All image processing happens client-side in your browser.

No, the Image Resizer processes everything locally in your browser. Your images never leave your device.

The Image Resizer supports JPG, PNG, WebP, GIF, and other common image formats.

Yes, the Image Resizer is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Image Resizer in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

The Image Resizer works in all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. For the best experience, use the latest version of your preferred browser.

Resizing changes an image's dimensions — how many pixels it contains — so a 4000-pixel-wide photo from a phone camera can become a 400-pixel blog thumbnail. Compression keeps the same dimensions but re-encodes the file to shrink its size, usually by discarding fine detail. They solve different problems and work best together: resize an image down to the size it will actually display, then compress the result for the final saving. Serving a picture far larger than its display size wastes bandwidth and slows the page, which hurts Core Web Vitals. This tool handles the resizing step in pixels, by percentage, or by platform preset, and its JPEG and WebP outputs include a quality slider so you can do a light compression pass at the same time. Upload an image to set its new dimensions and preview the result.

When the target shape differs from the original, the fit mode decides how the image fills the box. Stretch forces the picture to fill the exact dimensions, which distorts it if the aspect ratios don't match. Contain scales the image to fit entirely inside the box without cropping, leaving the leftover space transparent or filled — nothing is lost, but you may get padding. Cover scales the image to fill the box completely and trims whatever overflows, which is ideal for making a clean square thumbnail from a rectangular photo without any borders. Use contain when every part of the image matters, and cover when filling the frame matters more than keeping the edges. This tool offers all three modes, so you can pick the behavior that suits your source and target. Upload an image and switch fit modes to see the difference live.

Keep the aspect-ratio lock turned on. With the lock active, typing one dimension automatically updates the other in proportion, so the picture keeps its original shape and never looks squashed or stretched. If you only need to make a photo a percentage smaller or larger, use percentage scaling — setting 50 percent halves both width and height together, which can't distort anything. Distortion happens when width and height are changed by different ratios, so a 16:9 photo forced into a square box will look wrong unless you crop instead. When you do need a different shape, use the cover fit mode to fill the new box and trim the overflow rather than stretching. This tool keeps the lock on by default; switch it off only when you deliberately want a non-proportional size. Upload an image to resize it cleanly.

DPI (dots per inch) is metadata that tells a printer how large to render the image on paper; it does not change the number of pixels in the file. Resizing changes the actual pixel dimensions, which is what determines on-screen sharpness and how large you can print before the image looks soft. For print work, what matters is having enough pixels: a sharp 4×6 photo at 300 DPI needs roughly 1200×1800 pixels. This tool lets you set the pixel dimensions and separately write a DPI value (72, 96, 150, 300, or 600) into the file's metadata, so a print shop reads the right output size. There is also a toggle to preserve the original EXIF data instead of stripping it. Upload an image, set your dimensions and DPI, and download a print-ready file.

Yes. Upload several files together, apply one set of dimensions to the whole batch in a single step, then download everything as one ZIP archive. This is far quicker than resizing pictures one by one and keeps a product catalog, gallery, or thumbnail set perfectly consistent in size. Because all the work runs locally in your browser using the HTML canvas, batch resizing is limited only by your device's memory rather than any upload quota or file-count cap, and your images never leave your computer. You can combine batch resizing with the output options too — choosing PNG, JPEG, or WebP and a quality level that applies across the set. For the smallest files, WebP usually produces the most compact result of the three formats. Upload your images, set the shared dimensions, and grab the ZIP when it's ready.