Knot Speed Calc
Get a free API key + new tools as they ship
100 calls/day, no card, no spam. Built by one person, in public.
About Knot Speed
Knot Speed solves a specific problem that comes up daily for anyone dealing with this task: doing it once, fast, without an account. Processing runs locally in your browser using modern Web APIs. Nothing is uploaded, nothing is logged, and there is no quota to worry about for casual use. Like everything else in the utility collection, it is free, ad-light, and works on mobile as well as desktop.
When you'd reach for Knot Speed
You need to handle a one-off task right before a meeting and don't have time to install anything.
Anyone working remotely on a borrowed or restricted machine.
Open the page, get the result, paste it into your doc — under a minute.
You're on a public or shared machine and don't want to leave traces of what you're working on.
Travelers, contractors, anyone working from a friend's computer.
Nothing is uploaded, nothing persists if you're not signed in.
You're hitting the daily limit of a paid SaaS and need a backup option for a single quick job.
Marketers and ops people whose primary tool is metered.
Stay productive without burning credits.
You're cleaning up a folder of files that accumulated over a project and need to standardize them.
Designers, writers, and developers wrapping up deliverables.
Drop each file in, copy the output, move on.
Frequently asked about Knot Speed
- Can I use Knot Speed commercially?
- Yes. The output of Knot Speed belongs entirely to you, with no licensing restrictions.
- What browsers does Knot Speed support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
- Are my files uploaded to a server when I use Knot Speed?
- Knot Speed processes everything in your browser using local APIs. Your files never leave your device.
- Does Knot Speed work on mobile?
- Yes, Knot Speed is fully responsive and tested on iOS Safari and Android Chrome.
- Is Knot Speed really free?
- Yes — Knot Speed is free for unlimited personal use, with no account required and no watermark on the output.