What is Image Compressor & Resizer?
Reduce image file sizes instantly without losing noticeable quality. Convert between PNG, WebP, JPEG, and AVIF formats, resize with five different modes, and control compression quality — all running 100% in your browser with zero uploads.
How to use
- Upload or drag-and-drop your image (PNG, JPEG, WebP, BMP, or GIF)
- Choose your output format (WebP, PNG, JPEG, or AVIF) and quality level
- Pick a resize mode: original, max dimensions, exact pixels, scale by percentage, or social media presets
- Click "Compress" and download the result
When to use each format
- WebP — Best for web use. Smallest files with transparency support. Works in all modern browsers.
- AVIF — Next-generation format with even better compression than WebP. Growing browser support.
- PNG — Lossless compression. Best when you need pixel-perfect output or transparent backgrounds.
- JPEG — Smallest for photos without transparency. Not suitable for logos or screenshots with text.
Resize modes
- Original size — Keep the image dimensions, only change format and quality
- Max dimensions — Scale down proportionally so width/height don't exceed your limits
- Exact dimensions — Set precise width and/or height (may stretch the image)
- Scale by % — Shrink or enlarge by a percentage (5% to 200%)
- Social media preset — One-click sizes for Instagram, Facebook, Twitter/X, LinkedIn, YouTube thumbnails, and more
Tips for best results
- For photos: WebP or AVIF at 75-85% quality gives excellent results at a fraction of the original size
- For screenshots/text: PNG preserves sharpness perfectly
- For social media: use the built-in presets to get the exact dimensions each platform expects
- After removing a background, compress the result here to reduce the file size while keeping transparency
Privacy & security
Your images are never uploaded to any server. All processing happens locally using the browser's OffscreenCanvas API. Close the tab and your data is gone.
Limitations
- Maximum input size: 50 MB
- AVIF support depends on your browser (Chrome 85+, Firefox 93+, Safari 16.4+)
- Very large images may be slow on older devices