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Image Compressor
Reduce weight without losing quality.
Compression
100% in your browser. No file is uploaded to any server.
Drag images or
JPG, PNG, WebP, AVIF · no limit
How this tool works
Images are 50%+ of total weight on most websites. A single uncompressed JPEG from a mobile camera can weigh 5–10 MB — that destroys your Core Web Vitals (LCP), Google ranking and mobile UX. Proper compression reduces weight by 60–80% with no visible quality loss.
This compressor uses the browser's canvas API to re-encode your images as JPEG, PNG, WebP or AVIF. Everything stays on your computer — no image is ever uploaded (important for private photos, screenshots with sensitive data, signed contracts). Supports batch processing and before/after size comparison.
Frequently asked questions
- Which format should I use?
- For web 2026: AVIF (best compression) > WebP (universal) > JPEG (photos without transparency) > PNG (logos, icons with transparency). Serving AVIF with WebP fallback is optimal.
- How low can I drop quality?
- JPEG/WebP: 75–85 is the sweet spot. Below 60 looks bad. PNG is lossless — the quality slider only affects smart compression (palette reduction).
- Why don't I see a difference at 90%?
- Human eye can't distinguish artifacts above quality 85 in natural images. Drop to 75 — you'll save 30% more without it being noticeable.
- What about EXIF metadata?
- Canvas re-encoding strips all EXIF (geolocation, camera model, timestamp). Good for privacy if uploading to social — bad if archiving.