Convert Images Instantly
Privacy-first image converter running 100% in your browser. JPG, PNG, WebP, AVIF, BMP, GIF — with smart presets and bulk support. No upload. No login. No compromise.
Drop your image here
or click to browse — JPG, PNG, WebP, AVIF, BMP, GIF, HEIC
Why Use Scascan Image Converter?
Most online converters upload your file to a cloud server. We don't. Everything runs locally in your browser.
Total Privacy
Your images never leave your device. No server, no storage, no data collection.
Instant Conversion
Client-side Canvas API processing — most images convert in under a second.
Smart Presets
Result-focused presets for Web, Instagram, E-commerce, Email — no format expertise needed.
How to Convert Images Online
Upload
Drop any JPG, PNG, WebP, AVIF, BMP or GIF into the zone
Choose Preset
Pick Web, Instagram, E-commerce, or set custom quality
Convert
Browser converts instantly — no upload, no wait
Download
Slide to compare before/after and download the result
JPG vs PNG vs WebP vs AVIF — Which Format Wins?
Use this guide to pick the best format for your specific use case.
| Format | File Size | Transparency | Quality Loss | Browser Support | Best For |
|---|---|---|---|---|---|
| JPG | Small | ❌ | Yes (lossy) | Universal | Photos, email, print |
| PNG | Large | ✅ | No (lossless) | Universal | Logos, UI, screenshots |
| WebP | Very Small | ✅ | Optional | 96%+ browsers | All web images |
| AVIF | Smallest | ✅ | Optional | Modern browsers | Future-proof web |
| BMP | Very Large | ❌ | No | Universal | Windows legacy |
| GIF | Medium | ✅ | Quantized | Universal | Simple animations |
Use Cases — Websites, Shopify, Social Media & More
For Websites
- Convert all images to WebP for speed
- Reduce LCP time with smaller files
- Use AVIF for Lighthouse 100 scores
For Shopify
- Bulk convert product images to WebP
- Reduce file size without losing detail
- Faster storefront = more conversions
For Social Media
- Instagram preset: 1080px, JPEG 88%
- Prepare OG images as JPG
- Reduce file size for faster shares
For Email
- Auto-target under 200 KB per image
- JPG 75% is ideal for email clients
- Avoid attachment size limits
For Mobile
- Smaller images = less mobile data
- WebP loads 2x faster on mobile
- Improve mobile Lighthouse score
For Developers
- Batch convert assets before deployment
- Test AVIF vs WebP file sizes
- Generate multiple format fallbacks
Image Converter FAQ
Is this image converter completely free?
Yes, 100% free. No account, no subscription, no limits. We support this tool through non-intrusive ads.
What is the difference between JPG to WebP conversion?
Converting JPG to WebP typically reduces file size by 25–35% with the same or better visual quality. WebP supports transparency and is recommended by Google for web performance.
Can I convert images to AVIF online for free?
Yes. Scascan supports AVIF conversion directly in your browser. AVIF produces the smallest file sizes of any format — up to 50% smaller than JPG.
How do I reduce image file size without losing quality?
Convert to WebP or AVIF for significant size reduction with minimal visible quality loss. For lossless results, use PNG. The 'Optimize for Web' preset is tuned for the best quality-to-size ratio.
Does Scascan work offline?
Once the page loads, conversion works without internet. No network calls are made during processing.
How do I convert multiple images at once?
Use the Bulk Convert tab. Upload up to 20 images, set your format and quality, then convert all with one click. Download files individually or all at once.
More Free Privacy-First Image Tools
Everything runs in your browser. No uploads, no accounts.