Image Compressor
Compress images to reduce file size while maintaining quality. Supports JPEG, WebP, and PNG output. All processing happens in your browser — no uploads to any server.
Related Tools
Format Comparison
| Format | Best For | Compression | Transparency |
|---|---|---|---|
| JPEG | Photos, complex images | Lossy — excellent size reduction | No |
| WebP | Web images, modern browsers | Lossy or lossless — best ratio | Yes |
| PNG | Graphics, screenshots, logos | Lossless — larger files | Yes |
Frequently Asked Questions
Is my image uploaded to a server?
No. All compression happens entirely in your browser using the HTML5 Canvas API. Your images never leave your device — no data is sent to any server. This makes it completely private and works offline too.
What quality setting should I use?
For photos and social media, 75-85% offers the best balance of quality and file size — typically 60-80% size reduction with minimal visible quality loss. For print or professional use, stay above 90%. For thumbnails or email, 50-70% is usually fine.
Which format should I choose?
JPEG is best for photographs and complex images (no transparency). WebP offers 25-35% better compression than JPEG with transparency support — ideal for web use if your target browsers support it (all modern browsers do). PNG is best when you need lossless quality or transparency in graphics/logos.
Why is my PNG file getting larger after 'compression'?
PNG is a lossless format — the browser's Canvas API re-encodes it without guaranteed size reduction. For photos, switch to JPEG or WebP for significant compression. PNG works best for graphics with flat colors, text, and screenshots.
Can I compress multiple images at once?
Currently this tool handles one image at a time for the best quality control. Upload a new image after downloading the compressed version. For bulk compression, consider using the same tool repeatedly — each compression takes just seconds.