Beyond URL encoding, we maintain a small family of free online tools — calculators, encoders, generators, and utilities — built with the same philosophy: fast, accurate, free, no signup required. Bookmark anything that’s useful.
Why we link these. These are sites in our own network, linked openly with rel="nofollow noopener". We link them because they're built to the same standard — honest, fast, and free — not as paid placements.
Calculate voltage drop and correct wire gauge for any DC or AC run across NEC, CEC, BS 7671, AS/NZS and IEC standards.
voltdropcalc.com
Professional solar sizing and design tools for installers and serious DIY builders, from panels through to storage.
prosolarcalc.tools
Off-grid and backup battery-bank sizing with real engineering — usable capacity, C-rate, voltage and chemistry.
solarbatterybankcalc.com
Size a generator or battery backup to the loads you actually need to run, with realistic runtime and surge-watt figures.
backuppowercalc.com
Work out AC tonnage and cooling load from area, climate, insulation and sun exposure, for US and India.
actonnagecalc.com
A hub of construction estimating calculators — concrete, materials, costs and quantities — built the way contractors work.
constructioncalchq.com
India-focused concrete and material calculators for slabs, columns, footings and mixes, with bag counts.
concretematerialcalc.com
Estimate roofing materials — shingles, underlayment and squares — from roof area and pitch, with a pitch helper.
roofingmaterialcalc.com
Concrete and bulk-material calculators in cubic yards for slabs, footings, walls and stairs, with a waste margin.
cubicyardage.com
Lay out stairs correctly — rise, run, stringer length and headroom — to code, with a clear diagram.
staircalculators.net
Measure square footage for floors, walls, rooms and land across many shapes, with unit conversion handled.
thesquarefootagecalculator.com
Calculate the volume and capacity of boxes, cartons and rectangular containers in any units.
boxvolumecalculator.com
Find the volume and fill level of tanks in many shapes for water, fuel and chemical storage.
tankvolumecalc.com
Compute dimensional (volumetric) weight for FedEx, UPS, USPS and more, and compare against actual weight.
dimweightcalc.com
Measure a package's girth and combined length-plus-girth and check it against carrier oversize limits.
girthcalculator.com
Calculate exact pool volume for any shape in gallons, litres or m³, accurate on sloped and deep-end floors.
poolvolumecalc.com
See the full lifetime cost of a mortgage or loan — total interest, amortization and extra-payment effects.
totalinterestcalc.com
An EMI calculator built for India covering home, car and personal loans plus credit-card EMI with GST.
indiaemi.com
Project SIP and mutual-fund returns for Indian investors with post-tax and inflation-adjusted figures.
sipcalculatorhub.com
Convert between margin and markup and price products correctly, clearing up the common confusion.
marginvsmarkup.com
Handle every kind of everyday percentage problem — of a number, change, increase, decrease, reverse.
bestpercentagecalculator.net
Format, validate, minify and explore JSON in your browser, with a tree viewer for large payloads.
jsontools.tools
Encode text and files to Base64 or decode them back, entirely client-side — nothing you paste leaves your machine.
base64decode.tools
Generate MD5, SHA-1, SHA-256 and other cryptographic hashes from text or files for checksums and integrity.
hashgenerator.tools
Generate UUIDs in bulk and learn how the different versions work, with copy-ready output.
www.uuidcore.com
Build, test and understand regular expressions with live matching and a plain-language reference.
regexguide.com
Build cron schedules visually and read back exactly when a crontab expression will run.
crontabsheet.com
Convert between Unix epoch timestamps and human-readable dates in any time zone, in both directions.
epochtime.tools
Work out network and broadcast addresses, host ranges and subnet sizes from CIDR notation.
cidrcalculator.net
Calculate subnet masks, host counts and address ranges, with worked examples and code snippets.
subnetmaskcalc.net
Generate barcodes and QR codes in many formats and export them print-ready as PNG or PDF, all local.
barcodeandqr.com
Strip hidden metadata — EXIF, location, author — from images, PDFs, Office files, audio and video, in-browser.
removemetadata.tools
Merge, split, compress, rotate and password-protect PDFs client-side — documents never leave your device.
corepdftools.com
Convert color codes between HEX, RGB, HSL and more, build palettes, and export design tokens.
colorcodekit.com
A toolkit of browser-based image utilities for resizing, converting and editing without uploading.
pictoolkit.com
Count words, characters, sentences and paragraphs and estimate reading time as you type.
wordcounterfree.com
Convert text between upper, lower, title, sentence case and more in one click.
transformcase.com
Repeat, duplicate and generate blocks of text quickly, with control over separators and counts.
textrepeat.net
Convert numbers to words, including Indian-rupee amounts for cheques and invoices.
numtotext.com
A fast reference and converter for length, weight, volume, temperature and more.
unitcheatsheet.com
Add up the hours between start and end times, including overnight spans and breaks, for timesheets.
calculatehours.net
Check the current time across world cities and time zones at a glance, for scheduling calls.
clockwithus.com
Calculate exact age in years, months and days, plus milestones and birthday countdowns.
theagecalculator.net
Test how strong a password is and how long it would take to crack — checked locally, never sent anywhere.
passwordstrength.net
Calorie, macronutrient and body-composition calculators — daily needs, protein, lean body mass.
calorieskit.com
Calculate BMI, BMR and TDEE with adaptive-thermogenesis and macro features beyond the basic formulas.
bmibmrcalc.com
GPA and CGPA across US, Canadian, Indian and Pakistani grading systems, with verified per-university scales.
gpacalculatorhq.com
Add, subtract, multiply and divide fractions with full step-by-step working shown.
fractionsteps.com
Convert and scale cooking measurements — cups, grams, ounces, millilitres — and resize recipes.
measurechef.com
Privacy-first public IP lookup and network diagnostics — IPv4/IPv6, ISP, ASN and reverse DNS, no logging.
checkmyipnow.com
A free, client-side internet speed test for download, upload, ping and jitter — no app, no tracking.
checkinternetspeed.tools
A precision RDAP-first WHOIS, DNS and domain-security lookup for developers, owners and investigators.
whoislookuppro.com
Every tool linked above follows the same three rules: free forever, runs in your browser, no account required. Bookmark whichever ones you actually use — they’re meant to load fast and stay out of your way.
Open the page, use the tool, leave. There’s no account to create, no email gate, no “free trial.”
The tools run entirely in your browser — no server-side processing. Your input is processed locally and stays on your device.
One tool per page, no popups, no upsells, no dark patterns. The page loads, the tool works, that’s it.