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Resize and Reduce Image

Change image size and shrink the file in a single pass — set target dimensions and a KB limit at once. Free, private, and runs entirely in your browser.

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100% Free & no login required. Your images never leave your device.

How It Works

Step-by-step guide to resize image dimensions and reduce file size to a specific KB or MB target in one step

Upload Your Image

Select one or more JPG, PNG, or WebP files from your device. You can upload up to 12 images at once for batch processing — no account or installation needed to get started.

Set Size and Dimensions

Enter the target width and height in pixels, inches, cm, or mm. Optionally add a max file size in KB or MB and pick your output format. All three requirements apply in a single pass — no need to run the image through separate tools.

Preview and Download

Check the live preview to confirm dimensions and visual quality before you save. Download instantly — everything runs locally in your browser, so your images are never sent to any server.

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Why Choose Imresizer?

Fast, secure, and completely free image resizing

  • Resize and Reduce in One Step

    Most tools make you resize first, then compress separately. Here you set the target width, height, KB limit, and output format all at once — one upload, one download, done.

  • 100% Private — Stays on Your Device

    All processing happens in your browser. Your images are never uploaded to a server, which makes this safe for sensitive files like passport photos, ID scans, and medical documents.

  • Exact Dimension Control

    Change image size to precise pixel, inch, cm, or mm values. Use built-in presets for Instagram posts, YouTube thumbnails, passport photos, and more — or enter fully custom dimensions.

  • Bulk Processing Up to 12 Images

    Upload a full batch and resize and reduce all images in one go using the same settings. Useful when preparing a set of documents that all need to meet the same dimension and file size requirements.

  • Free, No Account Needed

    Change image size and compress as many times as you need — no login, no watermarks, no hidden limits. An optional subscription removes ads and unlocks AI-powered extras, but the core tool is always free.

  • JPG, PNG, and WebP Support

    Upload images in any of the three most common formats. You can also convert between formats during processing — switching a large PNG to JPG often cuts the file size significantly without a visible drop in quality.

  • Works on Any Device

    Use it from your phone camera roll or your desktop browser — no app download required. The tool is fully responsive and runs on any modern browser on iOS, Android, Windows, or macOS.

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Resize Image to 100KB

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Testimonials

What Our Users Say

Trusted by thousands of users worldwide since 2015

“
I had to submit a photo that was exactly 600×600px and under 100KB for a government portal. This did both at once — took about 10 seconds.
“
Didn't realize you could set dimensions AND a file size limit in the same tool. Every other site makes you do it in two steps. This just works.
“
I process product photos for my Etsy shop and the batch mode is a lifesaver. Changed image size for 10 photos in one go.
“
The privacy thing actually matters to me. I was resizing ID documents and really didn't want them uploaded anywhere. Browser-only is the right call.
“
Picked the passport preset, added a 50KB limit, and it was done on the first try. No fiddling.
“
Fast and simple. I don't need fancy features — just a reliable way to resize and reduce images for email attachments. This does exactly that.
“
Free tools usually have a catch. This one genuinely doesn't.

Frequently Asked Questions

Everything you need to know about image resizing

What does it mean to resize and reduce an image?

Resizing changes the image's pixel dimensions — its width and height. Reducing shrinks the file size in KB or MB. Many official forms and portals require both: a photo that's exactly 600×600 pixels AND under 100KB, for example. This tool lets you change image size and compress the file in a single step instead of using two separate tools.

How do I resize and reduce an image at the same time?

Upload your image, then enter your target width and height along with a max file size in KB or MB. The tool scales the image to your specified dimensions first, then applies compression to meet the file size limit — all in one pass. You'll see a live preview before downloading so you can check the result.

Why do some forms require both a specific size and a KB limit?

Government portals, application systems, and e-commerce platforms often set strict upload rules to standardize storage and processing. Resizing alone doesn't always bring the file under the KB limit, and compressing alone doesn't fix incorrect dimensions. You need both at once — which is what this tool does.

Will changing the image size reduce the quality?

Scaling down dimensions has minimal visual impact when the reduction is moderate. Compression can reduce quality at very aggressive levels, but the tool preserves as much detail as possible while meeting your KB target. The live preview lets you inspect the result before you commit to downloading.

Can I change image size without compressing the file?

The KB/MB limit field is optional. Leave it blank and the tool only changes the image dimensions without applying any compression. You can also skip the dimensions and only set a file size target if that's all you need — the tool handles any combination.

What image formats can I upload and download?

You can upload JPG, JPEG, PNG, and WebP files. You can also convert between formats during processing — for example, converting a PNG to JPG often reduces the file size significantly, making it much easier to hit a tight KB limit without affecting visible quality.

Is it safe to use this tool for ID photos and sensitive files?

All processing runs entirely in your browser — your images are never sent to any server. Nothing is stored, logged, or transmitted. This makes it safe to use for passport photos, national ID scans, medical images, and any document where privacy is a concern.

Can I resize and reduce multiple images at once?

You can upload up to 12 images and process them all in a single batch using the same settings. This is useful when preparing a full set of documents that need to meet the same output requirements — like multiple passport photos or a batch of e-commerce product images.

What are the most common reasons to resize and reduce an image?

The most frequent use cases are: uploading photos to government or university portals with strict size rules, preparing passport and visa photos, compressing images for job applications, optimizing product photos for e-commerce listings, and reducing images for email attachments where inbox size limits apply.

What size presets does the tool include?

Built-in presets cover common use cases including Instagram posts and stories, YouTube thumbnails, Facebook covers, Twitter/X headers, LinkedIn banners, and international passport photo sizes. Select a preset to auto-fill the width and height, then optionally add your own KB or MB limit on top.

Do I need to create an account or pay to use this?

No account or payment is required. You can resize and reduce images as many times as you need, completely free. An optional subscription is available for an ad-free experience and AI-powered features, but the core resize and compress functionality is always free to use.
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