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GuestImage Tools

Image Resizer

An image sometimes needs 800 pixels wide for the web, sometimes 300 DPI for print, sometimes exactly the Instagram dimensions - and every time you fiddle around in an image editor. The image resizer changes image sizes by pixels, percentage or DPI, with presets, preview and batch processing, right in the browser.

Try it right here

This is not a mockup - try it right here.

What Image Resizer does

Resizing images sounds trivial but in practice it is a constant little nuisance. Sometimes you want a fixed pixel width, sometimes a percentage, sometimes a print resolution in DPI. And heaven forbid you forget the aspect ratio, then the motif gets squashed. The image resizer takes over that arithmetic and shows you the result in a live preview before you download.

You choose how to scale: by pixels when you need an exact width or height, by percentage when you just want smaller, or by DPI when the image is going to print. The aspect ratio stays locked by default so nothing distorts - and can be unlocked when you deliberately want to crop to a fixed dimension.

For the ever-same targets there are presets. Whether profile picture, thumbnail or a social format like Instagram, you pick the template and the right dimensions are set. That saves looking up the pixel counts and makes sure your image is not cropped or shown blurry on the platform.

When your image is going to print, the DPI setting is crucial. For the screen 72 DPI is enough, for good print you want 300 DPI. The tool works out the matching pixel size so your photo stays sharp on paper rather than turning pixelated. No more guessing between screen and print resolution.

With batch processing you scale many images to the same size in one pass. A whole gallery to a uniform web width, a series of product photos to identical dimensions - set it once, all images done. If you like, you can compress the result or output it in another format such as WebP at the same time.

Everything runs right in the browser, no signup. In most cases your images stay on your device. Fast, data-frugal and no watermark - just the right size for the right purpose.

Features

Pixels, percentage or DPI

Scale the way your target needs - exact dimensions, relative size or print resolution.

Aspect ratio locked

The ratio stays intact by default so nothing gets squashed - unlockable when needed.

Ready-made presets

Profile picture, thumbnail, Instagram and more - the right dimensions set in one click.

DPI for print

Works out the pixel size for 300 DPI so your image stays sharp on paper.

Live preview

See the result before you download - no surprise after saving.

Batch processing

Bring many images to a uniform size, optionally compressed or as WebP in the same step.

How it works

  1. 1

    Upload an image

    Drag one or more images into the window. Single or as a whole batch.

  2. 2

    Choose the scaling mode

    Decide between pixels, percentage or DPI - or grab one of the presets directly.

  3. 3

    Enter the dimensions

    Set the target size. The aspect ratio stays locked unless you deliberately unlock it.

  4. 4

    Check preview and download

    Glance at the preview and download the resized image individually or as a series.

Who needs this

→Web developers bringing a gallery to a uniform width.
→Anyone cropping a profile picture or thumbnail to exact platform dimensions.
→Users preparing photos at print resolution for flyers or photo books.
→Shop owners unifying product images to one format.
→Anyone who needs an oversized image at a manageable size fast.

Frequently asked questions

Will my image get distorted when I resize it?

No, as long as the aspect ratio stays locked - that is the default. Only if you deliberately unlock it and set width and height separately can the motif get squashed.

What does DPI mean and when do I need it?

DPI (dots per inch) describes the print resolution. For the screen 72 DPI is enough, for good print you want 300 DPI. If your image is going to print, set 300 DPI so it stays sharp on paper.

Can I also enlarge an image?

Yes, the tool scales both up and down. When enlarging, though, it cannot invent detail that is not in the original, so the image gets softer. For maximum sharpness it is better to scale down.

Can I resize several images at once?

Yes. Batch processing brings a whole collection to the same size. Handy for galleries, product photos or any image series that should be uniform.

Can I change the format while resizing?

Yes. If you like, you output the resized image compressed or in another format such as WebP straight away, so you do not have to run it through a second tool afterwards.

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Ready to use Image Resizer?

No installation. No account needed to start. Open it right in your browser.

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