Other free, no-signup tools from the same family.
A small collection of single-purpose web tools that share this site's design and operating principles: do one thing well, run in the browser, charge nothing, no tracking of your input.
Time and dates
For working with timestamps, durations, and calendar math.
Epoch Time Converter
Convert Unix timestamps, ISO 8601, and specialty formats (LDAP, .NET ticks, Chrome, GPS, Excel, Julian Day).
epochtime.tools →Calculate Hours
Add up worked hours from a timesheet, with breaks and overtime.
calculatehours.net →Age Calculator
Exact age in years, months and days between any two dates.
theagecalculator.net →World Clock
Current time across time zones, with meeting-time overlap.
clockwithus.com →Encoding and decoding
Convert between text and binary formats safely.
Data, hashing, and security
Inspect, transform and verify data without uploading it anywhere.
JSON Tools
Format, validate, diff and query JSON.
jsontools.tools →Hash Generator
MD5, SHA-1, SHA-256 and more, computed locally.
hashgenerator.tools →UUID Generator
Generate and inspect UUIDs across versions.
uuidcore.com →Password Strength Checker
Measure real password strength, offline.
passwordstrength.net →Crontab Cheat Sheet
Read and write cron expressions in plain English.
crontabsheet.com →Regex Guide
Build, test and understand regular expressions.
regexguide.com →Remove Metadata
Strip EXIF and document metadata before you share a file.
removemetadata.tools →Network and web
Addressing, subnets, and what the internet knows about you.
CIDR Calculator
Work out CIDR ranges, hosts and address blocks.
cidrcalculator.net →Subnet Mask Calculator
Convert between masks, prefixes and usable host counts.
subnetmaskcalc.net →Internet Speed Test
Client-side speed test: download, upload, ping and jitter in your browser. No app, no sign-up, nothing stored.
checkinternetspeed.tools →Check My IP
Your public IPv4 and IPv6 address, with approximate location, ISP and network diagnostics. Zero IP logging.
checkmyipnow.com →WHOIS Lookup
Any domain's registrar, status, nameservers and expiry via modern RDAP, with plain-language status decoding and homograph checks.
whoislookuppro.com →Writing and text
Counting, converting and reshaping text.
Word Counter
Word, character, sentence and reading-time counts.
wordcounterfree.com →Text Repeater
Repeat text with separators and counts.
textrepeat.net →Case Converter
Convert between camelCase, snake_case, Title Case and more.
transformcase.com →Number to Words
Convert any number to words in the Indian (lakh, crore) or international system, with correct commas and cheque-ready output.
numtotext.com →Math and measurement
Everyday arithmetic, units, and geometry.
Percentage Calculator
Percentages, increases, decreases and differences.
bestpercentagecalculator.net →Unit Cheat Sheet
Convert units and see the conversion factors.
unitcheatsheet.com →Fraction Calculator
Add, subtract, multiply, divide and simplify fractions, with every step shown plus visuals and practice.
fractionsteps.com →GPA Calculator
GPA, CGPA and SGPA for US and Indian students. Convert CGPA to percentage and plan the grades you need.
gpacalculatorhq.com →Square Footage
Area in square feet for rooms, walls and lots.
thesquarefootagecalculator.com →Box Volume Calculator
Volume and capacity for rectangular boxes.
boxvolumecalculator.com →Tank Volume Calculator
Exact partial-fill maths for cylinders, obround oil tanks, propane vessels and cone-bottom tanks. Gallons, litres, printable charts.
tankvolumecalc.com →Girth Calculator
Length plus girth for shipping size limits.
girthcalculator.com →Dimensional Weight
Billable weight for couriers and freight.
dimweightcalc.com →Money and business
Interest, margins, and long-run projections.
Margin vs Markup
The difference that costs businesses money, calculated both ways.
marginvsmarkup.com →Total Interest Calculator
How much interest you'll really pay on a mortgage, auto, personal or student loan, and what extra payments save.
totalinterestcalc.com →SIP Calculator Hub
Post-tax, inflation-adjusted SIP projections. Goal solver, step-up, SWP and irregular-cashflow XIRR.
sipcalculatorhub.com →Home, energy, and construction
Sizing, material take-offs, and what the job actually needs.
Solar Calculator
Size a solar array from your real consumption.
prosolarcalc.tools →Solar Battery Bank Calculator
Size a battery bank, array, charge controller and inverter from your real daily load. Brand-agnostic.
solarbatterybankcalc.com →Voltage Drop Calculator
Voltage drop and minimum wire size, with NEC 3%/5% compliance checks and the energy cost of the loss.
voltdropcalc.com →Backup Power Calculator
Size a generator or battery by real appliance load, including the startup surge most calculators miss.
backuppowercalc.com →AC Tonnage Calculator
AC size in tons, BTU and kW from room size, climate and sun, for US and Indian homes, plus running cost.
actonnagecalc.com →Stair Calculator
Rise, run, stringer length and angle, checked live against IRC, IBC, UK Part K, Eurocode or AU NCC, with a printable build packet.
staircalculators.net →Concrete Material Calculator
Cement bags, sand, aggregate and water by grade (M5-M25) in m3, cft and brass, for India. Includes a BOQ builder.
concretematerialcalc.com →Concrete Calculator
Cubic yards, bags, ready-mix loads and weight for slabs, footings, columns and walls, with a waste margin.
cubicyardage.com →Roofing Material Calculator
Build a roof section by section for a full take-off: shingle bundles, starter strip, ridge cap, underlayment, drip edge and nails.
roofingmaterialcalc.com →Construction Calc HQ
Material and cost calculators with traceable formulas (ACI, ASTM, IRC, TCNA) and national-average cost estimates.
constructioncalchq.com →Pool Volume Calculator
Gallons, litres or m3 for rectangle, round, oval, kidney and freeform pools, including sloped and deep-end floors.
poolvolumecalc.com →Health and food
Bodies and kitchens, measured properly.
TDEE Calculator
Total daily energy expenditure via Mifflin-St Jeor, Harris-Benedict and Katch-McArdle, from your job and real training time.
calorieskit.com →BMI, BMR & TDEE Calculator
BMI, BMR and TDEE with calorie targets, macros, a printable report and a week-by-week goal plan.
bmibmrcalc.com →MeasureChef
Kitchen calculators: sourdough starter feeding, baker's percentage, hydration and pan conversion.
measurechef.com →Images and files
Work on files in the browser, without uploading them.
Picture Toolkit
Resize, convert and compress images locally.
pictoolkit.com →CorePDFTools
Merge, split, compress, convert, sign and protect PDFs entirely in your browser. Files are never uploaded.
corepdftools.com →Color Code Kit
Pick a colour and get HEX, RGB, HSL, HSV, OKLCH and CMYK, with contrast checking and colour-blindness simulation.
colorcodekit.com →Barcode & QR Generator
EAN-13, UPC-A, Code 128, GS1 and QR with logo, plus a live scannability check.
barcodeandqr.com →