Result will appear here.
Resize an image by pixels, percentage, or a max dimension — aspect ratio locked, formats your choice, entirely in your browser.
Image Resizer supports exact width/height, max width, max height, percentage, and longest/shortest side. Max and percentage modes keep the aspect ratio automatically.
With the lock on, editing either dimension recalculates the other so the image is never distorted. Turn it off for independent width and height.
Keep the input format or convert to JPG, PNG, or WebP. Quality applies to JPG and WebP only; PNG ignores it. JPG fills transparency with the background color.
After processing, the panel shows the original dimensions, the final dimensions, the output format, and the new file size. Re-encoding removes EXIF metadata.
Image Resizer changes the pixel dimensions of an image right in your browser. Pick exact width and height, a maximum width or height, a percentage, or a longest/shortest side, and the tool keeps the aspect ratio unless you turn the lock off.
Output can stay the same format as the input or convert to JPG, PNG, or WebP. The quality slider applies to JPG and WebP; PNG export ignores it in most browsers. When you choose JPG, any transparency is filled with the background color you pick, because JPG cannot store transparency.
Turn on “do not upscale” to make sure a small image is never enlarged past its original size, and check the result panel for the original and final dimensions and the new file size.
Image Resizer offers exact, max width, max height, percentage, and longest/shortest-side modes instead of a single fixed box.
Editing the width updates the height and editing the height updates the width, so the image never distorts.
Keep the original format or convert to JPG, PNG, or WebP, with an honest note that PNG ignores the quality slider.
Your image is processed in your browser with the HTML canvas and is never uploaded to a server.
Resize an image to the exact pixels or maximum dimension a site or form allows.
Scale a big camera or phone image down by percentage without enlarging it.
Set a max width so an image loads quickly while keeping its proportions.
Resize an image from a phone, tablet, or laptop browser with the file staying on the device.
No. Image Resizer runs entirely in your browser using the HTML canvas. Your image is resized on your own device and is never sent to imgtoolsbase or any server.
Yes — by default Image Resizer uses a two-way aspect lock: editing the width updates the height and editing the height updates the width. Turn the lock off to set width and height independently, which can stretch the result.
Image Resizer can keep the same format as the input or convert to JPG, PNG, or WebP. The quality slider applies to JPG and WebP; PNG export ignores quality in most browsers.
Only if you ask it to. Image Resizer enlarges past the original size only when you allow it, and because that softens the image you can turn on “do not upscale” to cap the result at the original size.
JPG cannot store transparency, so Image Resizer fills transparent areas with the background color you choose. Use PNG or WebP if you need to keep a transparent background.
Tools that pair well with Image Resizer.