Free Browser Apps, Business Tools, Engineering Tools, and Web Utilities

Popular Free Business Tools

Run your small business more efficiently with these free browser-based business apps. Generate invoices, plan finances, analyse risk with FMEA, and run root cause investigations — all from your browser with no software to install.

• Free Invoice Generator — Create, Preview & Download PDF Invoices
  Create professional invoices in minutes. Add line items, taxes, and your logo, then download as PDF or email directly. Best for: freelancers, contractors, small businesses who need a fast free invoicing tool.
  Open Free Invoice Generator →
• Visual Finance Planner — Budget, Cashflow & Financial Forecasting
  Plan budgets, model cashflow, and visualise financial scenarios on an interactive canvas. Best for: small business owners and finance teams who want a free visual finance planning tool.
  Open Visual Finance Planner →
• Free FMEA Tool — Failure Mode and Effects Analysis Online
  Identify failure modes, assess severity, occurrence, and detectability, and calculate RPN scores in this free browser FMEA tool. Best for: quality engineers, maintenance teams, and reliability professionals.
  Open Free FMEA Tool →
• Root Cause Analysis Tool — Free RCA Worksheet Online
  Structure a root cause investigation with a guided RCA worksheet. Document the problem, contributing factors, and corrective actions. Best for: plant managers, quality teams, and anyone running an incident review.
  Open Root Cause Analysis Tool →
• 5 Whys Analysis Tool — Mobile-First Root Cause Visualizer
  Run a 5 Whys investigation with evidence tracking, action items, and a visual tree. Works great on mobile. Best for: maintenance, quality, and operations teams doing structured problem solving.
  Open 5 Whys Analysis Tool →

Free Engineering and 3D Design Tools

Professional-grade 3D engineering tools that run entirely in your browser — no CAD licence, no installation. Design parts, generate STL files for 3D printing, and solve engineering layout problems for free.

• 3D Mould Builder — Free Online Injection Mould Designer
  Design 3D injection mould cavities step by step. Add geometry, define parting lines, generate mould halves, and export STL/OBJ. Best for: product designers, engineers, and makers building prototype moulds.
  Open 3D Mould Builder →
• 3D Revolve STL Generator — Free Solid of Revolution Tool
  Enter a 2D profile function and revolve it into a 3D solid. Create vases, bowls, columns, and bottles, then export STL for 3D printing. Best for: makers, ceramic designers, and engineering students.
  Open 3D Revolve STL Generator →
• 3D Surface Plane Plot Generator — Free Math Surface Visualizer
  Type any f(x,y) mathematical function and instantly render a 3D surface mesh. Choose from 40+ presets or write your own formula. Export STL/OBJ/GLB. Best for: students, educators, and 3D artists.
  Open 3D Surface Plotter →
• Browser CAD Frame Builder — Full 3D Design Suite
  A complete browser-based 3D CAD environment powered by Babylon.js. Model, assemble, and export 3D designs without installing any software. Best for: engineers and designers who need a free browser CAD tool.
  Open Browser CAD Frame Builder →
• Free Piping Layout Designer — Plan pipe routes and layouts in the browser
• Free Junction Box Designer — Size and configure electrical junction boxes online
• Free Arc Flash Safety Calculator — Calculate electrical arc flash incident energy and PPE requirements

Free Reliability and Maintenance Tools

Structured reliability and maintenance tools built for operations teams — run failure mode analysis, investigate root causes, track assets, and prioritise improvement projects without expensive software.

• Free FMEA Tool — Failure Mode and Effects Analysis Online
  Identify failure modes, score severity, occurrence, and detectability, and calculate RPN values in this free browser FMEA spreadsheet. Generate a prioritised risk register for any process or product. Best for: quality engineers, maintenance teams, and reliability professionals.
  Open Free FMEA Tool →
• Free 5 Whys Analysis Tool — Mobile-First Root Cause Visualizer
  Run a structured 5 Whys investigation with evidence capture, action items, and a visual tree diagram. Built for mobile use on the plant floor. Best for: maintenance, quality, and operations teams doing structured problem solving.
  Open 5 Whys Analysis Tool →
• Free Root Cause Analysis Tool — Structured RCA Worksheet
  Document the problem statement, contributing factors, and corrective actions in a guided RCA worksheet. Covers fishbone, 5 Whys, and change analysis. Best for: plant managers, quality teams, and anyone running an incident or non-conformance review.
  Open Root Cause Analysis Tool →
• Free Asset Life Cycle Tracker — Maintenance History Log
  Track asset install dates, maintenance events, costs, and lifecycle stages in a free browser-based asset tracker. Best for: maintenance managers and facilities teams managing equipment without a full CMMS.
  Open Asset Life Cycle Tracker →
• Free Benefit-Effort Matrix — Project Prioritisation Tool
  Plot improvement projects, initiatives, or tasks on a 2×2 benefit-vs-effort matrix to identify quick wins and deprioritise low-value work. Best for: operations managers and continuous improvement teams.
  Open Benefit-Effort Matrix →

Free Browser Utilities

120+ everyday utilities that run directly in your browser — mortgage calculators, budget planners, timers, converters, note tools, and more. No signup, no install, completely free.

• Free Mortgage Calculator — Monthly Payment & Amortisation
  Calculate your monthly mortgage payment, total interest paid, and full amortisation schedule. Enter principal, rate, and term. Best for: first-time buyers, homeowners, and anyone comparing mortgage options.
  Open Free Mortgage Calculator →
• Free Budget Calculator — Personal & Business Budgeting Tool
  Track income, fixed expenses, variable spending, and savings targets in one free browser budget tool. Generates a clear breakdown of where your money goes. Best for: individuals, households, and small business owners.
  Open Free Budget Calculator →
• Free Audio Spectrum Analyser — Real-Time Browser Visualizer
  Visualise audio frequencies in real time using your browser microphone or an uploaded audio file. Useful for sound checks, music production, and acoustic troubleshooting. Best for: musicians, engineers, and audio enthusiasts.
  Open Audio Spectrum Analyser →
• Free Brain Dump Notes App — Fast Capture Tool
  Dump thoughts, tasks, and ideas instantly with no account, no login, and no distractions. Notes persist in your browser. Best for: anyone who needs a fast, frictionless place to capture ideas on the fly.
  Open Brain Dump Notes →
• Free Arc Flash Safety Calculator — Incident Energy & PPE
  Calculate arc flash incident energy and required PPE level for electrical panels and switchgear. Enter bus voltage, fault current, and working distance. Best for: electricians, electrical engineers, and safety managers.
  Open Arc Flash Calculator →

Why SolvProb Builds Free Tools

SolvProb is a custom software engineering company based in British Columbia, Canada. We build free browser tools for two reasons: to give back to the small business and engineering communities we serve, and to demonstrate what's possible with modern web technology.

Every free tool in this gallery was built by the same engineers who build paid custom software for our clients. When you use a SolvProb free tool, you're using production-quality code — not a demo or prototype.

We serve clients across Kitimat, Terrace, Prince Rupert, Victoria, Vancouver, and all of British Columbia. Our tools are used by tradespeople, manufacturers, small business owners, engineers, and students across Canada.

Need a Custom Tool Built for Your Business?

If you need a tool that does exactly what your business needs — not a close-enough free version — SolvProb builds custom web apps, automation tools, and business software tailored to your workflow. We work with small businesses, industrial companies, and service firms across BC.

Common custom projects we build: custom invoice and quoting systems, maintenance and reliability dashboards, 3D configurators and product builders, inventory and booking systems, and operations reporting tools.

Free Browser Games — Play Instantly, No Download

40+ free browser games built by SolvProb engineers — action shooters, space combat, real-time strategy, farming sims, and trades-themed simulations. Great for training breaks and team-building activities.

• Alien Shooter — Free Space Shooter Browser Game
  Defend against waves of alien invaders in this fast-paced top-down space shooter. Upgradeable weapons, multiple enemy types, and boss fights. No download, play instantly in your browser.
  Play Alien Shooter Free →
• Grid Command: 3D Ground Battle — Free Tactical Strategy Game
  Command ground forces on a 3D tactical grid. Deploy units, manage resources, and outmaneuver the enemy in this real-time strategy browser game. Best for: strategy game fans who want a free browser RTS.
  Play Grid Command Free →
• CEO Business Simulator — Free Management Simulation Game
  Run a company from startup to enterprise. Make hiring, pricing, R&D, and marketing decisions across multiple industries and economic cycles. Best for: business students and management training programs.
  Play CEO Simulator Free →
• Electrician Trades Simulator — Free Electrical Trades Game
  Complete electrical wiring jobs, troubleshoot faults, and pass inspections in this trades training simulation. Designed for apprentices and trade educators. Best for: electrical apprentices and vocational training.
  Play Electrician Simulator Free →
• Gas Fitter Simulator — Free Trades Training Game
  Install gas lines, connect appliances, and pass safety inspections in this gas fitting trades simulation. Built to help apprentices understand gas fitting workflows. Best for: gas fitting students and trade instructors.
  Play Gas Fitter Simulator Free →
• Cybercore Shooter 2 — Free Sci-Fi Action Game — High-speed cyberpunk shooter with unlockable weapons and escalating difficulty
• 3D Battleship — Free Classic Battleship Game in 3D — The classic naval strategy game reimagined in a full 3D browser environment