The tools you actually need, without the nonsense.
No sign-up, no upload queue, no file-size gate, no watermark on the way out. Every tool here runs inside your browser and starts working the moment you paste something in.
Nothing is uploaded
Files and text are processed by your own browser. There is no server to leak them.
Results as you type
Every calculation recomputes live. No "calculate" button, no page reloads, no queues.
Works offline
Once a tool has loaded it keeps working without a connection. Bookmark it and go.
Most used
Quick access to our highest-demand calculators and utilities
Income Tax Calculator
Calculate net take-home, PAYE, self-employment, dividends & capital gains tax.
Open toolMortgage Calculator
Full amortization schedule, overpayment modelling and interest saved.
Open toolCompound Growth
Project cash savings, funds and other investments together, in real terms.
Open toolJSON Formatter
Format, validate, query and turn any JSON into typed interfaces.
Open toolRegex Tester
Live matches, highlighted groups and a plain-English breakdown.
Open toolImage Compressor
Shrink and convert JPEG, PNG and WebP without your files leaving the device.
Open toolEvery tool
Finance
Loans, tax and long-horizon compounding, worked out to the last decimal.
Developer
Format, convert and test the things you touch fifty times a day.
Media
Images, icons and PDFs processed on your machine — files never upload.
Productivity
Small instruments for writing, planning and working across time zones.