Questions about our free online tools.

ToolHiveHub currently offers the following tools:

Calculators

• BMI Calculator — calculate Body Mass Index from height and weight
• Age Calculator — find your exact age in years, months, and days
• Loan Calculator — estimate monthly repayments, total interest, and total cost
• Percentage Calculator — solve common percentage problems instantly

Text Tools

• Word Counter — count words, sentences, and reading time
• Character Counter — track characters, spaces, and lines
• Case Converter — convert text to UPPER, lower, Title, and more
• Slug Generator — create clean, SEO-ready URL slugs

Developer & Generator Tools

• JSON Formatter — format, validate, and minify JSON
• QR Code Generator — generate QR codes for URLs, text, and WiFi
• Password Generator — generate strong, secure random passwords

Image Tools

• Image Compressor — compress JPG, PNG, and WebP images in your browser
• HEIC to JPG Converter — convert iPhone HEIC photos to JPG, PNG, or WebP

More tools are in development. Check the Tools page for the latest list.

Our calculators use standard, well-established formulas. The BMI calculator uses the international WHO formula; the loan calculator uses the standard amortisation formula; the calorie calculator uses the Mifflin–St Jeor equation. Results are accurate for general reference. For medical, financial, or clinical decisions, always consult a qualified professional.

Enter your height and weight (in metric or imperial units) and the tool calculates your Body Mass Index using the formula BMI = weight (kg) ÷ height² (m²). The result is displayed alongside the standard WHO weight categories (Underweight, Normal, Overweight, Obese) so you can see where your result falls. BMI is a screening tool, not a diagnostic measure — factors like muscle mass and body composition aren't captured by it.

Enter the loan amount, annual interest rate, and loan term in months or years. The calculator uses the standard amortisation formula to compute your fixed monthly repayment, the total amount repaid over the loan term, and the total interest paid. This is useful for comparing personal loans, mortgages, or car finance options before speaking to a lender.

Once a tool page has loaded, most calculators run entirely in your browser with no further network requests. If you lose your connection mid-session the tool will keep working. However, tools that depend on live data (like currency rates) will require an active internet connection to fetch up-to-date figures.

No. All calculation, conversion, and file processing logic runs locally in your browser. The values you type — your height, weight, loan amount, text content — and any images or files you upload to tools like the Image Compressor or HEIC to JPG Converter are never sent to our servers and are never stored or logged. When you close or navigate away from a tool, that data is gone.

We use localStorage (not cookies) to remember your dark/light mode preference — no tracking data is stored there. If we display Google AdSense ads, those ads may set third-party cookies as governed by Google's privacy policy. See our Privacy Policy for full details.

We do not collect personal information directly. We may use privacy-respecting analytics to understand general traffic patterns (e.g., which tools are most popular), but this data is aggregated and not tied to individual users. We will never sell your data to third parties.

Hosting, development, and ongoing maintenance have real costs. Ads allow us to keep every tool permanently free without charging users or restricting access. We aim to keep the ad experience unobtrusive — you'll never see pop-ups, auto-playing video ads, or interstitials that block tool usage.