Image Resizer — Free
Resize by pixels, percentage, centimetres or inches — or skip straight to a file size like 20KB, 100KB, 200KB or 1MB. In your browser, nothing uploaded, no watermark.
Drop images here
or choose them from your device. JPG, PNG and WebP — one or many at once.
Your images never leave this device. Resizing happens in your browser.
"Resize" covers two different requests, so this tool has two modes instead of forcing one onto the other. Dimensions mode is for when you know the shape you need — 1080 pixels wide for a web banner, 50% for a quick thumbnail, or 10cm at 300 DPI for something going to print. File size mode is for when the number that matters is bytes, not pixels — an upload form capped at 100KB does not care what the image measures, only what it weighs.
Centimetres and inches only mean something with a resolution attached, so choosing one of those units also shows a DPI selector. 300 DPI is the standard for anything that will be printed; 96 DPI matches how most screens actually render an image sized in physical units.
Nothing is uploaded. Every image is resized and re-encoded entirely inside your browser — the file never leaves your device. Once the page has loaded it works with the network off.
How to resize an image
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1. Add your images
Drag them onto the drop zone or choose from your device. Resize one image or a whole batch at once — nothing is uploaded.
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2. Choose Dimensions or File size
Dimensions mode resizes by pixels, percentage, centimetres or inches. File size mode targets an exact byte size like 100KB or 1MB instead.
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3. Set the size
In Dimensions mode, type a width or height and the other side follows automatically if aspect ratio is locked. In File size mode, pick a preset or type your own number.
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4. Resize and download
Press Resize. Each image shows its new dimensions and file size. Download one at a time or the whole batch as a ZIP.
Dimensions or file size?
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Pixels
Exact width and height. The right unit for websites, app assets, and anywhere a design spec gives you a pixel count.
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Percentage
Scale relative to the original — 50% for a quick thumbnail, 200% to enlarge. Useful when you do not need an exact final size, just smaller or bigger.
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Centimetres / inches
Print measurements at a chosen DPI. 300 DPI for anything going to a printer; 96 DPI for something sized in physical units but viewed on screen.
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File size (KB / MB)
Skip dimensions entirely and target bytes directly — 20KB, 100KB, 1MB. The tool finds the quality and size that fit.
Frequently asked questions
How do I resize an image for free? +
Drop the image above, choose Dimensions or File size mode, set the values you want, and press Resize. There is no account, no batch limit and no watermark — the file is never uploaded, and resizing happens entirely in your browser.
Can I resize an image in centimetres or inches? +
Yes. Switch the unit to Centimetres or Inches and pick a resolution (72, 96, 150 or 300 DPI). Print measurements only mean something once a resolution is attached — "10cm wide" is a different pixel count at 96 DPI than it is at 300 DPI — so the DPI choice is shown alongside the size. 300 DPI is the standard for print; 96 DPI matches most screens.
How do I resize an image to 100KB, 200KB or another exact size? +
Switch to File size mode, choose the preset closest to what you need — 20KB, 50KB, 100KB, 200KB, 500KB or 1MB — or type your own number in KB or MB. The tool searches for the quality and, if necessary, the pixel dimensions that land at or just under that size. This is the setting most upload forms and application portals specify directly.
What does "Lock aspect ratio" do? +
It keeps the image proportional: type a width and the height is calculated to match the original ratio automatically, so the image is never stretched or squashed. Turn it off if you need an exact width and height regardless of the original shape.
Does resizing to a smaller pixel size lose quality? +
Shrinking an image loses detail the same way any downscale does — there is simply less information to fit into fewer pixels. This tool uses a multi-step downscale for large size reductions, which produces a sharper result than a single resize pass at very small target sizes. Making an image larger than its original resolution does not add real detail; it only stretches existing pixels.
Can I resize a batch of images at once? +
Yes. Add as many images as you like and they queue together, all resized to the same setting. Download them individually or as a single ZIP.
Can I resize to JPG specifically? +
Yes — JPG is one of the three output formats, alongside PNG and WebP. Choosing JPG also gives you a quality slider in Dimensions mode, since JPG is a lossy format and trades some sharpness for a smaller file.
Are my images uploaded anywhere? +
No. Every image is read, resized and re-encoded entirely inside your browser. Nothing is transmitted. That makes it safe for anything you would not upload to an unknown server — ID photos, private scans, screenshots with personal information.
Is there a limit on file size or the number of images? +
No fixed limit. Images are processed one at a time, so a large batch takes longer rather than failing outright. The practical ceiling is your device's memory on very large source photos.
Will there be a watermark on the resized images? +
No. The output is your image at the new size, nothing added. There is no watermark, no badge, and no paid tier that removes one.
Other free tools
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Image Compressor
The same target-size search, framed around shrinking file size rather than changing dimensions.
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PDF to JPG
Turn PDF pages into images first, then resize them here to whatever size you need.
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PNG to PDF Converter
Combine resized images into a single PDF, with page size and margins under your control.
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PDF Cropper
Drag to remove margins or unwanted edges from a PDF, one page or every page.