Is my image uploaded anywhere?

No. 100% client-side. Every image is re-encoded in a browser canvas. Nothing leaves your device.

Which format compresses best?

WebP wins for photos (~25-35% smaller than JPG at same quality). JPG is safest for compatibility. PNG stays lossless but files are larger.

EXIF is stripped when re-encoding through a canvas — which is actually a plus for web publishing (removes camera model, GPS location leaks).

50-100 images on a modern laptop works fine. On phones, keep it under 20 to avoid memory issues.

Static GIFs are converted to static JPG/PNG/WebP. Animated GIFs will lose animation — use a dedicated GIF optimizer if you need to keep motion.

Shrink JPG, PNG and WebP by 40-90% — in your browser, batch supported, live size preview.

Choose images to compress or drag and drop here · JPG, PNG, WebP · batch supported

🔒 100% client-side. Every image is re-encoded locally in a canvas — nothing leaves your device.

Images are processed in your browser and never uploaded.

Drop images (or click to pick). JPG, PNG, WebP, GIF — anything the browser can decode.
Pick output format: 'Keep original' preserves each file's format, or convert everything to JPG / WebP / PNG.
Adjust quality (default 75%, sweet spot for most photos). Optionally set a max dimension to downscale huge images.
Click Compress all. Every image is re-encoded in-browser. Download each individually — live size comparison shown per file plus batch total.

Website performance. Slow-loading images hurt SEO and conversion. Compressing your image library from 3 MB average to 300 KB average can shave seconds off page load.
Email attachments. Squeeze 20 vacation photos under Gmail's 25 MB limit without deleting any.
Cloud storage savings. Compressing a photo library from 15 GB to 3 GB frees space on Google Drive, iCloud, Dropbox — free tier fits more, paid tier costs less.
Shopify / WooCommerce product photos. E-commerce platforms recommend under 200 KB per product photo. WebP at 75% quality nails this and looks identical.
Instagram / social media prep. Downscale to 1080 px max dimension and compress to 80% quality — visually indistinguishable from the original at Instagram's display resolution, half the upload time.

WebP is the modern winner — 25-35% smaller than JPG at the same visible quality. All modern browsers support it.
Quality 75% is the standard sweet spot. Below 60% starts showing artifacts on smooth areas like skies and skin.
Set 'Max dimension' to 1920 for typical web use, 3840 for retina / 4K displays.
Batch of 50-100 images works fine on desktop. On mobile, keep batches under 20 to avoid memory pressure.

Output is larger than input.: Your input was already highly compressed. Try higher compression (lower quality) or switch format to WebP.
PNG with transparency became opaque JPG.: JPG doesn't support transparency. Use PNG or WebP output to preserve it.
One file failed silently.: Unusual color profiles (CMYK, wide gamut) can trip the browser's canvas encoder. Convert those to sRGB in a photo app first.

Is my image uploaded anywhere?: No. 100% client-side. Every image is re-encoded in a browser canvas. Nothing leaves your device.
Which format compresses best?: WebP wins for photos (~25-35% smaller than JPG at same quality). JPG is safest for compatibility. PNG stays lossless but files are larger.
Does it preserve EXIF (camera info, GPS)?: EXIF is stripped when re-encoding through a canvas — which is actually a plus for web publishing (removes camera model, GPS location leaks).
How big of a batch can I do?: 50-100 images on a modern laptop works fine. On phones, keep it under 20 to avoid memory issues.
Can I compress GIFs?: Static GIFs are converted to static JPG/PNG/WebP. Animated GIFs will lose animation — use a dedicated GIF optimizer if you need to keep motion.