Result will appear here.
Resize an image online by pixels, percentage, or a max dimension — aspect ratio locked, formats your choice, entirely in your browser.
Resize Image Online 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 online 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.
Resize Image Online changes the pixel dimensions of an image online 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 online is never enlarged past its original size, and check the result panel for the original and final dimensions and the new file size.
Resize Image Online 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 online 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 online is processed in your browser with the HTML canvas and is never uploaded to a server.
Resize an image online to the exact pixels or maximum dimension a site or form allows.
Scale a big camera or phone image online down by percentage without enlarging it.
Set a max width so an image online loads quickly while keeping its proportions.
Resize an image online from a phone, tablet, or laptop browser with the file staying on the device.
No. Resize Image Online runs entirely in your browser using the HTML canvas. Your image online is resized on your own device and is never sent to imgtoolsbase or any server.
Yes — by default Resize Image Online 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.
Resize Image Online 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. Resize Image Online 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 Resize Image Online 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 Resize Image Online.