About Freemaki
Free, fast, privacy-friendly online tools for everyone.
Freemaki is a free collection of online tools designed for developers, designers, and everyday users. Our goal is simple: provide useful utilities that work instantly in your browser — no signup, no server processing, no data collection.
About the Author
M
McDon (尧晨)
Software Developer & Tool Builder
Hi, I'm McDon — a software developer based in Shanghai, China, working in logistics technology and supply chain systems. I build Freemaki in my spare time because I got tired of bloated, ad-heavy, and privacy-invasive online tools. Every tool here is something I personally use and care about.
I have years of experience in full-stack development, working with Python, Java, JavaScript, and various enterprise systems. When I'm not coding tools for this site, I'm probably optimizing TMS workflows, automating SAP processes, or playing snooker.
Email: yc.mcdon@gmail.com · GitHub: @omcdon
Our Mission
We believe that online tools should be accessible, fast, and respectful of your privacy. Every tool on Freemaki processes data entirely in your browser. Your text, files, and calculations never leave your device.
What We Stand For
🔒
Privacy First
All processing is local. Your data stays in your browser.
⚡
Instant & Fast
No server round-trips. Results appear as you type.
🌐
Bilingual
Full English and Chinese support on every tool.
📱
Mobile Friendly
Works great on phones, tablets, and desktops.
Our Tools
Freemaki offers 38 free tools across seven categories:
- Developer Tools (8): JSON Formatter, Regex Tester, Timestamp Converter, Base64 Encoder, JWT Decoder, Hash Generator, Case Converter, Password Generator
- Design & Media (7): Color Converter, CSS Gradient Generator, Font Pairing, Color Palette Extractor, Image Format Converter, QR Code Generator, Browser Info Detector
- Productivity (4): Unit Converter, Random Picker, Character Counter, Aspect Ratio Calculator
- Health & Lifestyle (4): Calorie Calculator, Pomodoro Timer, BMI Calculator, Sleep Calculator
- Finance & Tax (7): 1099 Tax Calculator, Loan Calculator, Compound Interest Calculator, Freelance Pricing Calculator, Meeting Cost Calculator, Salary Survival Engine, Middle Class Calculator
- SEO & Utilities (5): Markdown Editor, CSS Minifier, IP Address Lookup, Safe Zone Checker, Lorem Ipsum Generator
- Guides & Articles (18): In-depth tutorials on web development, design, personal finance, SEO, and tool usage — published in our blog section
Quality & Accuracy
Every calculator and converter on Freemaki is tested against known values and edge cases before publication. Our quality standards:
- Formula verification: Financial tools use standard IRS tax formulas (2026 brackets), loan amortization equations, and compound interest formulas. Results are cross-checked with official calculators where available.
- Health guidelines: Calorie, BMI, and sleep calculators reference NIH, CDC, and peer-reviewed research. They are designed for general wellness tracking — not medical diagnosis.
- Data sources: Salary Survival Engine uses publicly available cost-of-living data. Tax calculators reference current federal and state tax tables. All data sources are cited on individual tool pages.
- Regular updates: Tax brackets, healthcare subsidies, and cost-of-living indexes are updated annually. All changes are documented in our blog changelogs.
Tool Limitations & Disclaimers
We believe in transparency about what our tools can and cannot do:
- Financial & Tax tools are estimates based on publicly available information. They do not constitute professional financial, tax, or legal advice. Always consult a qualified CPA or financial advisor for your specific situation.
- Health calculators are for general informational purposes only and are not a substitute for professional medical advice, diagnosis, or treatment.
- Cost-of-living estimates in the Salary Survival Engine are based on aggregated public data and may not reflect your individual circumstances.
Blog & Guides
Beyond tools, we publish in-depth guides and tutorials on web development, design, productivity, and SEO. Each article is written to provide real, actionable value — not filler content. Browse our latest articles.
Built With
Freemaki is built with pure HTML, CSS, and JavaScript. No frameworks, no build tools, no heavy dependencies. This keeps the site fast to load and easy to maintain. We use Vercel for hosting and Cloudflare for DNS and CDN.
Open & Transparent
Our source code is publicly available on GitHub. If you find a bug, have a feature request, or want to contribute, feel free to open an issue or pull request.