Perimeter Formulas Ref
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100 calls/day, no card, no spam. Built by one person, in public.
About Perimeter
Perimeter was built for the moment you just need to handle this task and move on — no signup, no upload to a third-party server. 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. It pairs naturally with the other utility utilities here when you need to chain a quick workflow.
When you'd reach for Perimeter
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 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 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 Perimeter
- Does Perimeter work on mobile?
- Yes, Perimeter is fully responsive and tested on iOS Safari and Android Chrome.
- Do I need to create an account to use Perimeter?
- No. Perimeter works without any signup. We only ask for an email if you decide to subscribe to a paid plan.
- Can I use Perimeter commercially?
- Yes. The output of Perimeter belongs entirely to you, with no licensing restrictions.
- Are my files uploaded to a server when I use Perimeter?
- Perimeter processes everything in your browser using local APIs. Your files never leave your device.
- Will Perimeter change my original file?
- Never. Perimeter only reads your input file and produces a new output file.
