Free Online Image Compressor — 100% Local, Privacy First

Image Compressor is a free image compression tool that runs entirely in your browser. No files uploaded to any server, no sign-up required, no watermarks. Supports JPG, PNG, WebP, and AVIF compression and conversion, with automatic target-size compression (200KB/100KB/50KB), batch processing, and ZIP export.

Key Features

• 100% Private — All processing happens locally in your browser
• Target Size — Set exact size (200KB/100KB/50KB), auto-adjusts quality
• Multi-format — JPG / PNG / WebP / AVIF compression & conversion
• Batch & ZIP — Upload multiple files, compress all, export as ZIP
• Bilingual — Chinese and English UI, auto-detected
• No Watermark — Output is completely clean, no branding

Use Cases

• Email Attachments — Compress photos under 200KB for reliable delivery
• Web Optimization — Reduce image sizes to improve Core Web Vitals scores
• Job Applications — Fit headshots and documents into 200KB/100KB limits
• E-commerce — Batch compress product images for Shopify, Amazon, etc.