Free Upscaler is a free AI image and video upscaling tool that mainly runs locally on the device through the browser. According to the official introduction, it can upscale photos and videos by 2x or 4x, without uploading files, without registering an account, and without adding watermarks, and it emphasizes 100% privacy protection.
Uses This tool is aimed at scenarios that require improving image or video resolution, such as upscaling low-resolution source files, old photos, product images, screenshots, AI-generated images, as well as social clips, screen recordings, game footage, and AI-generated videos. The official description says it is suitable for designers, photographers, e-commerce sellers, content creators, AI art creators, and users processing old family photos.
Main capabilities Image upscaling: Supports JPG, PNG, and WebP files, with a size limit of 20 MB. The AI adds realistic details, such as sharper edges, cleaner lines, and more natural textures, rather than simply stretching pixels. The output is a clean, watermark-free PNG. Video upscaling: Supports MP4, WebM, and MOV files, with a size limit of 150 MB. Each frame is decoded, enhanced, and re-encoded on the device. The output is a clean, watermark-free H.264 MP4 with audio preserved. Local operation: The AI runs locally in the browser through WebGPU, and files are not sent to official servers or other servers. No account and no watermark: No registration, no queue, no bank card binding, and the output has no watermark. Reusable cache: The browser can reuse cached applications and AI resources, so repeat visits usually start faster, and processing is still completed locally.
How to use It is officially described in three steps: first, upload a file by dragging and dropping or clicking to select a file; the file always remains on the device and is not sent to a server; second, the AI processes locally, with advanced AI running directly on the device; third, download the processed result when finished, with no watermark, no registration, and no usage quota limits. Users can choose 2x or 4x upscaling.
Applicable scenarios Officially listed users include: designers extracting details from low-resolution source files; photographers upscaling archival scans for printing; e-commerce sellers repairing overly small images provided by suppliers; creators cleaning up compressed social clips; AI artists pushing Midjourney, Stable Diffusion, Sora, and Kling outputs above the generators' native resolution; and ordinary users processing large numbers of old family photos.
Limitations In terms of file size, the image limit is 20 MB and the video limit is 150 MB. Formatsin terms of formats, images support JPG, PNG, and WebP, and videos support MP4, WebM, and MOV. Processing depends on local device hardware and browser WebGPU support, so actual speed is related to device performance. Other questions about browser compatibility, specific differences from Topaz, Upscale.media, and Canva, and commercial use licensing are listed in FAQ form on the official page, but the materials do not currently provide specific answers.
