Overview
BentoUtils is a library of more than 250 free calculators, converters and file tools. Each one does a single job, opens instantly and runs entirely in your browser. Nothing is uploaded, nothing is tracked and there is no account to create.
Key Features
- Private by design: every calculation and file conversion happens on your device. Your files never leave it.
- Free, no limits: no usage caps, no subscription, no paid tier.
- Explained, not just answered: each tool has a short guide with worked examples and an FAQ, so you can see how the result was reached.
- Plain-language help: technical terms carry a small "?" badge that explains them on hover.
- Works everywhere: any modern browser on desktop, iPhone or Android, and it can be added to your home screen.
Use Cases
- Electronics: resistor color codes, Ohm's law, LED resistors, PCB trace width.
- Construction: concrete, board feet, rafter length, stair stringers, tile.
- Food and brewing: sourdough hydration, sous vide, canning, hydrometer correction.
- Photography: depth of field, lens field of view, golden hour.
- Finance: loans, mortgages, inflation, EU VAT.
- Fitness: one-rep max, training zones, race pace splits.
- Developers: regex tester, cron builder, Unix timestamps, JSON to CSV.
- File tools: HEIC to PDF, GPX to CSV, QR codes, batch image resizing.
Getting Started
Open bentoutils.com, pick a category or search for a tool, enter your values or drop in a file, and read the result. There is nothing to install or configure.
Pricing & Plans
Entirely free. Every tool is available to everyone with no limits and no account.
Good to Know
Very large files depend on your device's memory and speed. Calculators give estimates, so check safety-critical results against local codes or a professional. Nothing here is financial, tax or medical advice.
The section headings (Overview, Key Features, Use Cases, Getting Started, Pricing & Plans) follow the example list in their form.
