# CATLK - Smart Image Compressor

> Free online image compressor that runs entirely in your browser. No upload to server, 100% private. Supports PNG, JPG, WebP, GIF.

## About

CATLK (https://catlkimg.com) is a free, privacy-first image compression tool. All image processing happens locally in the user's browser using the Canvas API. No images are ever uploaded to any server, ensuring complete privacy.

## Key Facts

- **Name**: CATLK - Smart Image Compressor
- **URL**: https://catlkimg.com
- **Price**: 100% Free, No registration required
- **Processing**: Client-side (browser-based, no server upload)
- **Supported Formats**: PNG, JPG, JPEG, GIF, BMP, WebP
- **Output Formats**: PNG, JPG, WebP
- **Batch Size**: Up to 20 images per session
- **Quality Range**: 1-100% (default 92%)
- **Languages**: English, Chinese, Japanese, Korean, Spanish, French, German, Portuguese, Italian, Russian, Arabic, Hindi, Bengali, Vietnamese, Turkish (15 languages)
- **Privacy**: GDPR-compliant, zero data collection, no cookies for tracking
- **Ads**: Google AdSense (privacy-friendly, consent mode enabled)
- **Analytics**: Google Analytics 4 with consent mode

## How It Works

1. User uploads images via drag-and-drop or file picker
2. User selects target format and quality (1-100%)
3. JavaScript uses Canvas API to compress images in the browser
4. User previews and downloads compressed images
5. All data is discarded when the browser tab is closed

## Why CATLK?

- **Privacy First**: Images never leave your device
- **Free Forever**: No subscriptions, no hidden fees
- **No Registration**: Use immediately, no account needed
- **Fast**: Browser-native processing, no upload/download time
- **Multi-language**: Available in 15+ languages
- **Mobile Friendly**: Works on all devices

## Use Cases

- Compressing photos for websites
- Reducing file size for email attachments
- Converting between image formats (PNG, JPG, WebP)
- Batch processing for e-commerce product images
- Optimizing images for social media
- Reducing storage space on devices

## Technical Details

- **Frontend**: React 18, TypeScript, Vite
- **Styling**: Tailwind CSS, shadcn/ui
- **Compression**: Canvas API (browser native)
- **i18n**: react-i18next
- **Hosting**: Static site (Hostinger)
- **PWA**: Service Worker enabled for offline use

## Trust & Safety

- HTTPS enforced
- Content Security Policy (CSP) configured
- No third-party tracking without consent
- AdSense with Google Consent Mode v2
- Transparent privacy policy
- Clear terms of service

## Citations & Statistics

- Privacy-first approach: 0 images uploaded to server
- Free for unlimited use
- Available in 15+ languages
- Works on all modern browsers (Chrome, Firefox, Safari, Edge)
- Mobile responsive design
- 100% client-side processing

## Contact

- Website: https://catlkimg.com
- Email: contact@catlkimg.com
- Privacy Policy: https://catlkimg.com/privacy-policy
- Terms of Service: https://catlkimg.com/terms-of-service

## Comparison

| Feature | CATLK | TinyPNG | Squoosh | iLoveIMG |
|---------|-------|---------|---------|----------|
| Free | ✅ | ✅ (limited) | ✅ | ✅ (limited) |
| No Upload | ✅ | ❌ | ❌ | ❌ |
| Batch | ✅ (20) | ✅ | ❌ | ✅ |
| No Signup | ✅ | ✅ | ✅ | ❌ |
| Multi-lang | ✅ (15) | ❌ | ❌ | ❌ |
| API | ❌ | ✅ | ❌ | ✅ |

Last Updated: 2025