Lumli
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Process Images Up to 10x Faster
Experience professional grade image processing powered by browser native WebAssembly. Lumli unlocks multi-threading to leverage your device's full CPU cores, delivering lightning fast smart resizing, compression, upscaling and background removal instantly.
Your Images Never Leave Your Device
Your privacy is our utmost priority. Unlike traditional online converters, Lumli runs entirely sandbox-secured inside your local browser storage. Your media files are processed locally and never touch an external server or cloud database.
Convert HEIC, PNG, JPG & More
Easily switch extensions between Apple's HEIC, WebP, PNG, JPEG, and SVG layouts without losing original pixel density. Our precise engine preserves transparent alpha channels, rendering perfectly crisp assets optimized for modern web architectures.
Frequently Asked Questions
Everything you need to know about Lumli web tools.
Can I use Lumli offline without an internet connection?
Yes, absolutely! Lumli is built as a Progressive Web App (PWA). Once you visit the site for the first time, you can install it on your device and use all core features like resizing, compressing, converting, and upscaling completely offline without any internet connection.
How do I install Lumli on my desktop or mobile phone?
It takes just one click! On desktop (Chrome/Edge), simply click the Install App button in the top navigation bar. On mobile devices, tap the Install App button in the menu or look for the Add to Home Screen prompt to install Lumli as a native-like app on your device
Does the Background Remover work offline too?
Yes, but it requires a brief internet connection on its very first run to download the local AI/WASM processing models directly into your browser's secure cache. After this initial setup, you can remove backgrounds 100% offline.
Can I upload and process Apple HEIC images?
Yes! Lumli fully supports Apple's HEIC format across all toolsets. You can upload HEIC images straight from your iPhone or Mac to seamlessly convert them to JPG, PNG, WebP, or vector SVG layouts. You can also resize, compress, or remove backgrounds locally without pre-converting.
Does the image resizer have custom presets for social media?
Absolutely. Our advanced Image Resizer comes equipped with smart canvas presets optimized for Instagram posts and stories, YouTube thumbnails, and Twitter/X layouts. It handles aspect-ratio fitting and smart cropping automatically to avoid stretched pixels.
How does the browser based background remover work?
Lumli uses advanced browser side intelligence to isolate main subjects and remove backgrounds instantly. Since it runs completely inside your web browser via WebAssembly, it is fast, free, and guarantees absolute privacy.
How does Lumli UltraScale increase image resolution up to 4x without cloud servers?
Lumli UltraScale runs entirely inside your browser using advanced mathematical scaling matrices and instant hardware-accelerated GPU rendering. By using dynamic edge contrast reconstruction, the tool sharpens blurred borders and recovers lost pixel details locally on your device's hardware, guaranteeing 100% private client inference and crystal clear results.
Will my photos lose clarity during compression?
No. Our modern image compression algorithms intelligently balance file size reduction with high-resolution clarity, giving you perfect web-optimized results without visible pixel degradation.
Is there a file size limit for uploading images?
No, there is no strict file size limit imposed by a server. Since Lumli processes everything locally using your device's hardware, you can handle large, high-resolution images. The performance depends entirely on your device's CPU.
What image formats are supported?
We support all modern web extensions including HEIC, WebP, PNG, JPEG, and SVG layouts. You can seamlessly convert between these formats while fully preserving transparent alpha channels and original pixel density.
How long does it take to create a custom QR code with my logo?
Creating a custom QR code with your logo takes less than five seconds. Lumli’s QR Code Generator lets you create dynamic QR codes, customize colors and shapes, add a logo, and preview every change instantly. Once you’re happy with the result, Download your QR code in PNG, JPEG, or SVG format for websites, business cards, packaging, marketing materials, and professional printing. All QR codes are optimized for fast and reliable scanning across modern devices.
Why is Lumli completely free to use?
Since all image processing happens locally via WebAssembly, we don't operate expensive cloud servers. This keeps our tools 100% free and private forever. If Lumli makes your workflow effortless, feel free to fuel our code by buying us a coffee!