Resize many images at once
Set a max width, height, longest side or percentage, and resize a whole folder at once. Lanczos resampling keeps edges crisp. Nothing is uploaded.
- Free, no sign-up
- Runs in your browser. Your files never leave your device.
- Updated
or paste an image with Ctrl V
How do I resize images?
- Under Resize, pick Max width, Max height, Longest side or Percentage, and type the size. It starts at 1920 px wide.
- Drop images or a folder on the box above, or paste one.
- Each row shows the old and new dimensions and file size. Download the images one by one or as a .zip.
The format stays the same unless you pick another under Format. The tool remembers the size you set for your next visit.
What size should I use?
| Where the image goes | A sensible size |
|---|---|
| Full-width on a website | 1920 px wide (2560 for large, sharp screens) |
| Inside an article or blog post | 1200–1600 px wide |
| Email attachments and chat | 1600 px on the longest side (the For email quick setup) |
| Thumbnails and avatars | 400–800 px on the longest side |
| A quick, smaller copy of anything | 50% |
These are rules of thumb for screens. If a site or form asks for an exact size, use that.
Why resize and compress together?
A phone photo is often 4000 px or more across, about twice what any laptop screen shows. Halving the width cuts the pixel count to a quarter, so the file usually drops by far more than compression alone can manage, with no visible loss at the size it is shown. The quality setting then trims what is left.
Does it work with PNG transparency and screenshots?
Yes. Transparent images keep their transparency, and the resampling is premultiplied so edges do not pick up dark fringes. For screenshots with small text, do not shrink below about 75%, or the text gets hard to read.
Questions
Can I resize many images at once?
Yes, up to 1,000 per batch, or a whole folder dropped in one go. Every image gets the same rule (a max width, say). The .zip keeps your folder structure.
Will resizing stretch or crop my images?
Neither. The aspect ratio always stays the same, and the tool only ever makes images smaller. A photo already narrower than your max width keeps its size.
What is the difference between max width and longest side?
Max width limits only the width, so tall portrait photos can stay tall. Longest side limits whichever side is bigger, so landscape and portrait photos end up the same overall size. Percentage scales every image by the same amount.
Does resizing reduce quality?
Fewer pixels means less detail. But the tool shrinks images with care. It uses Lanczos resampling in linear light, the method Squoosh uses. This keeps edges crisp and avoids the dark halos that quick resizers leave. Pick Best if you want the least compression on top.
Can I resize to a file size instead?
Yes. Set “Aim for” to A file size with “Shrink the pixels if needed” on. The tool then makes each image only as much smaller as it takes to get under the size.
Are my images uploaded?
No. Resizing and compressing both happen in your browser, so nothing leaves your device.
More free tools
- Image Compressor Shrink JPG, PNG, WebP and AVIF images, one or hundreds at a time.
- Compress JPG Make JPG photos smaller, or get them under a size like 200 KB.
- Compress PNG Shrink screenshots and logos. Uses a 256-color palette and keeps transparency.
- JPG to WebP Save photos as WebP, usually a quarter to a third smaller.
- PNG to WebP Turn PNGs into much smaller WebP files. Transparency stays.
Save what you find in one click.
Kortex is a Chrome extension for Gemini Notebook (formerly NotebookLM). It sends AI chats, web pages, posts and YouTube videos into the notebook you pick. It keeps your notebooks organized. It exports them back out.
No card needed.