I've been freelancing on the side for a while, and one thing that always annoyed me: every decent invoicing or contract tool wants a monthly subscription just to generate a basic PDF.
So I built GetSoloTools — a collection of free, browser-based tools for freelancers. No accounts, no paywalls, no data stored anywhere.
What's in it
Invoice Generator — professional PDF invoices with line items and tax
Contract Generator — basic service contract with scope, payment, and IP terms
Hourly Rate Calculator — figure out what you actually need to charge to hit your income goals
Tax Estimator — quarterly self-employment tax estimate (US-based)
Late Payment Fee Calculator — know exactly what a client owes when they're overdue
Time Tracker — log billable hours by project, export to CSV
Milestone Payment Calculator — split a project into structured payment phases
Freelance Savings Calculator — see what's actually left to save after taxes and expenses
Plus: Receipt Generator, Quote Generator, Budget Planner, Project Profit Calculator, Invoice Tracker, Client Proposal Generator
All 14 tools run entirely in the browser. Vanilla HTML/CSS/JS — no framework, no backend.
Why no framework
Kept it simple on purpose. The tools need to work instantly on any device, load fast, and never break due to a dependency update. No React, no build step, no server.
What I learned building this
The hardest part wasn't the code — it was the tax logic. Getting self-employment tax (SE tax on 92.35% of net profit, then deducting half of SE tax from taxable income before applying brackets) right took more iteration than I expected.
Also: users don't read instructions. Every tool needs to work intuitively without any explanation, which forced me to simplify inputs significantly from the first versions.
What's next
Currently working on adding more state-specific content and refining the savings calculator. AdSense approval pending — if you have thoughts on monetizing free tools without ruining the UX, I'd genuinely love to hear them.
👉 https://getsolotools.com
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