01
Video Compressor
Shrinks a video so it fits an email or a WhatsApp limit, re-encoding with H.264 in your…
Video Resizer
Scales a video to 480p, 720p, 1080p or any height you choose, keeping the aspect ratio exactly.
Video & Audio
Nothing uploaded
No sign-up
Free, unlimited
Drop a video herewidth is calculated to keep the ratio
Add a file to begin.
In short
Video Resizer is a free online tool on inputtesthub.com that scales a video to 480p, 720p, 1080p or any height you choose, keeping the aspect ratio exactly. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the Video Resizer
- Add your PDF file or files by dropping them in.
- Arrange or configure them as needed.
- Download the finished PDF. Processing happens on your own device.
About the Video Resizer
The Video Resizer scales a video to 480p, 720p, 1080p or any height you choose, keeping the aspect ratio exactly. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Getting a 4K phone video down to something you can actually share.
- Matching a platform requirement.
- Cutting file size where full resolution is wasted.
The first tool you run downloads the 31 MB WebAssembly engine once; after that it starts instantly. Processing speed depends on your own machine — a browser build is several times slower than desktop FFmpeg, so a long 4K file will take a while. The trade is that nothing is uploaded and nothing is queued behind other people.
Frequently asked questions
Will scaling down lose quality?
You lose resolution, obviously, but on a phone screen 1080p and 4K are almost indistinguishable while the file is a fraction of the size. Scaling up does not add detail and is rarely worth doing.
Is my video uploaded to a server?
No. FFmpeg is compiled to WebAssembly and runs inside this browser tab, on your own processor. You can watch the Network tab while it works — no request carries your file. That is also why there is no queue, no size cap set by us and no watermark.
Why is the first run slow to start?
It downloads the 31 MB engine once. Your browser caches it, so every later run on this site starts immediately. The processing itself is unaffected.
How big a file can I use?
There is no limit we impose — the ceiling is how much memory your browser will hand the tab, typically 2–4 GB on desktop and much less on a phone. If a very large file fails, try trimming it first or use a lower output resolution.
Why is it slower than a desktop program?
WebAssembly runs at roughly half to a third of native speed, and this build is single-threaded because the multi-threaded one needs security headers that would break other parts of the site. For a short clip the difference is seconds; for a feature-length 4K file, use a desktop tool.
Do I need an account to use the Video Resizer?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the utility.
Can you see what I put into this utility?
No. The Video Resizer runs entirely in your browser using JavaScript. Your input never reaches inputtesthub.com or any third party — open your browser's Network tab while you use it and you will see no request go out.
Who is the Video Resizer for?
In practice it gets used for three things: getting a 4K phone video down to something you can actually share. Matching a platform requirement. Cutting file size where full resolution is wasted. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
What do people usually get wrong here?
The first tool you run downloads the 31 MB WebAssembly engine once; after that it starts instantly. Processing speed depends on your own machine — a browser build is several times slower than desktop FFmpeg, so a long 4K file will take a while. The trade is that nothing is uploaded and nothing is queued behind other people.
Is there a file size limit?
There is no limit set by us, because your file is never uploaded — the only ceiling is the memory your own browser will give the tab. Very large files simply take longer to process, and a phone will give up sooner than a desktop.
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