Free Tools That Just Work — SEO, finance & dev tools. No signup needed.

About ToolMixr

Free online tools that respect your privacy.

About the Author

Lao Lu

Lao Lu (Lu Shen) — indie developer and small business owner. I build every tool on this site and test it myself before it ships.

I also run GenAIPick (honest AI tool reviews) and lusdaily.com (my Chinese-language blog about building websites and making money online from zero).

Read the full story · LinkedIn · GitHub

What is ToolMixr?

ToolMixr is a collection of free online tools built for developers, designers, SEO specialists, and content creators. Every tool runs entirely in your browser — no data is ever sent to a server, no sign-up required, no tracking.

Why ToolMixr?

We got tired of online tools that:

  • Force you to create an account just to format some JSON
  • Upload your data to unknown servers for "processing"
  • Bombard you with pop-ups, ads, and paywalls
  • Break your workflow with slow, bloated interfaces

ToolMixr is our answer: fast, clean, private. That's it.

Who Built This?

Hi, I'm Lu Shen. I build web tools for a living — and I got frustrated enough with the existing options that I decided to build my own.

Before ToolMixr, I was that person with 15 browser tabs open, each running a different "free" tool that required an account, uploaded my data to some server I'd never heard of, or hit me with a paywall after two uses. So I built what I wanted: tools that just work, right in your browser, no strings attached.

I test every tool myself before publishing it. If a calculator gives me a wrong answer or a generator produces broken output, it doesn't ship. Period.

When I'm not building tools, I'm probably testing other people's AI tools over on GenAIPick, where I write honest reviews of AI products I actually pay for.

How Every Tool Is Tested

Nothing ships until I have used it in real work. My testing checklist for every tool:

  • Core function works correctly against known inputs and edge cases
  • Results are cross-checked against trusted sources (formulas, standards, reference tools)
  • Works in current Chrome, Edge, Firefox, and Safari on desktop and mobile
  • No data leaves the browser, even by accident

Found a bug anyway? Report it and I will fix it — that is the point of running a small, accountable site.

Our Principles

🔒

Privacy First

All processing happens locally in your browser. Your data never leaves your device.

⚡

Instant & Free

No sign-up, no limits, no paywalls. Just open and use.

🎯

Does One Thing Well

Each tool is focused on a single task. No feature creep, no confusion.

🌐

Works Everywhere

Desktop, tablet, mobile — all you need is a modern browser.

Available Tools

🔍 SEO Tools

💻 Developer Tools

💰 Finance Tools

🛠️ Utilities

🎨 Design Tools

Frequently Asked Questions

Are the tools really free?

Yes. Every tool on ToolMixr is free, with no sign-up, no limits, and no paywalls. Some pages include affiliate links to services we genuinely recommend — they cost you nothing and help keep the site running.

Is my data safe?

All tools run 100% in your browser. Images, text, and numbers you process never leave your device.

How do I know the tools are accurate?

Every tool is tested before publishing, with edge cases checked against trusted sources. Found a bug? Report it and it gets fixed fast.

Can I request a new tool?

Yes. Tell me what you need via the contact page and I will evaluate it.

Contact

Have questions, feedback, or feature requests? Reach me directly: