Kremlit Documentation
Free image and PDF optimization for the modern web. Convert to WebP, AVIF, JXL, and compress PDFs with our online tools or API.
Image Formats
Learn about WebP, AVIF, JXL and when to use each format.
Image API
Integrate image optimization into your applications.
PDF API
Compress PDFs with Ghostscript-powered optimization.
Transform API
Resize and crop images. Returns binary for WordPress plugins.
Online Optimizer
Optimize images directly in your browser, no signup required.
Quick Start
No API key required. Start optimizing images immediately:
curl -X POST https://api.kremlit.dev/api/v1/optimize \ -F "[email protected]" \ -F "output_format=webp" \ -o optimized.webp
Rate Limits
| Limit | Value |
|---|---|
| Requests per hour | 500 |
| Max file size (Image) | 20 MB |
| Max file size (PDF) | 50 MB |
| Concurrent requests | 10 |