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Resize Images Free — Exact Pixel Dimensions

Resize to exact pixel dimensions. Works entirely in your browser. Your files never leave your device.

Open Image Resizer Free
No file uploadNo account needed100% privateWorks offlineAlways free
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PNG, JPG, WebP

What is Image Resizer?

Image Resizer is a free browser-based tool that changes the pixel dimensions of JPG, PNG and WebP images to an exact size you specify. Everything runs locally in your browser — no files are uploaded, and results appear instantly without waiting for a server.

Resizing works by resampling the pixel grid to the new dimensions. Reducing size (downscaling) always produces clean results. Enlarging (upscaling) fills in new pixels by interpolation, which can make fine details look softer. For best quality when enlarging, keep the increase under 150% of the original size.

Typical use cases include resizing photos to a maximum width before uploading to a CMS, preparing images at exact dimensions required by social media platforms (Twitter header: 1500×500, Instagram square: 1080×1080), creating thumbnails from full-size originals, and standardizing sizes across a batch of product photos. Enable the aspect ratio lock to scale proportionally without distortion.

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Instant results
No server processing or wait
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100% private
Files stay on your device
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Always free
No subscription or fees
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Mobile ready
Works on any device

How to use Image Resizer

  1. Upload your image (JPG, PNG or WebP) by clicking or dragging it in
  2. Enter the target width or height in pixels — enable lock to keep aspect ratio
  3. Preview the resized dimensions before downloading
  4. Click Download to save your resized image instantly

Why use OnlineToolsPlus?

Image tools on OnlineToolsPlus run entirely in your browser using the Canvas API — no file ever touches a server. This matters for privacy: your photos, screenshots and graphics stay on your device. With 15+ free image tools covering compression, conversion, cropping, OCR, watermarking and more, you can handle any image task without installing software or creating an account.

Frequently asked questions

Does resizing reduce image quality?
Resizing to smaller dimensions does not reduce quality as long as you stay above the display size. Resizing up (enlarging) can make images look soft or pixelated because there is no extra detail to fill the added pixels.
What is the difference between resize and crop?
Resize changes the total dimensions of the image while keeping all the content. Crop cuts away part of the image to focus on a specific area. If you need a specific size without distortion, crop first to get the right ratio, then resize.
Can I resize without losing the aspect ratio?
Yes. Keep the aspect ratio lock enabled and enter only one dimension. The other adjusts automatically so the image is not stretched or squashed.
What formats does the resizer support?
JPG, PNG and WebP. The output format matches the input. If you need a different format, use the Image Converter tool after resizing.
Is there a maximum file size?
No upload limit because everything runs in your browser. Very large files on older devices may be slow, but they will process.
Why does my resized image look blurry?
Blurriness when resizing up is normal. You are asking the tool to invent pixels that do not exist. For enlarging, use an AI upscaling tool which uses machine learning to fill in detail more convincingly.

More Image Tools

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Last updated: April 11, 2026

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