Image Compressor
Compress JPEG, PNG and WebP images in your browser without losing quality.
Shrink images without visible quality loss
Large images are the single biggest source of slow web pages. A properly compressed JPEG or WebP can be 5-10x smaller than the camera original while looking identical to the human eye. This compressor runs entirely in your browser — your files never leave your device.
What it does
- Re-encodes your image at the quality level you choose.
- Rescales the image so its longest side fits within your max-dimension setting.
- Picks an efficient encoder (JPEG for photos, WebP if available) while preserving the original format.
- Reports the size savings so you can compare before/after at a glance.
Choosing a quality level
- 85–95% — archival / print / portfolio work. Nearly indistinguishable from original.
- 70–85% — body photos inside blog posts, e-commerce product pages. The sweet spot for most web use.
- 50–70% — thumbnails and grid views, where detail is less important.
Why size matters
Google’s Core Web Vitals penalize slow-loading pages. A heavy image directly impacts the Largest Contentful Paint (LCP) metric, which in turn affects search rankings and conversion. Most sites are 60-80% images by weight — compressing them is usually the single biggest performance win available.
Privacy
Everything happens locally. The file reads, compressions, and downloads are all confined to your browser’s memory. We do not log, store, or upload anything.
Frequently asked questions
- Is my image uploaded anywhere?
- No. The compressor runs entirely in your browser, using a web worker for performance. Your image is read from your disk, compressed in memory, and offered as a download — it never reaches a server.
- What quality setting should I use?
- For web photography, 75%–85% is the sweet spot — visually near-identical to the original but much smaller. Use 90%+ for product photos and portfolio work; 50%–70% for thumbnails and grid images.
- Why does the output look different in color?
- Some image decoders handle color profiles differently. If you are seeing subtle shifts, ensure your original has a standard sRGB profile. Non-standard profiles can be stripped during compression.