Free tools for files, downloads, and data.
Downloaderi is a set of free calculators plus a TikTok video downloader. Pick a tool, get a fast and accurate number, or paste a link to save a video. Nothing to install, no account to create.
What is Downloaderi?
Downloaderi gives you fifteen calculators for the everyday math around files, downloads, and data. They fall into three groups: speed and time, storage and size, and video and file tools.
That means download time, upload time, bandwidth, file size, storage conversions, bitrate, resolution, and more. Each one shows a clear result as you type. You can browse them all on the calculators page.
The site also keeps a TikTok video downloader. Paste a public TikTok link and save it as MP4 video or MP3 audio. It is the one tool here that needs an outside service, and we explain that below.
Downloaderi was created to make common file, download, and storage calculations simple, while also providing an easy way to save public TikTok videos.
Who Uses Downloaderi?
Anyone who needs a quick, correct number. People reach for these tools at work, at school, and at home.
- Anyone planning a download: Checking how long a file will take on their connection before they start.
- People managing storage: Converting between MB, GB, and TB, or working out if files fit on a drive.
- Video creators: Estimating a video size from its bitrate, or finding a bitrate that fits a size limit.
- Students and teachers: Working through speed, size, and unit problems with a clear result.
- TikTok users: Saving a public video as MP4 or pulling the audio as MP3.
What We Stand For
Instant
Every calculator updates as you type. No button to press, no waiting.
Accurate
Decimal units by default, with bits and bytes handled the right way. Each calculator is checked against known values before it goes live, helping ensure the results are accurate.
Private
The calculators run in your browser. Your numbers never leave your device.
Free
No account, no email, no limits. Works on a phone, tablet, or computer.
How It Works
The calculators run entirely in your browser. When you type a number, the math happens on your device. Nothing you enter is sent to us or stored anywhere.
The TikTok downloader works differently. When you paste a link, that link goes to a third-party processing service that fetches the video. The file is streamed to your device in real time. We do not store the link or the file.
Everything runs in any modern browser on a phone, tablet, or computer. There is no app to install and no permission to grant.
Ready to try it?
Pick a calculator, or paste a TikTok link on the homepage. Free, always.