[{"data":1,"prerenderedAt":361},["ShallowReactive",2],{"blog-post-upscale-video-online-without-uploading":3},{"id":4,"title":5,"body":6,"date":344,"description":345,"draft":346,"extension":347,"image":348,"imageAlt":30,"lang":349,"meta":350,"navigation":351,"path":352,"seo":353,"stem":354,"tags":355,"__hash__":360},"blog\u002Fblog\u002Fupscale-video-online-without-uploading.md","How to Upscale a Video Online Without Uploading It",{"type":7,"value":8,"toc":326},"minimark",[9,13,22,25,32,37,40,79,82,85,89,92,95,101,104,108,111,117,121,124,127,130,133,136,139,142,145,148,152,155,158,161,165,168,174,195,198,201,204,221,224,228,236,239,242,246,249,252,255,259,262,284,287,291,294,297,317,320],[10,11,12],"p",{},"Most online video upscalers send your file to a remote server. That can be\nconvenient, but it also means waiting for an upload, trusting another service\nwith the file, and downloading the result when processing finishes.",[10,14,15,16,21],{},"Modern browsers provide another option. With GPU APIs, video codecs, workers,\nand locally loaded model weights, a video can be decoded, enhanced, encoded,\nand downloaded on the same device. The\n",[17,18,20],"a",{"href":19},"\u002Fupscaler\u002F","ArtPlayer AI Video Upscaler"," follows that approach: the selected\nvideo stays in the browser and is not uploaded to an ArtPlayer server.",[10,23,24],{},"This guide explains how to use it, what its three quality modes do, and why\nbrowser-based video upscaling sometimes needs to reduce quality or output size.",[10,26,27],{},[28,29],"img",{"alt":30,"src":31},"A video frame passing through a private GPU pipeline inside a browser","\u002Fassets\u002Fblog\u002Fupscale-video-online-without-uploading\u002Fcover.webp",[33,34,36],"h2",{"id":35},"how-to-upscale-a-video-in-your-browser","How to upscale a video in your browser",[10,38,39],{},"The basic workflow is short:",[41,42,43,51,54,70,73,76],"ol",{},[44,45,46,47,50],"li",{},"Open the ",[17,48,49],{"href":19},"AI Video Upscaler"," in a current desktop browser.",[44,52,53],{},"Choose a video file or load the sample clip.",[44,55,56,57,61,62,65,66,69],{},"Select ",[58,59,60],"strong",{},"Fast",", ",[58,63,64],{},"Balanced",", or ",[58,67,68],{},"Quality",".",[44,71,72],{},"Start the upscaling process and keep the tab open while it runs.",[44,74,75],{},"Compare the original and enhanced previews.",[44,77,78],{},"Download the resulting MP4.",[10,80,81],{},"Start with a short clip if you are testing the tool for the first time. Video\nupscaling processes every decoded frame, so duration, frame size, frame rate,\nand the selected model all affect processing time and memory use.",[10,83,84],{},"The tool inspects the video before processing begins. It checks whether the\nbrowser can decode the input, whether it can encode the planned MP4 output, and\nwhether the estimated model and output buffers fit within a bounded memory\nbudget. These checks are designed to stop an unsuitable workload before it\ncauses a frozen tab or a failed export.",[33,86,88],{"id":87},"what-happens-to-the-video-file","What happens to the video file?",[10,90,91],{},"Selecting a file gives the page permission to read that file inside the current\nbrowser session. ArtPlayer uses browser media APIs to inspect and decode the\nvideo, then sends frames to a dedicated browser worker for enhancement. Model\nweights are downloaded as static assets, but the selected video itself does not\nneed to be sent to a processing API.",[10,93,94],{},"After the frames have been enhanced, the browser encodes them and creates a new\nMP4 in memory. The download button saves that result to your device. Temporary\nobject URLs and processing resources are released when the result is replaced,\nthe tool is reset, or the page is closed.",[10,96,97],{},[28,98],{"alt":99,"src":100},"Browser-local video upscaling pipeline from the selected file to the MP4 download","\u002Fassets\u002Fblog\u002Fupscale-video-online-without-uploading\u002Flocal-processing-pipeline.webp",[10,102,103],{},"Local processing improves privacy, but it moves the compute and memory cost to\nyour device. A powerful desktop GPU can process workloads that may be too large\nfor a phone, an older laptop, or a browser with limited codec support.",[33,105,107],{"id":106},"fast-balanced-or-quality","Fast, Balanced, or Quality?",[10,109,110],{},"All three modes target a larger, enhanced output, but they use different model\nand GPU paths.",[10,112,113],{},[28,114],{"alt":115,"src":116},"Comparison of the Fast, Balanced, and Quality video upscaling modes","\u002Fassets\u002Fblog\u002Fupscale-video-online-without-uploading\u002Fquality-modes.webp",[118,119,60],"h3",{"id":120},"fast",[10,122,123],{},"Fast uses the smallest model and has the lowest estimated memory cost. It can\nrun through the supported WebGL or WebGPU path and is the best first choice for\nlonger clips, lower-memory devices, or a quick compatibility test.",[10,125,126],{},"Use Fast when completing the job reliably matters more than extracting the\nmaximum visible improvement from every frame.",[118,128,64],{"id":129},"balanced",[10,131,132],{},"Balanced uses a larger model through the WebGL renderer. It is intended as the\nmiddle ground between processing cost and enhancement strength.",[10,134,135],{},"Use Balanced on a modern desktop when Fast works correctly and you want to\ncompare a stronger result without requiring the Quality mode's WebGPU path.",[118,137,68],{"id":138},"quality",[10,140,141],{},"Quality uses the largest of the three current models and a source-owned WebGPU\nrenderer. It needs WebGPU support and has the highest estimated GPU memory cost.",[10,143,144],{},"If WebGPU is unavailable or the workload exceeds the bounded memory policy, the\ntool may fall back to Balanced or Fast and display a warning. This is an\nintentional reliability measure, not a promise that every device can run the\nlargest model.",[10,146,147],{},"For an unfamiliar device, begin with Fast, confirm that the preview and MP4\nexport work, and then compare the other modes with the same short source clip.",[33,149,151],{"id":150},"what-does-2x-video-upscaling-mean","What does 2x video upscaling mean?",[10,153,154],{},"A 2x spatial scale normally means doubling both width and height. A 640 × 360\nsource would therefore target 1280 × 720, while 1280 × 720 would target\n2560 × 1440. Doubling both dimensions produces four times as many output\npixels per frame.",[10,156,157],{},"The browser may select a smaller scale when the full 2x dimensions cannot be\nencoded reliably on the current device. The available planning steps include\n2x, 1.75x, 1.5x, 1.25x, and the original frame size. When this happens, the\nresult remains an enhanced export, but the interface reports that the output\nresolution was reduced.",[10,159,160],{},"Upscaling can make edges look cleaner and improve the presentation of\nlow-resolution animation, screen recordings, and compressed footage. It cannot\nrecover an exact face, texture, or written character that was never captured in\nthe source. Treat the result as a model-assisted reconstruction, not as proof\nof missing real-world detail.",[33,162,164],{"id":163},"why-video-upscaling-uses-so-much-memory","Why video upscaling uses so much memory",[10,166,167],{},"Browser video upscaling combines several demanding operations:",[10,169,170],{},[28,171],{"alt":172,"src":173},"Preflight inputs and the safe workload outcomes selected by the browser","\u002Fassets\u002Fblog\u002Fupscale-video-online-without-uploading\u002Fworkload-decisions.webp",[175,176,177,180,183,186,189,192],"ul",{},[44,178,179],{},"decoding the source video;",[44,181,182],{},"transferring and processing frames in a worker;",[44,184,185],{},"running a GPU model at the output resolution;",[44,187,188],{},"encoding the enhanced frames;",[44,190,191],{},"preserving audio when the browser can process it; and",[44,193,194],{},"building the downloadable MP4 in memory.",[10,196,197],{},"Resolution has a particularly large effect. A full 2x output contains four\ntimes the source pixel count, and a larger model needs additional intermediate\nGPU buffers. Duration also matters because the completed MP4 is assembled in\nmemory before download.",[10,199,200],{},"ArtPlayer estimates both the model workload and the likely output size before\nprocessing. On constrained devices it can reduce the model level, cap the\nplanned output resolution, or reject a workload that is unlikely to complete.",[10,202,203],{},"If you encounter a resource-limit message, try these changes in order:",[41,205,206,209,212,215,218],{},[44,207,208],{},"Trim the source to the section you actually need.",[44,210,211],{},"Choose Fast instead of Quality or Balanced.",[44,213,214],{},"Start with a lower-resolution source.",[44,216,217],{},"Close other GPU-heavy tabs and applications.",[44,219,220],{},"Use a current desktop version of Chrome or Edge.",[10,222,223],{},"Reducing a clip's duration is often more useful than repeatedly retrying the\nsame workload because it also reduces the in-memory output size.",[33,225,227],{"id":226},"codec-and-container-compatibility","Codec and container compatibility",[10,229,230,231,235],{},"A filename such as ",[232,233,234],"code",{},".mp4"," identifies a container, not the exact video codec\ninside it. Two MP4 files can behave differently when one contains a video track\nthe browser can decode and the other does not.",[10,237,238],{},"The upscaler checks the primary video track with browser decoding capabilities\nbefore starting the model. It separately checks whether the browser can encode\nan AVC MP4 at the planned output dimensions. A file can therefore be playable\nin a desktop application but still be unsuitable for a browser-based export.",[10,240,241],{},"For the most predictable workflow, use a conventional MP4 with a video codec\nsupported by your browser. If inspection or decoding fails, convert the source\nto a browser-friendly MP4 first, then retry with a short segment. If encoding\nfails only at a large output size, allow the tool to choose a smaller output or\nstart from a lower-resolution source.",[33,243,245],{"id":244},"webgpu-and-webgl-are-not-the-same-thing","WebGPU and WebGL are not the same thing",[10,247,248],{},"WebGL is widely available and provides the rendering path used by the Fast and\nBalanced profiles. WebGPU is a newer GPU API with a compute model better suited\nto the largest current Quality profile, but availability still depends on the\nbrowser, operating system, GPU, and driver.",[10,250,251],{},"Seeing a WebGPU option in a browser does not guarantee that every video and\nmodel will fit in GPU memory. ArtPlayer also applies its own bounded workload\npolicy so that a technically available backend is not treated as unlimited.",[10,253,254],{},"Safari and mobile browsers can have different decoding, encoding, memory, and\nGPU behavior from desktop Chromium. If a workflow is important, validate the\ncomplete process on the target browser: select the file, finish processing,\nplay the result, seek through it, confirm audio, and download the MP4.",[33,256,258],{"id":257},"when-to-use-a-different-upscaler","When to use a different upscaler",[10,260,261],{},"Choose the tool that matches the source media:",[175,263,264,270,277],{},[44,265,266,267,269],{},"Use the ",[17,268,49],{"href":19}," for ordinary video files and MP4\noutput.",[44,271,266,272,276],{},[17,273,275],{"href":274},"\u002Fimage-upscaler\u002F","AI Image Upscaler"," for a single JPG, PNG, or WebP\nimage.",[44,278,266,279,283],{},[17,280,282],{"href":281},"\u002Fgif-upscaler\u002F","GIF Upscaler"," when animated GIF timing and GIF output\nneed to be preserved.",[10,285,286],{},"Converting a still image into a video just to upscale it adds unnecessary work,\nwhile treating an animated GIF as a single image loses its animation.",[33,288,290],{"id":289},"a-practical-way-to-evaluate-the-result","A practical way to evaluate the result",[10,292,293],{},"Use the same short source when comparing quality modes. Look at fine lines,\ntext edges, animation contours, compression blocks, and motion between frames.\nDo not judge only from a paused frame at a different display size.",[10,295,296],{},"Then verify the exported file rather than relying on the preview alone:",[175,298,299,302,305,308,311,314],{},[44,300,301],{},"confirm its dimensions and duration;",[44,303,304],{},"play it from beginning to end;",[44,306,307],{},"seek to several positions;",[44,309,310],{},"check that motion remains stable;",[44,312,313],{},"listen for synchronized audio; and",[44,315,316],{},"confirm that the downloaded MP4 opens in the target player.",[10,318,319],{},"This separates a successful model preview from a genuinely usable export.",[10,321,322,323,325],{},"Browser-local upscaling will not replace every desktop or server workflow, but\nit is a useful option for private clips, quick experiments, and devices that can\nsupport the workload. Start with a short video and the Fast profile, then use\nthe ",[17,324,20],{"href":19}," to find the best balance for your\nbrowser and device.",{"title":327,"searchDepth":328,"depth":328,"links":329},"",2,[330,331,332,338,339,340,341,342,343],{"id":35,"depth":328,"text":36},{"id":87,"depth":328,"text":88},{"id":106,"depth":328,"text":107,"children":333},[334,336,337],{"id":120,"depth":335,"text":60},3,{"id":129,"depth":335,"text":64},{"id":138,"depth":335,"text":68},{"id":150,"depth":328,"text":151},{"id":163,"depth":328,"text":164},{"id":226,"depth":328,"text":227},{"id":244,"depth":328,"text":245},{"id":257,"depth":328,"text":258},{"id":289,"depth":328,"text":290},"2026-08-08","Learn how to upscale a video privately in your browser, choose the right quality mode, and handle WebGPU, codec, memory, and output-size limits.",false,"md","\u002Fassets\u002Fblog\u002Fupscale-video-online-without-uploading\u002Fog.webp","en",{},true,"\u002Fblog\u002Fupscale-video-online-without-uploading",{"title":5,"description":345},"blog\u002Fupscale-video-online-without-uploading",[356,357,358,359],"guide","video","webgpu","privacy","v_SGyqkwv6u1I_logaJ86qgXspfzFgczD_BRa8Au30Q",1787284600793]