Free image tool
Compress Image
Reduce image file size for faster sites, email, and uploads — pick a target size or quality and download instantly. Everything runs in your browser — your image never leaves your device, so it is fast, free, and private.
- 🔒 No upload — runs in your browser
- 🆓 Free, no signup
- 🚫 No watermark
- ♾️ No limits
How to compress image
Upload images
Drop in JPG, PNG, or WebP files — single or batch.
Choose quality or target size
Pick a quality level, or set a target file size (e.g. 100 KB) and let the tool find the best quality that fits.
Download smaller files
Save individually or as a ZIP. See exactly how much size you saved.
Why use this tool
🎯 Hit an exact target size
Type "100 KB" and the tool finds the highest quality that fits under it automatically.
📈 Faster pages & uploads
Smaller images improve Largest Contentful Paint, a Google Core Web Vitals metric.
🔒 100% private
Compression runs locally in your browser — images are never uploaded to a server.
Common use cases
Email attachment limits
Get camera photos under 25 MB (or stricter limits) without visible quality loss.
Website performance
Shrink hero and product images to hit Google’s 2.5-second "good" LCP threshold.
Form upload caps
Meet a portal’s "max 2 MB" rule without leaving your browser.
Storage & backups
Free up phone or cloud storage by compressing a whole batch of photos at once.
How much can you compress before it looks bad?
Further than most people assume. JPEG and WebP quality sliders are not a linear "goodness" scale — the top of the range spends enormous file size on differences invisible to the human eye. Most photographs hold up fine at quality 60–80 with zero visible change at normal viewing size; Google’s own Squoosh compression tool defaults to quality 75. Visible artifacts — blockiness in skies and skin tones, "ringing" around sharp edges — typically start appearing below quality 50.
Content type changes the answer. Photographs compress beautifully because JPG’s math was designed for smooth gradients and natural texture. Screenshots, text, and flat-color graphics compress badly by comparison — for those, a lossless format like PNG (or lossless WebP) is usually the better choice, even though this tool can compress them too.
Target file size vs. quality slider — which should you use?
Use "target file size" when you have a hard constraint — an upload cap, an email limit, a marketplace requirement — and let the tool search for the highest quality that fits. Use the quality slider directly when you want manual control and are comparing the live preview yourself.
Either way, resize first if the image is far larger than it needs to be: a 4,000 px camera photo has roughly 25× the pixels of the 800 px version a blog column actually displays, and no compression setting recovers bytes that resizing would have saved for free. Use the image resizer first, then compress. The full order-of-operations is covered in the guide below.
Pro tips for compress image
- Resize to display dimensions before compressing — it removes far more bytes than quality tuning alone.
- Compare at 100% zoom on gradients and edges, not the whole thumbnail, to judge real quality loss.
- Never flatten a transparent PNG to a lossy format if you still need the alpha channel — export PNG or lossless WebP instead.
Frequently Asked Questions
How do I compress an image to a specific size (like 100 KB)?
Upload your image, choose "Target file size", type your limit (e.g. 100 KB), and the tool automatically finds the highest quality that fits under it.
Does compressing reduce quality?
Compression trades some quality for a smaller file. The live preview and size readout let you balance the two before downloading.
Is it really free with no upload?
Yes. Everything runs in your browser — your image never leaves your device, so it is fast, free, and private.
Does compressing an image reduce its quality?
Lossy compression does discard data, but at sensible settings (quality 60–80) the discarded data is detail human eyes can’t perceive at normal viewing size. Lossless compression modes reduce size with zero quality change, though the savings are smaller.
How do I compress an image to under 100 KB?
Choose "Target file size", enter 100 KB, and the tool automatically searches for the highest quality setting that still fits under that limit — no manual trial and error.