Resize images to an exact width and height, with the aspect ratio kept for you. Fast, free, and built for simple browser-based workflows.
No image selected yet. Your image is processed in your browser and never uploaded.
Choose an image, set a size, then click Resize Image.
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Image Resizer is a free online tool that changes an image's pixel dimensions to an exact width and height. Choose a file, type the size you need, and the new version is rendered in your browser ready to download -- no account, no upload, and no software to install.
It earns its keep when a file is the wrong size for where it is going: a 4000-pixel phone photo that needs to be 1200 pixels wide for a blog post, a headshot a form insists must be 300 by 300, product shots that all have to match each other, or a screenshot too heavy to email. Set the width, leave Keep original aspect ratio ticked, and the height follows on its own. For the common case of preparing an image for social media, the Preset Size dropdown fills in the exact pixel size Instagram, Facebook, LinkedIn, X or YouTube expect, so there is nothing to look up first.
Your image never leaves the device. The resizing happens on a canvas inside your browser, so nothing is uploaded to this site or anywhere else. That matters for client photos, ID scans, unreleased product shots, or screenshots with account details in them -- files you would rather not hand to a server you do not control.
Click Choose Image and pick a PNG, JPEG, WebP, GIF or BMP file. Its real dimensions and file size appear underneath, and the Width and Height boxes fill in automatically.
Pick a ready-made Preset Size (Instagram, Facebook, X, LinkedIn, YouTube) or type the pixel Width or Height yourself. With Keep original aspect ratio ticked, typing one box updates the other so the picture is never stretched.
Choose PNG, JPEG or WebP under Output Format. For JPEG and WebP, drag the Quality slider -- lower values trade a little detail for a smaller file.
Click Resize Image to render the result, check the original-versus-resized line below the preview, then click Download. Clear resets everything for the next image.
Yes! All our tools are 100% free to use with no hidden costs, no registration required, and no credit card needed.
Absolutely. All tools run entirely in your browser (client-side). Your data never leaves your device and is not sent to our servers.
Yes, once the page is loaded, the tool will continue to work even if you lose internet connection since it runs in your browser.
Yes! All our tools are free for both personal and commercial use.
Usually yes. Fewer pixels means less data, so a 4000-pixel photo scaled down to 1200 pixels often drops from several megabytes to a few hundred kilobytes. Saving as JPEG or WebP and lowering the Quality slider shrinks it further. If you need to keep the dimensions and only cut the file size, use the Image Compressor instead.
Making an image smaller stays sharp, because the tool uses high-quality smoothing when it scales down. Enlarging is the risk: a 500-pixel image stretched to 2000 pixels has no extra detail to draw on, so it will look soft. Start from the largest original you have whenever that is an option.
Yes. Untick Keep original aspect ratio and the Width and Height boxes become independent, so you can force a size such as 1200 by 630 for a social preview. The picture will be squashed or stretched to fit. To change the shape without distorting anything, crop the image instead.
PNG, JPEG, WebP, GIF and BMP -- anything your browser can decode. The result is saved as PNG, JPEG or WebP, whichever you choose under Output Format, so the tool doubles as a format converter. HEIC files from iPhones are not supported by most browsers and will be refused with a message.
There is no upload limit, because nothing is uploaded. Your device memory sets the practical ceiling, and each side can be set up to 10000 pixels. Very large images take a moment to render, and if the browser cannot encode the result the tool says so rather than failing silently.
No. The image is redrawn onto a blank canvas, which copies the pixels but not the metadata, so camera model, GPS location and orientation tags are all dropped. That is usually a privacy win when you are sharing a photo publicly, but check the preview looks the right way up before you download it.
Yes. The Preset Size dropdown fills in Width and Height for Instagram posts and stories, Facebook posts and covers, an X (Twitter) post, a LinkedIn cover, and a YouTube thumbnail. Pick one, or ignore it and type your own exact size -- editing either box afterward switches the dropdown back to Custom size.
Not on this page -- Image Resizer handles one image per resize. To resize many images at once to fit a max size, keeping each one's own aspect ratio, with per-file and ZIP downloads, use Bulk Image Resizer instead.