Compress Images Online
Reduce image file sizes while maintaining quality. Supports JPEG, PNG, WebP, and AVIF. Process up to 50 files at once, all in your browser.
What this tool does
Large image files slow down websites and eat up storage space. This tool compresses JPEG, PNG, WebP, and AVIF images directly in your browser - no upload required. You can process a single photo or batch compress up to 50 files at once, then download them individually or as a ZIP archive.
How it works
1. Upload your images
Drag files into the drop zone or select them from your device. The tool loads them into your browser's memory - they never leave your computer.
2. Set the quality level
Move the quality slider to find your balance between file size and visual fidelity. Around 80-85% usually cuts file size in half without noticeable quality loss.
3. Preview and download
See a side-by-side comparison of original vs compressed. When you're satisfied, download individual files or grab everything as a ZIP.
When you'd use this
Speeding up a slow WordPress site
Hero images from your photographer are probably 5-10MB each. Compressing them to WebP at 85% quality can drop them to 200-500KB without visible degradation - your page load times will thank you.
Getting past email attachment limits
Gmail cuts you off at 25MB. If you need to send 20 event photos that total 80MB, running them through this compressor first can shrink the batch down enough to fit in a single email.
Freeing up phone or hard drive space
Raw photos from a weekend shoot can fill gigabytes fast. Compressing older images to 70-75% quality frees up substantial storage while keeping them perfectly viewable.
Meeting upload requirements for portals
Government websites, job applications, and university portals often reject files over 2MB. You can dial down the quality until your passport scan or transcript fits within their limits.
Reducing mobile app bundle size
If you're shipping a React Native or Flutter app, every megabyte matters. Compressing UI assets and background images with AVIF encoding can shave megabytes off your download size.
What to know before using it
Lossy vs lossless compression
This tool uses lossy compression, which permanently removes some image data to reduce file size. At 85% quality or higher, the difference is typically invisible to the human eye. If you need mathematically identical output, use PNG format instead of JPEG.
Format matters for file size
WebP and AVIF produce significantly smaller files than JPEG at equivalent quality levels - but older browsers may not support them. If you need universal compatibility, stick with JPEG.
Transparent backgrounds require PNG or WebP
JPEG doesn't support transparency. If your image has a transparent background, choose PNG or WebP as the output format to preserve it.
Browser performance depends on your hardware
Since processing happens locally, compressing 50 high-resolution images on an older laptop will take longer than on a newer machine. The tool won't crash - it just uses your available RAM and CPU.
FAQs
Will compressing images ruin the quality?
At 80-90% quality, most people can't spot the difference without pixel-peeping. The file size reduction is substantial - often 50-70% smaller. If you need zero quality loss, use PNG format instead of JPEG.
Are my images uploaded to a server?
No. Everything happens in your browser using WebAssembly compression libraries. Your photos never leave your device, which means faster processing and complete privacy.
How many images can I compress at once?
You can process up to 50 files in a single batch. The tool queues them and works through each one sequentially. When finished, you can download all of them as a ZIP file.
Which format gives the smallest file size?
AVIF typically produces the smallest files, followed by WebP, then JPEG. However, AVIF and WebP aren't supported in older browsers. For maximum compatibility with decent compression, JPEG at 85% quality is still the safe choice.
Can I resize images while compressing?
Yes. The advanced settings include width and height inputs. Reducing a 4000px-wide photo to 1920px before compressing will give you dramatically smaller files than compression alone.
Is there a file size limit?
There's no enforced limit since processing happens on your device. The only constraint is your browser's available memory - if you try to load a 100MB TIFF file on a laptop with 4GB RAM, your browser may struggle.
Attribution: This tool uses compression libraries from Squoosh, an image compression tool developed by Google Chrome Labs.