Sixteen browser tools
Small single-purpose tools: calculators, converters and planners. Each one runs entirely in your browser, so what you type into it never reaches this site. They are free, they need no account, and they have been online since January 2026.
Contract red flag scanner
Reads a freelance contract and points at the clauses worth arguing about before you sign.
Freelance quote builder
Builds a quote with the scope written down, and gives you a PDF of it.
Meeting cost calculator
Adds up what a meeting is costing while it runs, from who is in the room.
Resume buzzword bingo
Counts the corporate jargon in a job posting and scores it.
Side project ROI calculator
Works out what your side project pays per hour, against what freelancing would.
Remote work savings calculator
Adds up what working from home saves you: commute, lunches, clothes and the rest.
Salary to hourly converter
Turns an annual salary into an hourly rate, with tax, holidays and overtime taken into account.
Time zone meeting planner
Finds the hours that are working hours in every time zone on the list.
Email subject line scorer
Scores a subject line out of 100 and says what is dragging it down.
Startup equity calculator
Works out what a package of stock options is worth now, and what it would be worth later.
Reading time calculator
Gives the reading time, the speaking time and the statistics for a piece of text.
Screen time value calculator
Turns your daily phone time into a year, and into what that year is worth.
Password generator
Makes a password of the length and shape you choose. It is generated in your browser and sent nowhere.
Tip calculator
Works out the tip and splits the bill, with the amount per person.
Age calculator
Your age in years, months, days and hours, and a few things that happened along the way.
Loan payment calculator
Monthly payment, total interest and the full repayment schedule.
They are Horizon Logic's own, and they stay free
Each one was built to be genuinely useful and to keep the stack honest. They cost nothing to run, because they run on your machine and not on a server: there is no account, no database behind them, and no advertising on any page of this site.
The work Horizon Logic sells is the larger version of the same thing: web applications, business tools, integrations, and finishing a project someone else left.
Tell me what you need
One paragraph is enough. I answer within two working days, and the answer is either a quote or an honest reason why I am not the right person for it.