Free Online Tools — One Tab, Every Tool You Need
Quick online tools for developers, designers, and everyday tasks. Free to use, no sign-up, and nothing you do leaves your browser.
From open tab to done
Three steps, no sign-up, no install.
Find your tool
Search by name or browse 85 categories. Whatever you came for is a click or two away.
Get to work
Tools run right in the page. No account to set up, no waiting on a server.
Close the tab
Your work stays on your device the whole time. When you're done, nothing's saved and nothing follows you.
Tools for every workflow
The eight busiest categories, with hundreds of tools inside.
Unit Converters
Convert length, weight, temperature, and other units.
Engineering Tools
Structural, mechanical, and construction calculators.
Health & Fitness
BMI, calorie, and fitness calculators.
Developer Tools
Format, minify, and debug code and APIs.
Date & Time
Calculate durations, convert time zones, and more.
Chemistry Tools
Molecular biology, biochemistry, and chemistry calculators.
Math Calculators
Geometry, algebra, and advanced math calculators.
Finance Tools
Currency conversions, budgeting, and financial math.
Popular today
The tools people open again and again.
Discover the best AI tools
Independently reviewed AI tools — features, pricing, and honest comparisons across every category.
Explore AI Tools
Built for the open web
No corporate accounts, no data harvesting, no upsells.
100% Free
No hidden fees, no paywalls, no freemium tiers.
Most run in your browser
Most processing happens on your device. Tools needing live data or a network service disclose it on the page.
No account needed
No sign-up and no email to confirm. Open a tool and start using it.
Privacy-first
Most tools process input locally. Network-enabled tools should explain what they send.
What is Top10k Tools?
Top10k Tools is a free collection of 8,456+ online utilities, most of which process input in your browser.
Converters, calculators, generators, and developer tools — no account or installs. Tools that need live data or another network service should disclose it on the page. Pick a tool, get your result, and close the tab. New tools are added regularly.
Frequently asked questions
What is Top10k Tools?
Top10k Tools is a free collection of 8,456+ online converters, calculators, generators, and developer utilities. No account or installation is required.
Are the tools really free?
Yes. Every tool on Top10k Tools is 100% free, with no account, payment, or freemium tier.
Do I need to sign up?
No. There is no sign-up and no email to confirm — open any tool and start using it.
How do tools handle my data?
Most tools process input locally in your browser. A tool that needs live data or another network service should explain that behavior on its page; check before entering sensitive data.
How many tools are there?
Top10k Tools has 8,456+ tools across 85 categories, and new tools are added regularly.
Can I request a tool?
Yes. If a tool you need is not here yet, request it on the Request a Tool page — many requests go live within a day, and every tool stays free.