# LemonArt

> LemonArt is a privacy-first browser image toolkit at https://art.lemonhub.online/.

## What it does

- Image format conversion: PNG, JPG, WebP, AVIF, GIF, BMP, SVG, TIFF, ICO, TGA, DDS, QOI, PPM, PGM, PBM, PAM, XPM and Farbfeld.
- Image compression: local WebP and JPG compression with quality controls, batch processing and actual size comparison.
- Image preprocessing: drag-based crop, resize, brightness, contrast, saturation, grayscale, rotation, flipping and OpenCV.js filters.
- Image repair: local OpenCV.js inpainting with Telea and Navier-Stokes methods, brush masks, denoising and background removal.

## Privacy and technical facts

- Images are processed in the current browser and are not uploaded to a business server.
- Object URLs and in-memory Blobs are released when files are removed or the editor is closed.
- OpenCV.js is loaded on demand only for computer-vision operations; SIMD capability is detected with a safe fallback to standard WebAssembly.
- Vue 3, Vite and TypeScript power the interface; Cloudflare Pages serves the static build.

## Primary tools

- [Image conversion](https://art.lemonhub.online/zh/convert/)
- [Image compression](https://art.lemonhub.online/zh/compress/)
- [Image preprocessing](https://art.lemonhub.online/zh/edit/)
- [Image repair](https://art.lemonhub.online/zh/repair/)

## Technical articles

- [Browser image processing with OpenCV.js and Canvas](https://art.lemonhub.online/zh/blog/browser-image-processing-opencv-js/)
- [OpenCV.js production deployment and WebAssembly paths](https://art.lemonhub.online/zh/blog/opencv-js-production-deployment/)
- [Web image format conversion with Canvas, Blob and encoders](https://art.lemonhub.online/zh/blog/web-image-format-conversion/)
- [Image compression quality, formats and dimensions](https://art.lemonhub.online/zh/blog/web-image-compression-quality/)
- [Privacy-first local image processing](https://art.lemonhub.online/zh/blog/privacy-first-local-image-tools/)
- [OpenCV.js inpainting and image repair](https://art.lemonhub.online/zh/blog/opencv-inpainting-image-repair/)
- [Vue 3, Vite and image-tool SEO](https://art.lemonhub.online/zh/blog/vue3-vite-image-tool-seo/)

## Canonical references

- [Technical blog](https://art.lemonhub.online/zh/blog/)
- [Sitemap](https://art.lemonhub.online/sitemap.xml)
- [SEO documentation](https://github.com/LemonHub-org/lemon-art/blob/main/docs/SEO.md)