Smart Compression
Dial in quality with a live slider, or set a target file size and let it auto-tune for you. Lossy and lossless where the format allows.
Free, unlimited & fully private
Shrunk
The ultra-fast, privacy-first free image resizer and compressor.
100% client-side
Unlimited batch & ZIP
No watermarks
100% private — files never leave your device
The guide
How to compress and resize images the modern way
Heavy images are the single biggest reason pages feel slow. Shrunk is a free image resizer and free image compressor built to fix that in seconds. You can compress image online, resize JPEG files, and shrink image size without installing a single app. Drag in one photo or a whole folder and the batch image resizing tool handles the rest, giving you a fast, dependable way to reduce image size before you publish, email or upload.
Choose a modern format: WebP and AVIF
Format choice matters more than any quality slider. Switching a JPEG or PNG to WebP often cuts the file by 25–50% at the same visual quality, and AVIF can go further still, frequently halving WebP again on photographic content. That is why Shrunk works as a free WebP optimizer: you can compress WebP online for the web, or compress PNG without losing quality when you need crisp logos, screenshots and transparency. For everyday photos, this online photo compressor lets you crush image file size while keeping detail your viewers actually notice.
Resize by pixels and respect aspect ratio
Dimensions are the other half of the equation. A 6000 px camera export displayed in a 400 px column wastes enormous bandwidth. Shrunk lets you resize image in pixels with aspect-ratio lock on by default, so width and height scale together and your photos never look stretched. Set an exact width, match a social preset, or use the bulk image resizer to normalise hundreds of files to one consistent size. Pairing the right pixel dimensions with a modern format is the fastest path to a genuinely fast image shrinker workflow.
Private by design, instant by default
Everything runs locally in your browser. There is no upload, no queue and no server copy, which is what makes this true privacy-first image compression: your files never leave your device. Because the work happens on your own machine, results appear the moment processing finishes — no round trip to wait on.
Built for developers and creators
For developers, Shrunk doubles as a no-friction
image optimizer tool in the front-end
workflow: lighter assets mean smaller bundles, faster Largest Contentful Paint and better
Core Web Vitals, without adding a build dependency. Target a specific kilobyte budget to
satisfy strict upload limits, export responsive sizes for srcset,
and ship WebP or AVIF with confidence. Whether you are trimming a hero banner or running a
full batch, it is a quick, private way to keep every image lean.
Features
Everything you need to ship lighter images.
The depth of a pro tool with the speed of a single drag-and-drop. Built to be faster, cleaner and more private than anything else.
Precise Resizing
Resize by pixels or percentage with aspect-ratio lock, or pick a ready-made preset for Instagram, X, LinkedIn, 1080p, 4K and more.
Format Conversion
Convert freely between JPG, PNG and WebP. Modern formats like WebP can shrink your images by 50–90% with no visible loss.
True Batch Workflow
Drop hundreds of images at once. Apply global settings to everything, then fine-tune individual files that need special treatment.
Before / After Preview
Drag the comparison slider to inspect quality at full resolution, with exact original vs. new size and percentage saved.
One-Click ZIP
Download any single image, or grab everything as a single ZIP archive — packaged instantly, again without any server.
Privacy by design
Your images never leave your device.
Most "online" compressors quietly send your photos to a server. We don't — and we can't. All processing happens locally in your browser, so your private photos, client work and screenshots stay private.
- Images are decoded, resized and re-encoded entirely by your browser using Web Workers.
- Nothing is uploaded — there is no server to receive your files in the first place.
- Works fully offline once loaded. No accounts, no tracking pixels, no cookies for processing.
▶ drop 248 images
# decode → resize → encode (in-browser)
network requests : 0
bytes uploaded : 0 B
avg size saved : 71%
done : ✓ all localHow It Works
Three steps. Zero friction.
- 01
Drop your images
Drag and drop, browse, or paste from your clipboard. Add as many as you like — there are no limits.
- 02
Tune the output
Pick a format, set quality or a target size, and resize with presets or exact dimensions. Previews update live.
- 03
Download
Save images one by one, or export the whole batch as a single ZIP. Done — nothing was ever uploaded.
FAQ
Frequently asked questions.
Everything else you might want to know before you drop your first image.
Are my images really private?
Yes. All compression, resizing and conversion runs locally in your browser using Web Workers and the Canvas API. There is no upload step and no server that receives your files. You can even disconnect from the internet after the page loads.
Which formats are supported?
You can open JPG, PNG, WebP, AVIF, GIF and BMP, and export to JPG, PNG or WebP. WebP typically produces the smallest files for the web.
Is there a limit on file count or size?
There is no artificial limit. Because everything runs on your own machine, the practical limit is your device’s memory. Very large batches process a few images at a time to stay responsive.
What does “target size” do?
Enter a size in kilobytes and the encoder automatically searches for the highest quality that fits under your target. It’s perfect for meeting upload limits on forms and marketplaces.
Does it cost anything?
No. Shrunk is free to use with no account, no watermarks and no usage caps.
Can I use my phone as an image compressor?
Yes. Shrunk runs entirely in your phone’s browser, so you can use any iPhone or Android device as an image compressor — no app to install. Open the site in Safari or Chrome, pick photos from your camera roll, and they are compressed locally on the device without being uploaded anywhere.
Is there an image resizer online?
Yes. Shrunk is a free online image resizer. Drag in a JPG, PNG or WebP, enter the exact width and height in pixels or choose a preset, and download the resized file. Everything happens in your browser, so there is nothing to install and your images stay private.
How to identify aspect ratio?
Aspect ratio is the relationship between width and height. Divide the pixel width by the height and simplify — for example, 1920×1080 simplifies to 16:9, and 1080×1080 is 1:1. When you load an image into Shrunk it shows the exact dimensions and keeps the ratio locked while you resize so photos never look stretched.
How to measure image pixels online?
Drop your image onto Shrunk and the exact pixel width and height are displayed instantly. Because the file is read locally in your browser, you can measure image pixels online without uploading the photo to any server.
Can a smartphone resize photos?
Yes. Modern smartphones can resize photos directly in the browser. Open Shrunk on your phone, select an image, and resize it by pixels or percentage with aspect-ratio lock. The processing runs on the device, so it works even on mobile data and keeps your photos private.
Can I use my camera photo to downscale?
Absolutely. High-resolution camera photos are often far larger than needed for the web. Open the full-size JPEG (or HEIC after exporting to JPG) in Shrunk and downscale it to a smaller pixel dimension, then compress it to shrink the file size while keeping the detail you want.
Can we compress images online?
Yes. You can compress images online with Shrunk in JPG, PNG and WebP formats. Adjust the quality slider or set a target file size in kilobytes, and the encoder finds the best result. All compression is client-side, so your images are never sent to a server.
How to read image dimensions online?
Drag the file into Shrunk and the width × height in pixels appears immediately, along with the file size. It is the quickest way to read image dimensions online because the file is parsed locally and nothing is uploaded.
How to view image properties in Word online?
In Word for the web, select the picture, then open the Picture or Layout options to see its display size. Word does not show the original pixel dimensions or file weight, so for exact image properties drop the same file into Shrunk and read its pixel size and file size instantly.
How to resize an image in Word online?
In Word for the web, click the image and drag a corner handle, or use Picture → Layout Options to set the height and width. This only changes how large it appears on the page — to actually reduce the underlying file size, resize and compress the image in Shrunk first, then insert it into your document.
How to compress photos in PowerPoint online?
PowerPoint for the web offers limited image compression. For reliably smaller decks, compress your photos in Shrunk first — convert them to WebP or reduce the quality to a target size — then insert the lighter images. Your presentation stays sharp while the file size drops significantly.
How to use an online image resizer?
Open Shrunk, drag one or more images into the drop zone, then enter your desired width or height in pixels (or pick a preset) with aspect-ratio lock enabled. Preview the result and download the resized file, or grab a whole batch as a single ZIP.
How to shrink image file size in Word online?
Word online does not expose strong compression controls, so the most effective approach is to shrink the file before inserting it. Compress the image in Shrunk — reduce its pixel dimensions and export to WebP or a lower-quality JPEG — then add the smaller file to your Word document.
How to use a photo compressor online?
Open Shrunk, drop your photos into the tool, and choose a quality level or a target size in kilobytes. Use the before/after preview to check the result, then download each photo or export the entire batch as a ZIP. The whole process runs in your browser for fast, private results.