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Image Resizer & Compressor

Resize, convert and compress images to a target size (e.g. under 100 KB) — JPG/PNG/WebP, right in your browser, nothing uploaded.

Choose an image to resize, compress or convert. Everything happens in your browser — nothing is uploaded.

Why you’ll love Image Resizer & Compressor

Instant & freeNo signup, no paywall, no limits — Image Resizer & Compressor works the moment the page loads.
Completely privateEverything runs in your browser. Nothing you enter is ever uploaded or stored on a server.
Works on any deviceFully responsive and touch-friendly — use it on your phone, tablet or desktop.
Never uploadedYour files are processed entirely in your browser — they never touch a server.

How to use it

  1. 01

    Open it

    No download and no login — the tool is ready right at the top of this page.

  2. 02

    Use it

    Enter your details or start interacting. Everything updates live as you go.

  3. 03

    Get your result

    Copy, download or share your result in a single tap. That’s it.

About Image Resizer & Compressor

This image resizer and compressor handles the three jobs people actually need in one place: resize a picture to exact pixel dimensions (with an aspect-ratio lock so it never stretches), compress it with a live quality slider, and convert between JPG, PNG and WebP. A live preview shows the result with its estimated file size and dimensions before you download anything.

The standout feature is the target-size mode. If a form says "photo must be under 100 KB", type 100 into the target field and hit Fit to size — the tool runs a quick binary search over quality levels and settles on the highest quality that still fits under your limit. No trial-and-error with the slider, no re-exporting five times. This works for JPG and WebP output; PNG is a lossless format, so its size is controlled by dimensions rather than a quality setting.

Everything happens inside your browser using the canvas API. Your photos are never uploaded to a server, which matters when you are resizing passport photos, ID scans, signatures or other documents for government portals and job applications — the file goes from your device straight back to your device. One thoughtful detail: converting a transparent PNG to JPG fills the background with white instead of the black most converters produce, and the checkerboard preview lets you spot transparency before exporting.

Popular uses

  • ✦ Shrink a photo under an upload limit — 100 KB passport photos for exam, visa and government portals
  • ✦ Resize product photos to the exact pixel dimensions a marketplace or theme requires
  • ✦ Convert heavy PNG screenshots to lightweight WebP or JPG for faster-loading pages
  • ✦ Compress pictures before emailing them, without installing any software
  • ✦ Prepare avatars and profile photos at the exact size a platform asks for

Frequently asked questions

How do I compress an image to under 100 KB (or any size limit)?
Load the image, choose JPG or WebP as the format, type your limit — say 100 — into the "Target size (KB)" field and click Fit to size. The tool automatically tests several quality levels and picks the highest one that keeps the file under your limit. If the result still looks too soft, reduce the width and height first: fewer pixels means the same KB budget buys much better quality.
Why is the quality slider hidden when I select PNG?
PNG is a lossless format — it has no quality setting, so it always stores the image pixel-perfectly and the file size depends only on dimensions and image content. To make a PNG smaller, reduce its width and height, or switch to WebP or JPG, which compress far more aggressively at the cost of some (usually invisible) detail.
Are my photos uploaded anywhere when I resize them?
No. The image is read, resized on an HTML canvas, re-encoded and downloaded entirely within your browser — there is no server upload, and the page even works offline once it has loaded. That makes it safe for sensitive files like passport photos, ID documents, signatures and medical images that you would not want passing through a third-party server.
What happens to a transparent background when I convert PNG to JPG?
JPEG does not support transparency, so transparent areas must be filled with something. This tool fills them with white — the natural choice for logos, signatures and product shots — whereas many converters leave them black. If you need the transparency preserved, keep the file as PNG or convert to WebP, which supports an alpha channel at a much smaller file size.
Should I convert my images to WebP or stick with JPG?
WebP typically produces files 25-30% smaller than JPG at comparable visual quality and is supported by every modern browser, so it is the better choice for websites and anything you control. Choose JPG when compatibility matters most — government upload portals, older software, email clients and print shops sometimes accept only JPG or PNG.
Is Image Resizer & Compressor free to use?
Image Resizer & Compressor is 100% free — no signup, no watermarks and no usage limits. It’s one of 200+ free tools we build and give away.
Are my files uploaded anywhere?
No — everything happens locally in your browser, on your device. Your PDFs and images never leave your computer, so even sensitive documents stay completely private.

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