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ishareu.cn

Free collection of practical home improvement calculators for materials like paint, concrete, flooring, and tile.

jwt.io

JWT.io is the canonical JSON Web Token decoder and debugger from Auth0, with library references for every language.

jsontotable.org

JSON to Table Converter is hosted at jsontotable.org and offers online tools for converting various data formats into tables, such as JSON to CSV and Base64 to HTML.

jsonformatter.org

jsonformatter.org hosts online tools for working with JSON data, including a Base64 to JSON converter.

jsonlint.com

JSONLint is a long-running browser-based JSON validator and reformatter.

jadealmanac.com

Free browser-based Four Pillars and BaZi calculator for Chinese astrology.

jstools.space

Free, privacy-first browser-based developer utilities for code formatting, JSON manipulation, data encoding, and test fixture generation with no external data transmission.

jensonusa.com

Jenson USA offers practical tools for cyclists, including a Bike Size Calculator and a Bike Fit Calculator to help with maintenance and performance.

jouleio.com

Free energy calculators for solar savings, EV charging, electricity bills, carbon footprint, and household energy.

kbe-elektrotechnik.com

kbe-elektrotechnik.com hosts a useful tool for electrical professionals, offering an AWG to Mm2 Electrical Converter to help with cable sizing calculations.

kff.org

KFF (Kaiser Family Foundation) hosts Biden’s Vaccine Plan Calculator and other tools to explore healthcare policy options and impacts.

kamnevapps.com

Browser-based image, document, and utility tools that process files locally without uploads or accounts.

kapwing.com

Kapwing.com hosts a suite of online tools for creating graphics and videos, including a Banner Size Calculator to help determine optimal dimensions for various types of banners.

kegerators.com

Kegerators.com is a site that hosts tools related to beer and party planning. Their Beer Pong Calculator helps determine the best team composition for a game.

kickresume.com

Kickresume.com hosts Before/After Transformer and similar tools to help users compare and contrast images side by side for design, photography, and other creative projects.

kijanix.com

Kijanix offers construction cost calculators with real pricing data and site measurement tools for homeowners.

kitset.app

kivtools.com

Local-first browser-based developer utilities for JSON, APIs, code formatting, and DevOps operations.

kloud9it.com

Kloud9 IT provides a Backup Recovery Time Calculator tool to help estimate how long it will take to recover data from a backup.

knowledgesharingplatform.com

Knowledge Sharing Platform is a website that hosts various online tools to simplify complex calculations and conversions. Currently, it offers a Bearing to Azimuth Angle Converter to help users easily convert bearing measurements into azimuth angles for navigation and construction purposes.

kodytools.com

kodytools.com hosts 13 useful online calculators and converters for various needs, including cost calculations, unit conversions, and more.

kylesconverter.com

Kyle's Converter is kylesconverter.com hosts a variety of conversion tools for everyday use, including BTU to kWh, Attohertz to Hertz, and Barrel Beer to Gallons conversions.

lcm-calculator.com

LCM Calculator offers free online math calculators covering LCM, HCF/GCF, and related tools. ([lcm-calculator.com](https://www.lcm-calculator.com/associative-property-calculator))

lfgitignore.com

LFGitignore is a free service from the Ludovic Frank group focused on generating .gitignore files. ([lfgitignore.com](https://lfgitignore.com/en/?utm_source=openai))

lambdatest.com

LambdaTest provides testing infrastructure plus a large set of free browser-based developer utilities for encoding, formatting, and data conversion tasks.

landajob.cc

Free salary calculator based on real job posting data with no signup required.

landsurveyorsunited.com

Land Surveyors United is an established community and resource hub for surveying professionals, students, and geospatial practitioners, including practical calculators and field tools.

lastcalculator.com

LastCalculator.com hosts a Planning Calculator Suite, offering tools to help users plan various aspects of their lives.

latestqr.com

Free online QR code generator with customization and multiple format support.

lawnmowingcalculator.com

Estimates lawn mowing costs based on area, services, and difficulty level.

learnmetrics.com

LearnMetrics provides calculators and reference charts related to HVAC, electrical, and energy topics. ([learnmetrics.com](https://learnmetrics.com/wire-gauge-chart-amp-wire-sizes/))

ledgerfilelab.com

Browser-based converter for QuickBooks Web Connect files to spreadsheet formats.

leettranslator.com

Free online leet speak translator that converts English text to 1337 and back in multiple transformation modes.

lembog.com

Lembog Tools is lembog.com hosts a collection of online tools, including an Audiobook Speed Calculator to adjust playback speeds for audiobooks.

letsresizeit.com

levyio.com

Free tax calculator suite for income tax, sales tax, capital gains, self-employment tax, paycheck estimates, and US state planning.

lightcalculator.com

LightCalculator.com hosts a Beam Angle to Coverage Light Converter tool, helping users calculate light coverage based on beam angle for various applications.

localfoodheroes.com

LocalFoodHeroes.com offers online tools to help home cooks and small businesses manage their food production and preparation efficiently, including a Bacon Curing Calculator for anyone looking to make homemade bacon.

localresizer.com

Free privacy-friendly image resizer that processes images locally in your browser without uploading to servers.

longdivcalc.com

Free long division calculator with step-by-step solutions for learning.

lipsum.com

Lipsum.com is the canonical Lorem Ipsum generator, hosting both the placeholder text generator and the historical reference of Cicero's De Finibus Bonorum et Malorum.

lumocalculator.com

LumoCalculator.com hosts a Belt Size Calculator tool for determining proper belt sizes in various applications.

m3u8-tomp4.com

Convert public M3U8 and HLS playlists to MP4 video files directly in your browser.

mcimgart.com

Convert images to Minecraft pixel-art plans with block palettes and build references.

mdapp.co

MDApp is an extensive medical calculator site covering clinical scoring systems, drug dosing, cardiovascular and respiratory assessments, oncology toxicity tools, and geriatric mobility evaluation.

mdcalc.com

MDCalc is a site with 4 health-related calculators including BODE Index, Barthel Index, Benzodiazepine Conversion, and Audit-C for alcohol assessment.

mxtoolbox.com

MX Toolbox provides a comprehensive suite of free DNS, email, and network diagnostic lookups including MX records, blacklist checks, and SMTP tests.

mymarini.com

mymarini.com provides useful tools for women and lifestyle. One sample tool is the Bikini Calculator, which helps with sizing and planning.

makehalftone.com

Browser-based halftone generator for converting photos into print-ready dot patterns.

makerory.com

Free browser-based image tools for conversion, compression, and optimization without software downloads.

malikfurniture.com

Malik Furniture is an online resource that hosts practical tools to help with furniture-related tasks. The site provides a Bed Size Calculator to measure and plan bed dimensions accurately.

markdowntools.io

Free browser-based Markdown editor with cheat sheets, table generator, and document format converters.

markdowntoolsonline.com

Free browser-based toolkit that converts documents between Markdown, PDF, HTML, DOCX, CSV, Excel, and images with complete privacy.

markstream-vue.simonhe.me

Free playground for testing streaming Markdown rendering in AI chat interfaces with support for diagrams, math, code, and HTML.

math-charts.com

Free printable multiplication charts, times tables, and reference materials for students and teachers.

math.tools

Math Tools provides a collection of mathematical utilities and calculators for various needs, including a Babylonian Numbers Converter to explore ancient numeral systems.

mathcalculate.com

MathCalculate.com hosts a Big Number Calculator tool to help with complex mathematical operations involving large numbers.

mathcelebrity.com

mathcelebrity.com hosts an array of math calculators and tools designed to solve complex problems quickly. With features like a Benford's Law Calculator and an Associative Property Calculator, it offers practical solutions for students and professionals alike.

mathcracker.com

mathcracker.com hosts a collection of math tools, including a Bayes' Theorem Calculator and a Row Echelon Form Calculator to help with statistical analysis and linear algebra.

mathda.com

MathDA.com hosts a collection of conversion tools for various units, including time (Au to Light minutes), radiation (Becquerel to Curie), and metric prefixes (Atto to Zepto).