No signup · Free · Private
Free online tools
20+ free browser tools — calculators, converters, generators, CV builder, QR codes, JSON formatter, and more. No account, no installs, instant results.
OneTools benefits
Open and use — that's it
No registration, no email, no password. Pick a tool, enter your values, get your answer.
No clutter, no distractions
Each tool does one thing and does it well. No extra steps, no upsells, no interruptions.
Your data never leaves your device
No server, no tracking, no logs. What you type stays in your browser — nowhere else.
Featured Tools
Start with the tools that make OneTools especially useful.
Popular This Week
Quick tools for the everyday tasks people return to most.
How it works
Three steps. No friction.
Find your tool
Search or browse 20+ free utilities — calculators, converters, generators, and more.
Enter your values
Everything runs directly in your browser. No backend, no loading screens, no waiting.
Get your result
Copy the output, download a file, or share a link instantly. Done in seconds.
Frequently Asked Questions
Common questions about OneTools.
Are all tools really free?
Yes, every tool is free forever. No signup, no paid plan, no hidden costs. OneTools is ad-supported.
Is my data safe?
Your data never leaves your browser. All calculations and processing happen locally — nothing is sent to any server.
Do I need to create an account?
No account needed. Open any tool and start using it immediately — no email, no password, no registration.
How many tools are available?
20+ tools covering calculators, converters, generators, career tools, developer utilities, and more.
What browsers are supported?
All modern browsers — Chrome, Firefox, Safari, and Edge — on desktop, tablet, or mobile.
Can I use these tools offline?
Most tools run entirely in your browser, but you need an initial connection to load the page.
Ready to get started?
Browse all 20+ tools for free — right now, in your browser, no signup required.