Sample Size Calc
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100 calls/day, no card, no spam. Built by one person, in public.
About Sample Size
When you need this task done in seconds, Sample Size delivers a clean, focused interface without the friction of a generic tool. 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 Sample Size
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.
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.
Frequently asked about Sample Size
- What browsers does Sample Size support?
- Every modern browser released in the last three years: Chrome, Firefox, Safari, Edge, Brave, Opera.
- Can I use Sample Size commercially?
- Yes. The output of Sample Size belongs entirely to you, with no licensing restrictions.
- Is Sample Size really free?
- Yes — Sample Size is free for unlimited personal use, with no account required and no watermark on the output.
- Are my files uploaded to a server when I use Sample Size?
- Sample Size processes everything in your browser using local APIs. Your files never leave your device.
- Do I need to create an account to use Sample Size?
- No. Sample Size works without any signup. We only ask for an email if you decide to subscribe to a paid plan.