Small tools that just work.
A growing collection of fast, free utilities for freelancers, small businesses and everyday tasks. Everything runs right in your browser.
Browse all tools
In and out in seconds
Pick a tool
Browse the collection or search by name. Every tool is free and open — no account, no paywall.
Enter your data
Fill in your numbers, text or settings. Everything processes instantly in your browser — nothing is sent to a server.
Get your result
Copy, download or use the output directly. Done. No steps, no friction, no follow-up emails.
Frequently asked questions
Why Cloistr?
Most free tool sites bury the actual tool behind a sign-up wall, an ad-heavy layout, or a "free trial" that isn't really free. Cloistr doesn't do any of that — every tool is genuinely free, works instantly with no account, and runs entirely in your browser so nothing you enter is ever sent anywhere.
Are all tools really free?
Yes. Every tool on Cloistr is completely free to use. No premium tier, no credit card, no trial period.
Do I need to create an account?
No account, no registration, no email address. Just open a tool and use it.
Is my data safe?
All calculations happen directly in your browser. Your data is never sent to our servers.
Can I use these tools for commercial purposes?
Absolutely. Cloistr is designed for freelancers and small businesses. Use it for any purpose.
How often are new tools added?
New tools are added regularly, focused on what freelancers and small businesses actually need.
How can I suggest a new tool?
Email us at contact@cloistr.io. We read every suggestion.