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Free, private tools and guides for freelancers and AI builders — plus FreelanceOS to run your business. Most tools work without an account and collect no personal data.

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Free Course

Become an AI engineer, one free lesson at a time.

46 lessons from Python foundations to production AI systems — RAG, agents, evals, and deployment — with a graded check-yourself quiz after every lesson. No account, no payment, ever.

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Free beta

FreelanceOS — run your freelance business in one place.

Clients, projects, auto-numbered PDF invoices, payments and expenses together — with a dashboard that shows what you've earned and what's overdue. Free while in beta.

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Free Tools

Free tools for work, money and AI.

Prompt Architect

Advanced system prompt flattener with live token counting and API cost estimation for LLM workspaces.

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JSON Engine

Turn JSON into TypeScript interfaces, Zod schemas, and JSONPath queries — entirely in the browser.

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SVG Studio

Optimize SVGs, preview on a checkerboard, and export React or Vue components without leaving your machine.

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Env Formatter

Sort, deduplicate, and validate .env files locally with sharp, minimalist output — secrets never leave the tab.

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Prompt Packager

Flatten multi-file context into one LLM-ready block with character and token estimates for Cursor and Claude.

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Invoice Generator

Freelancer invoice builder with live PDF preview, line items, tax configuration, and bank wire details.

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Debt Optimizer

Short, Medium, and Long plans that clear debt while building savings — no monthly payment guesswork.

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Fuel Tracker

Log fill-ups, track L/100km efficiency, and monitor fuel costs across multiple vehicles with cross-device sync.

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Articles & Guides

Practical reads for everyday tasks.

View all 17 articles

Fuel & CarsJul 2026·6 min read

How to Track Your Car's Fuel Efficiency

A practical guide to calculating L/100km and km/L, logging fill-ups correctly, and understanding what affects your real-world fuel consumption.

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Fuel & CarsJul 2026·6 min read

How to Save Money on Fuel Every Month

Driving habits, tyre pressure, route planning, and vehicle maintenance changes that consistently reduce monthly fuel spend without changing how far you drive.

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Freelance FinanceJul 2026·7 min read

How to Write a Freelance Contract That Actually Protects You

The six essential clauses every freelance contract must include — scope, payment schedule, revision limits, IP ownership, kill fees, and governing law.

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Freelance FinanceJul 2026·5 min read