image compressor

How to use the image compressor

  1. Drag-and-drop one or more images — supports JPG, PNG, WebP, and AVIF up to 50 MB each.
  2. Pick a quality level: 'visually lossless' (85-90%), 'balanced' (75-80%), or 'aggressive' (60-70%). The preview shows the before/after side-by-side.
  3. For pixel-perfect control, open advanced and tune chroma subsampling, mozjpeg vs libjpeg encoder, and progressive JPEG flag.
  4. Compression runs entirely in your browser — images never leave your device.
  5. Download compressed files individually or as a zip.

When to use it

Browser-side compression is instant, private, and free up to the 50 MB-per-file cap. Use it for one-off optimizations before uploading to a blog, marketplace, or portfolio. For production pipelines (WordPress image optimization, e-commerce catalogs with thousands of images), use a server-side tool or image CDN like Cloudflare Images, which compresses on upload and serves the right format per device. Alternative: TinyPNG is the market leader for browser compression but limits free users to 20 images per session.

Example

A 3.2 MB iPhone JPEG at quality 85 compresses to ~720 KB with no visible change. The same image at quality 70 compresses to ~380 KB — acceptable for thumbnails and blog content but visible on hero images at full size.

Frequently asked questions

Does this compress images without losing quality?
True 'lossless' compression only helps PNG files (typically 5-15% smaller). For JPG, WebP, and AVIF, compression is always lossy — 'visually lossless' means the difference is imperceptible at normal viewing distance, not pixel-identical.
Is there a file size limit?
50 MB per file, no limit on the number of files per session. For larger images, resize first with a dedicated resizer.
Does it support HEIC?
Convert HEIC to JPG first using the image format converter, then compress.
Are my images uploaded to your server?
No. Compression runs entirely in your browser using WebAssembly. Files never leave your device.
WebP, AVIF, or JPG — which should I pick?
AVIF for modern browsers (Chrome 85+, Safari 16.4+, Firefox 93+), WebP as a fallback, JPG only if you need to support IE11 or very old email clients. AVIF typically compresses 20-30% smaller than WebP at the same perceptual quality.

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Last updated: 2026-04-22