Resize Image Online Free
Change the pixel dimensions of an image with the aspect ratio locked or free.
Resizing happens locally in your browser — the image is never sent to a server.
How to use this tool
- 1Select the image you want to resize.
- 2Enter a new width; the height follows automatically while the ratio lock is on.
- 3Turn the lock off if you need exact dimensions and do not mind stretching.
- 4Resize and download the new file.
About this tool
Resizing is the most direct way to make an image fit where it needs to go. Pixel dimensions decide whether a picture fills a header cleanly, sits inside a document without pushing the layout around, or passes an upload field that refuses anything wider than a set number of pixels. Because file weight scales with area rather than with width alone, moving an image from 4000 pixels wide to 1000 removes about ninety four percent of its pixels, which is why resizing before compressing usually produces a far smaller file than compressing alone. Keeping the aspect ratio locked prevents the stretched, subtly wrong look that comes from typing both numbers independently. Common uses include preparing a profile photo at the exact size a site asks for, cutting a camera image down to a sensible web width, matching thumbnails across a gallery so they line up, and shrinking screenshots before dropping them into documentation. This resizer draws your image onto a canvas at the target dimensions inside your browser, so the file is never sent anywhere, and there is no signup, watermark or usage limit.
Frequently Asked Questions
Does resizing happen on your servers?
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No. The image is redrawn locally in your browser and downloaded straight from your device, so it is never transmitted.
Can I enlarge a small image?
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You can enter larger dimensions, but no tool can recover detail that was never captured. Enlarging past the original size gives a softer picture, so upscale modestly.
What does the aspect ratio lock do?
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With the lock on, changing the width updates the height by the same proportion so the image keeps its shape. Turn it off only when you need exact dimensions and accept some distortion.
What size should a web image be?
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For most page content, somewhere between 1200 and 1600 pixels on the longest side is plenty on modern screens. Thumbnails and avatars usually need far less.