Image Compressor
Free online image compressor for JPEG, PNG and WebP. Reduce image file size directly in your browser — no uploads, fully private.
Click or drag images here
Supports JPG / PNG / WebP
Image Compressor guide
Why compress images?
A photo straight from a phone camera weighs 3-8 MB. Upload that to a website, email or a job application portal and you hit limits, slow pages and frustrated readers. Compression reduces the file to a few hundred kilobytes with no visible difference — the single easiest way to speed up a website or fit under an upload cap.
The gains compound: Google research shows that as page load goes from 1 to 3 seconds, bounce probability rises 32%. Images are usually the heaviest asset on a page, so compressing them is the first thing to try.
JPEG vs PNG vs WebP: choosing the right format
JPEG is the all-rounder for photos: millions of colors, small files, universally supported. PNG is lossless and supports transparency — right for logos, screenshots and graphics with sharp edges, wrong for photos (files get huge). WebP is the modern option: it does both roles and typically beats JPEG by 25-35% at the same visual quality.
| Output format | Typical size | Best for |
|---|---|---|
| Original (phone) | 3-8 MB | Archiving, printing |
| JPEG quality 85 | 400-900 KB | Email, websites, general use |
| PNG | 4-10 MB | Never for photos — graphics only |
| WebP quality 85 | 300-600 KB | Modern websites, smallest files |
How much quality can you afford to lose?
Compression quality is logarithmic: the first losses are invisible, the last ones ruin the image. A practical rule: 85 is the sweet spot for photos, 70-80 for web thumbnails, above 90 only when you will re-edit the image later. Below 60, JPEG artifacts appear around text and sharp edges.
One warning: JPEG compression is lossy and accumulates. Re-saving a compressed JPEG repeatedly degrades it further — always keep the original and compress fresh copies for each use.
Browser-based compression vs online servers
Most online compressors upload your images to a server, compress them there and send them back. That means your photos travel the internet, get stored (often indefinitely), and the speed depends on your upload bandwidth. This tool works differently: it uses your browser's built-in image encoder, so files never leave your device.
The practical difference: a 5 MB photo uploads in seconds on fast connections but takes much longer on mobile data — and never uploads at all here. It also means confidential documents (IDs, contracts, medical images) are safe to compress without a second thought.