--- title: '6 Best FREE AI Video Upscalers in 2026: 4K Results for $0' source: 'https://youtube.com/watch?v=qlHYgcOini0' video_id: 'qlHYgcOini0' date: 2026-06-15 duration_sec: 0 --- # 6 Best FREE AI Video Upscalers in 2026: 4K Results for $0 > Source: [6 Best FREE AI Video Upscalers in 2026: 4K Results for $0](https://youtube.com/watch?v=qlHYgcOini0) ## Summary The video reviews six genuinely free AI video upscalers that require no sign-ups or hidden fees, demonstrating how to use each tool to enhance low-resolution videos to 2K or 4K. It also shares two bonus FFmpeg-based tools for advanced video processing. ### Key Points - **Free.upscaler.video** [0:19] — Uses web GPU and AI algorithms (Anime4K, Real-ESRGAN) to upscale videos 2x without sign-up. - **Unblur.ai Video Enhancer** [1:17] — Upscales videos up to 500MB to 2K using neural networks, no sign-up required. - **Upscaler.ai** [2:15] — Aggressively removes ISO noise, supports videos up to 30 seconds and 50MB, free download. - **X-Design Enhance Video** [2:58] — Offers 1x, 2K, or 4K upscaling; free 5-second preview download, no sign-in. - **Subtitlevideo.com Video Enhance** [3:47] — Uses deep learning super resolution, up to 4x scaling, requires email sign-up. - **Vid Mage AI Video Upscaler** [4:24] — Daily 20-second free upscaling; trick: use different browsers or VPN to get more credits. - **Bonus Tool 1: FFmpeg-based Online Tool** [5:12] — Traditional matte-based filters, runs in browser using CPU, drag-and-drop interface. - **Bonus Tool 2: FFmpeg Online Command Tool** [6:21] — Allows custom FFmpeg commands for advanced video processing, uses CPU. ### Conclusion These six tools offer genuine free AI upscaling without watermarks or subscriptions, with bonus FFmpeg-based tools for advanced users. The video provides practical demonstrations and a clever trick to extend usage limits. ## Transcript Most so-called free AI upscalers aren't actually free. So, I spent 20 hours digging through the internet to find the six tools that truly work for free. No watermarks, no hidden subscriptions. In this video, I'll show you exactly how to access them and how to use them. And at the end, I'll share two bonus tricks most people don't know. So, the first one is free.upscaler.video and it uses web GPU technologies to access your computer's graphic card. And it utilizes well-known AI upscaling algorithms, specifically anime 4K and real ESR gun for realistic photos and videos. So here is the tool very simple environment. There is no need to sign up or anything. Just choose a video. So I will use this very low resolution video as the low quality. And already you can see what will be the difference. You see on the left side is the previous one and on the right side will be increased resolution. You see the sharpness and the clearness of the video here. It will upscale every video two times. So when I click start upscaling, you'll see something in the performance tab of my computer. You see the GPU. So this is my laptop and it obviously started using GPU. Now we see that fine. And now it is over most likely. Let's see. Here is the final video. We can download it easily. The next one is from unblur.ai and video enhancer. And here you can use longer videos up to 500 megabytes. It uses neural networks to analyze the pixels, then looks for patterns or noise or blur and mathematically guesses what a sharp version would look like. So we can upload the file and it will be enhanced to 2K resolution. Let's use this one here again and you see it is generating. Look at the left one, the original video 480 360. And here we have 2K. You already notice the quality of the right. Let's look at the first one. Okay, very low quality. And then the right one enhanced upscaled. Looks pretty good. Pretty sharp video from the ultra low quality video that we created. Now download for free. And as you noticed, I didn't even sign up or sign in. I don't know the [clears throat] limits, but I generated many different videos and everything is still [music] working. Yes. Then we have the third tool, upscaler.ai, AI video upscaler and it is particularly aggressive by removing the ESO noise. So you know that grainy look you get in videos filmed in the dark. You can upload the videos up to 30 seconds and less than 50 megabytes. So let's do that. This time let's upload this video. So it is generating the scaled version of this video. So here is our video. On the left side you see the low resolution version and here the higher resolution. You see the sharpness and how everything is much more quality on the right side. So if you play nice really good upscaler completely for free just download it and here is our new resolution pretty good then we have X design enhance video for free just upload a video let's use this one and then you have three options 1x 2K or 4K let's use 4K no 2K for example enhance so very quickly here is our enhanced 2K video the thing about this tool is that you can download 5second preview but you can't download the full video but this is very valuable for many short videos or AI generated videos because many of them are 5 seconds or 8 seconds and then you can do multiple times the same thing as you can see completely for free without even signing in. You see the other videos that I did on the left hand side very low SD resolution and here we have 2K that looks actually pretty pretty good. Oh yeah, she is smiling constantly and doing some weird faces, but that's okay. Then we have the tool subtitlevideo.com video enhance and this site uses a deep learning video super resolution algorithm and up to four times scaling. So the tool works like follows. First you need to enter your email address here. Then confirm once you receive the email and after that you will be able to generate videos. So I will enter my address now and I will choose the file. So you have three options. default face enhancer or faster medium resolution. I will use default and it will upscale video four times. After a couple of minutes, I received video in my email. Then just click on the link and you can see that video is upscaled four times. Additionally, we have Vid Mage AI video upscaler and there's a trick about this one. So daily you will receive 20 seconds of video upscaling and enhancing. But the trick is that you can then go to the tool in another browser or join from the VPN and then you'll receive additional 20 seconds which I will show just now. So for example, let's upload the video. The same one let's use four times upscaling. Let's start upscaling. So here is the video. Now you see that I spent all of the credits. I don't have anymore. Now I wouldn't need to sign up. Video quality is pretty good. Yes. And now for the trick, of course. Now I open the same tool in the edge browser and as you can see I have 20 seconds remaining. So you can do that many many times a day and at the end as I mentioned I will reveal two interesting tricks. So unlike the previous tools those two do not use generative AI to hallucinate new pixels. It uses basically traditional matt based filters. So if you use a scale filter here it will make the video bigger and many different things. Completely free. It uses FFmpec technology and it runs in your browser based on your CPU. So for example, here we have one video and here you have many different things for this specific video that you can just add here. So for example, scale addit. It's like this drag and drop map. Here we can increase the video size and the resolution. And we have many different other things. Color, chroma key. Okay. Similarity blend color contrast. You can do whatever you want with this tool and it is completely free. After you're done with your many different settings, just render preview. It is rendering. It is now using my CPU to do that. And here is our new video. >> It's Pepe has become kind of a simple [laughter] >> nice one. After that, just click download. Then the second tool is based on the same technology. So FFmpeg online. Upload your file. Here it is. and then set different options. Here you configure options by setting commands which there are hundreds of. So for example, if you would like to make the color pop and increase the resolution of the video and then put them side by side, this is the command. It's a pretty complicated one. As you can see, many different things using the lens algorithm and the scaling and changing the saturations and everything. Fine. Then just click run. Now it uses my CPU to process all of that. As you can see, the CPU is going to 100% almost. So, video has been created. Let's download the file. So, you notice it created two different versions. So, this is the previous one and this is the second one where we made the colors different and perhaps more pop. All of that created with FFmpeg command. Pretty good actually. For example, if you go to this frame, you can see that colors in this video are much more pronounced. Now, you could play with that and enter hundreds of different commands to enhance your video. Just ask jp or gemini how to use ffmpec options and it will split out whatever you need. For example, you say I would like to saturate this video and make it bigger resolution or anything else and it's a split out command that you can just paste here and run it. Pretty good. So yeah, pretty useful tools that you can use on dayto-day basis. I hope you found this useful and if you did, please do like and subscribe and we'll talk some next time. Bye-bye.