How to compress images without losing quality (free, online)
High-resolution photos make websites slow and get emails rejected for being too large. The good news: you can shrink image size dramatically with almost no visible quality loss — free, no app, and without uploading your files to anyone's server.
How to compress an image (4 steps)
- Open the tool — use our compress image. It runs entirely in your browser, so your photo is never uploaded.
- Pick a photo — JPG, PNG, or WebP.
- Set quality & width — start at 75–80% quality and cap the max width (e.g. 1600px for web, 1080px for social).
- Download — compare before/after, then save the best fit.
Recommended settings
| Use | Max width | Quality | Format |
|---|---|---|---|
| Website photos | 1600–2000px | 75–82% | WebP / JPG |
| Social media | 1080–1350px | 80% | JPG |
| Email attachments | 1280px | 72–78% | JPG |
| Thumbnails | 400–600px | 70% | WebP |
Why size drops without going blurry
The human eye isn't very sensitive to subtle color detail. Compression (especially JPG and WebP) discards the information you're least likely to notice first. As long as quality isn't pushed too far (below ~60%), the result still looks sharp — while size drops 50–80%.
JPG, PNG, or WebP?
- JPG — best for photos. Small size, good quality.
- PNG — for transparency or crisp graphics (logos, text screenshots). Larger files.
- WebP — usually the smallest at equivalent quality; ideal for modern web.
Need to change format too? See image converter.
Tips to stay sharp
- Don't upscale small images — compression can't add detail, only remove.
- Reduce width first, then quality — shrinking dimensions is often enough.
- Keep the original master — compress from a copy, never overwrite the original.
- Check at full screen before saving a low-quality version.
Safe for personal photos?
Yes. Because this tool processes images in your browser, photos are never sent to any server.
FAQ
Is it free and watermark-free? Yes — free, no sign-up, clean results.
How many photos at once? Process them one at a time on your device; for many photos, repeat quickly with no quota.
What quality is safe? 75–80% is almost always safe. Below 60% is where it starts to show.
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