About FreeToolset
95+ free online tools · runs locally in your browser · collects no data
Who Runs This Site
FreeToolset was created, developed, and is continuously maintained by a single independent webmaster, TMFS — not affiliated with any company and with no team. From tool selection and page development to copywriting, server deployment, and daily updates, everything is done by TMFS alone.
The reason for building this site is simple: daily work always calls for small utilities — formatting a piece of JSON, calculating a mortgage payment, or compressing an image to an uploadable size. But most similar sites online are either stuffed with pop-up ads, force you to register, or upload your files to some unknown server. That's why FreeToolset exists: no pop-ups, no sign-up, no uploads, no fees.
Since its launch in 2025, the number of tools has grown from an initial 9 to today's 95+, and is still expanding. If a tool miscalculates, breaks, or you can't find the tool you need, feel free to contact me directly — I read every email.
Our Principles
- 🔒 Privacy First — the vast majority of tools compute in your browser locally; the text, images, and numbers you enter never leave your device and are never uploaded to any server.
- ⚡ Instant Use — pure front-end implementation with no server round-trips; open the page and use it immediately, with real-time results.
- 🆓 Completely Free — no hidden charges, no membership tiers, no account registration.
- 🚫 No Ads, No Tracking — no advertising pop-ups, no tracking cookies, and no selling of user data.
- 📱 Works on Every Device — desktop, tablet, and mobile browsers all work normally, with no app install required.
- 📖 Transparent & Verifiable — the calculation method and scope of every tool are documented on its page, and tools involving health or finance carry clear disclaimers.
Tool Categories
We currently offer 95+ free online tools across the following six categories:
- Calculators — mortgage, loan, compound interest, BMI, salary, VAT, discount, and GPA calculators, 20+ in total.
- Developer Tools — JSON format / validate / minify, Base64 encode-decode, regex tester, JWT parser, SQL formatter, hash generator, UUID generator, Cron expression generator, 17+ in total.
- Text Tools — word counting, case conversion, text diff, deduplication and blank-line removal, find & replace, word-frequency counting, simplified-traditional conversion, text sorting, 13+ in total.
- Unit & Format Converters — length, weight, temperature, area, volume, speed, time, and data-storage unit conversions, plus CSV / JSON / XML / YAML / Markdown interconversion.
- AI Writing Tools — AI article generation, product description generation, content rewriting, SEO meta generation, email subject generation, plus the multi-model AI Studio.
- Fun & Random Tools — coin flip, dice roll, random numbers, random name picker, random team generator, Morse code, Roman numerals, fancy text generation, and more.
Can't find the tool you want? Tell me and I'll add the most requested ones to the development list.
Technical Implementation
FreeToolset is built with plain HTML, CSS, and vanilla JavaScript — no front-end framework and no build step, with minimal dependencies (only a few tools such as the QR code generator load libraries from a CDN). This keeps the site lightweight, fast-loading, and easy to maintain. The tools make heavy use of modern browser-native capabilities, such as the Canvas API (image processing), Web Crypto API (hashing and password strength), and File API (local file reading).
The site is hosted on Vercel's global edge network with HTTPS enforced site-wide. A few features that need connectivity (such as AI writing) are proxied through server-side endpoints; all other tools communicate with no server at all.
Content & Responsibility Disclaimer
Calculation results from this site's tools are for reference only. Calculators involving health (such as BMI, body fat, calories, water intake) and finance/tax (such as mortgage, loan, compound interest, salary, VAT) use publicly available standard formulas that cannot account for individual differences, regional policy differences, or actual contract terms, and do not constitute medical, investment, or tax/legal advice. Before making important decisions, please consult a doctor, financial institution, or licensed professional. The relevant pages all carry corresponding disclaimers.
This site does not collect or store the content users enter into its tools; see the Privacy Policy for details.
Contact
For questions, suggestions, bug reports, or collaboration, feel free to use the form on the contact page, or email freetoolset.app@gmail.com directly. When reporting a tool error, please include the page URL and your input so I can reproduce and fix it quickly.