Tools we use, free for you.
A curated set of browser-based utilities for calculation, encoding, image work, formatting, and text. No signups, no upsells, no nonsense — just the tool, doing the thing.
Calculators & Math
28 toolsSquare Footage Calculator
Calculate room and floor area in square feet, square meters, or square yards. Multi-shape support.
Percentage Calculator
Compute percentages, percent change, percent of a number, and reverse percentage problems.
Age Calculator
Calculate exact age in years, months, and days. Works for any date — past, present, future.
Hours Calculator
Add, subtract, and calculate hours and minutes. Useful for timesheets and time tracking.
Dim Weight Calculator
Dedicated dimensional weight calculator for carriers. Companion to our shipping tool.
Unit Cheat Sheet
Quick reference for unit conversions across distance, weight, volume, temperature, and more.
Margin vs Markup
Convert between profit margin and markup, find break-even, and factor in platform fees, shipping, and tax.
Girth Calculator
Parcel length-plus-girth against carrier size limits, plus body circumference measurements for fitness tracking.
ProSolarCalc
Free, unbiased solar and off-grid calculators — system sizing, savings and payback, and battery banks.
EMI Calculator (India)
EMI for home, car, and personal loans in India, with a full amortization schedule and prepayment impact.
Total Interest Calculator
Total interest paid over the life of a loan, comparing terms and rates with a full amortization breakdown.
SIP Calculator
Project mutual-fund SIP returns, step-up SIPs, and goal-based investing, with maturity value and charts.
GPA Calculator
Compute semester and cumulative GPA on 4.0 and weighted scales, converting letter grades and percentages.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step working, simplification, and decimals.
Calorie Calculator
Estimate daily calorie needs, TDEE, and macros — BMR-based targets for loss, maintenance, or gain.
BMI & BMR Calculator
Calculate BMI, BMR, and daily calorie needs in metric or imperial, with healthy-weight ranges.
AC Tonnage Calculator
Size an air conditioner by room area, climate, and occupancy — BTU and tonnage estimates for any space.
Tank Volume Calculator
Volume and fill level for cylindrical, rectangular, and oval tanks — horizontal or vertical, litres or gallons.
Cubic Yardage Calculator
Cubic yards for concrete, mulch, gravel, soil, and sand from your dimensions in any units.
Pool Volume Calculator
Pool volume in gallons or litres for rectangular, round, and oval pools, with dosing help for chemicals.
Concrete Material Calculator
Concrete volume plus cement, sand, and aggregate quantities — slabs, footings, and bags by mix ratio.
Roofing Material Calculator
Roofing squares, shingle bundles, and underlayment from area and pitch, with a waste factor built in.
Stair Calculator
Stair rise, run, stringer length, and headroom to code, with a diagram for carpentry and deck building.
Construction Calculators
A hub of construction calculators — concrete, framing, drywall, paint, and more, with material estimates.
Voltage Drop Calculator
Voltage drop and correct wire size for AC and DC circuits, with NEC and IEC formulas.
Solar Battery Bank Calculator
Size an off-grid battery bank from daily load, autonomy days, and depth of discharge, with lithium presets.
Backup Power Calculator
Estimate UPS and generator runtime from load and battery capacity, for home, office, and server racks.
Cooking Measurement Converter
Convert cooking measurements between cups, grams, ounces, and millilitres, with recipe scaling.
Developer Tools
14 toolsBase64 Encoder / Decoder
Encode and decode text or files to and from Base64. Supports image uploads and binary data.
URL Encode / Decode
Encode and decode URL components. Handles percent-encoding for special characters cleanly.
UUID Generator
Generate UUIDs (v1, v4, v5) one at a time or in bulk. Copy with a single click.
JSON Tools
Format, validate, minify, and compare JSON. Built-in syntax checking and error highlighting.
Hash Generator
Compute MD5, SHA-1, SHA-256, SHA-512 hashes for text or files. All in-browser.
Crontab Sheet
Build and interpret cron expressions. Visual editor with human-readable explanations.
Regex Guide & Tester
Build, test, and debug regular expressions. Includes a syntax reference for major flavors.
CIDR Calculator
Calculate, split, and visualize subnets. IPv4/IPv6, VLSM planner, cloud-aware reserved IPs, and Terraform export.
Subnet Mask Calculator
Network and broadcast addresses, usable host range, wildcard masks, and VLSM planning for IPv4 and IPv6.
Color Code Kit
Convert between HEX, RGB, HSL, and CMYK, build palettes, check contrast, and copy ready-to-paste CSS.
Barcode & QR Generator
Generate QR codes and barcodes (Code 128, EAN, UPC), downloadable as PNG or SVG for print and labels.
Internet Speed Test
Test download, upload, ping, and jitter right in the browser — quick, accurate, no app to install.
What Is My IP
See your public IPv4 and IPv6 address, ISP, and approximate location, plus request headers.
WHOIS Lookup
Look up domain WHOIS, registrar, name servers, expiry dates, and DNS records for any domain.
Time & Date
2 toolsText & Strings
5 toolsWord Counter
Count words, characters, sentences, paragraphs. Reading-time estimate included.
Text Repeat
Repeat any text or string N times. Useful for testing, dummy content, and patterns.
Transform Case
Convert text between upper, lower, title, snake, kebab, camel, and constant case.
Password Strength
Test password strength and estimated crack time. All checks happen locally in your browser.
Number to Words
Convert numbers to words for cheques, invoices, and legal documents, with currency wording support.
Images & Media
3 toolspictoolkit
35+ browser-based image tools — compress, convert, resize, crop, HEIC to JPG, favicon generator, and more. Files never leave your device.
Remove Metadata
Strip EXIF, GPS, and hidden metadata from images, PDFs, and Office files — locally in your browser.
PDF Tools
Merge, split, compress, convert, and rotate PDFs in your browser — no uploads, files stay on your device.
Same philosophy, every tool.
The calculators and utilities themselves run entirely in your browser — your inputs and results stay on your device, never sent to a server. To keep the network free, we use Google Analytics for traffic measurement and show ads through Google AdSense and Adsterra. No signups, no accounts, no upsells. See our privacy policy for details.