Free · Private · No signup
Free UK Tools & Calculators
Instant mortgage, stamp duty, tax and everyday utilities — plus developer tools like JSON, Base64 and regex. Everything runs in your browser. Fast, clear, and free to use.
- Tools
- 10
- Cost
- £0
- Account
- None
Browse free tools
10 calculators and utilities — all free, all client-side.
Finance & Money
Mortgages, tax, stamp duty and money calculators for the UK.
UK Mortgage Calculator
Finance & Money
Estimate monthly mortgage repayments from loan amount, rate and term.
Open tool →UK Stamp Duty Calculator
Finance & Money
Calculate SDLT, LBTT and LTT for England, NI, Scotland and Wales.
Open tool →UK Income Tax / Take-home Pay Calculator
Finance & Money
Estimate income tax, National Insurance and take-home pay (UK).
Open tool →Health & Fitness
Simple health metrics and wellness calculators.
Developer Tools
JSON, Base64, regex and other utilities for developers.
JSON Formatter & Validator
Developer Tools
Beautify, minify and validate JSON in your browser.
Open tool →Base64 Encoder / Decoder
Developer Tools
Encode text to Base64 or decode Base64 back to text.
Open tool →Regex Tester
Developer Tools
Test JavaScript regular expressions against sample text live.
Open tool →Everyday Utilities
Percentage, units, text tools and day-to-day helpers.
Percentage Calculator
Everyday Utilities
Work out percentages, increases, decreases and “what percent of”.
Open tool →Unit Converter
Everyday Utilities
Convert length, weight, temperature and volume units instantly.
Open tool →Text Case Converter & Word Counter
Everyday Utilities
Change text case and count words, characters and sentences.
Open tool →Why use Free UK Tools?
Private calculations
Tools run client-side. Your figures are not stored in a database or sent to our servers.
Built for the UK
Stamp duty by nation, UK tax bands, and mortgage maths that match common UK products.
Fast & free
No paywalls, no accounts. Open a tool and get an answer in seconds on any device.