Tools starting with H

Habit Cost Calculator

Calculate the cost of your habits and make informed decisions.

Haiku Prompt Generator

Get a real seasonal kigo, a juxtaposition to build on and a suggested cut point, plus a live 5-7-5 syllable check on your draft.

Haiku Syllable Checker

Check a three-line haiku draft against the 5-7-5 pattern and collect rewrite notes.

Hair Care Guide

Get personalized hair care routines.

Hair Color Preview

Preview 16 hair colors on your photo instantly. Try natural shades, warm tones, blondes, fashion colors, and highlights with realistic in-browser simulation.

Hair Growth Calculator

Log dated hair length measurements, get your real growth rate in cm per month after trims, and project when you will reach a target length.

Hair Style Preview

Try on different hairstyles with AI-powered face detection. Preview short, medium, and long hairstyles with various colors and adjustments.

Hand Gesture Meaning Warning Guide

Check which everyday hand gestures change meaning or turn offensive across countries, with a safer alternative for each.

Handwriting Slant Guide Generator

Generate printable slant-line underlays at Copperplate, Spencerian, italic or custom angles to fix inconsistent handwriting slope.

Handwriting Speed Tracker

Time a copy task, convert it to words and letters per minute, check it against an exam word target and track the trend session by session.

Hangman Word Game

Guess the hidden word letter by letter in this free hangman game with categories and hints.

HAR Privacy Sanitizer

Remove sensitive headers, cookies, query parameters, and request or response bodies from a HAR file locally before sharing it.

Hardware Capability Fingerprint Viewer

See the CPU count, memory bucket, touch points and input capabilities any website can read from your device.

Hardware Size Selector

Pick the right drill bit, nail or wood screw size for the material and job, with metric and imperial sizes.

Harry Potter Pencil Writer

Transform your ordinary words into magical enchantments with customizable spell-binding fonts and magical glow effects.

Hashing vs Encryption Explainer

Run one input through a real SHA-256 hash, a reversible cipher and Base64 side by side to see why a hash is not encryption.

Hashtag Hustle Magic

Generate highly engaging and viral hashtags for your social media posts.

Hashtag Mix Balancer

Sort hashtags into mega, large, niche and micro tiers by post volume and build a balanced set sized for your account.

Hashtag Set Organizer

Futuristic social media hashtag planner & marketing dashboard.

HbA1c Goal Progress Tracker

Chart HbA1c results over time against your agreed target, convert between % and mmol/mol, and see estimated average glucose.

HbA1c to Average Glucose Converter

Convert HbA1c between DCCT percent, IFCC mmol/mol and estimated average glucose in mg/dL and mmol/L using the ADAG equation.

HDR Vs SDR Brightness Explainer

Convert nits to PQ and HLG code values, see the headroom above reference white and why untone-mapped HDR looks flat on SDR.

Heading Hierarchy Preview

Build an H1 to H6 type scale with size, line height, weight and spacing, preview it live and copy the CSS.

Headphone Balance Test

Alternate a hard-panned tone between channels to check stereo placement and balance.

Headphone Listening Break Timer

Alternating listen and rest timer for long headphone sessions, with a break schedule and how much of the daily sound allowance you use.

Health Checkup Reminder Planner

Plan reminders for dentist visits, eye checkups, yearly flu shots and prostate screening based on age and last visit.

Health Cost Per Use Calculator

Work out the real cost per gym visit, per medication dose and per supplement serving to compare plans and packs.

Health Log

Private logs for blood pressure, blood sugar, a child's fever, breastfeeding sessions, hair fall, myopia, period pain and snoring, saved on your device and exportable for your doctor.

Health Pre

Predict potential health conditions based on your symptoms with our AI-powered health analysis tool.

Hearing Aid Notes Tracker

Log which hearing aid programme you used in each listening situation, rate clarity and comfort, and see what works.

Hearing Test

Free online hearing test: find your highest audible frequency with an 8–20 kHz sweep and compare left and right ears from 250 Hz to 8 kHz.

Heart Disease Risk Calculator

Educational estimates of coronary artery disease, stroke, atrial fibrillation and lipid-related risk from common factors. Not a diagnosis.

Heart Rate Recovery Calculator

One and two minute post-exercise heart rate recovery with clinical thresholds and a fitness band.

Heart Rate Training Zones

Find your max heart rate and five training zones in real bpm, using Tanaka or Karvonen, with the zone to actually train in.

Heart Rate Zones Calculator

Calculate your maximum heart rate and target training zones for optimal fitness results.

Hedge Spacing Calculator

Work out how many hedging plants a run needs from its length, the species spacing and single or double staggered rows.

HEIC to JPG Converter

Convert Apple HEIC/HEIF images into standard JPG or PNG files locally in your web browser. Supports batch conversions, custom image quality, and ZIP exports.

Height Weight Ratio For Recruitment

Check whether your weight sits inside the height band and BMI range used by Army, SSC GD and police physical standards.

Helmet Size Finder

Find your helmet size from head circumference, flag borderline fits and identify your head shape from the cephalic index.

Herb Garden Spacing Planner

Plan a kitchen herb bed: spacing between plants, how many fit, pot depth, sun hours and which herbs to keep apart.

Hex Calculator

Add, subtract, multiply and divide hexadecimal numbers, apply AND, OR, XOR and shifts, convert hex to decimal, binary and octal, with carry steps.

Hex to Base64

Convert hexadecimal strings into Base64 and back.

Hex To CMYK Converter

Convert web hex colours to CMYK percentages and check total ink coverage against common press limits.

Hexadecimal Converter

Convert between hexadecimal, decimal, and binary formats instantly with color-coded nibble visualization and bit-level breakdown.

Hidden Revision Inspector

Inspect local OOXML packages for generic revision, comment, metadata, hidden-structure, macro, embedded-file, and external-link evidence.

Hidden Talent Finder

Discover your unique and quirky hidden talent based on your name and birth month.

Hidden Unicode & Homograph Scanner

Detect invisible controls and deceptive look-alike characters.

High-Contrast Document Recolor

Recolor scanned documents into high-contrast, accessible color palettes.

Highway vs City Mileage Estimator

Blend city and highway km/l into a true combined mileage using the harmonic fuel-weighted formula, plus monthly litres and cost.

HIIT & Tabata Timer

Interval timer for HIIT, Tabata, EMOM, and boxing rounds with audio cues, sets, and drift-free timing.

Hindi Job Application Letter

Generate a formal Hindi job application letter in correct patra format, with age on the cut-off date and relaxation checked.

Hindi Muhavare Explorer

Browse Hindi muhavare with literal sense, real meaning, usage sentences, exam-level tags and a built-in meaning quiz.

Hindi Patra Lekhan Format Guide

Interactive guide to aupcharik and anaupcharik Hindi letter formats with correct sambodhan, vishay and samapan for each type.

Hindi School Leave Application

Generate a correctly formatted Hindi prarthna patra for school leave, with गा/गी gender agreement and an inclusive day count.

Hindi Varnamala

Learn Hindi Varnamala interactively with visuals and pronunciation.

Hinglish Coding Dictionary

Learn 40 core coding concepts explained three ways: precise English, everyday Hinglish, and an analogy — with a quiz.

Hinglish Glossary Builder

Build a Hinglish and Indian English glossary with meanings, examples and origins, then export it as Markdown, CSV or JSON.

Home Affordability Calculator

Find the maximum property price you can afford from your income, EMI capacity, down payment, LTV cap and registration costs.

Home Air Filter Reminder

Work out when each air purifier or AC filter is actually due, date the next change, and add up the yearly filter and electricity cost.

Home Battery TOU Simulator

Compare home battery charge and discharge scenarios against your tariffs and load profile.

Home Finish Cost Comparison

Compare emulsion and distemper paint, vitrified and ceramic tiles, and work out paint cost per square foot in India.

Home Heat-Loss & Retrofit Estimator

Compare insulation retrofit scenarios using your room dimensions and current insulation.

Home Insurance Inventory

Record household assets, serial numbers, photos, and replacement values.

Home Loan Eligibility Calculator

Estimate home loan eligibility from income, existing EMIs, tenure and age using FOIR limits and RBI loan-to-value ceilings.

Home Loan Prepayment Calculator

Find the interest saved and tenure cut when you make a lump-sum prepayment or pay extra with every EMI.

Home Loan Tax Benefit Calculator

Combined Section 80C principal and Section 24(b) interest tax savings on a home loan, year by year.

Home Maintenance Scheduler

Plan home maintenance tasks with due dates, frequency, priorities, and monthly scheduling.

Home Office Desk Setup Calculator

Get ergonomic seat, desk, standing-desk and monitor heights for your body height, plus footrest and riser needs.

Home Recycling Impact Calculator

Turn what your household recycles each week into energy saved, water saved, CO2 avoided and waste kept out of landfill.

Home Renovation Budget Planner

Build a room-by-room renovation budget with a quality tier, professional fees, GST on works contracts and a contingency buffer.

Home Service Cost Estimator

Estimate what handyman jobs, house cleaning, car detailing, bike servicing, balcony grills, AC copper piping, water tankers, PNG connections and debris removal cost in India.

Home State Quota Explainer

See whether you get Home State, Other State or All India quota at NITs, IITs, NEET UG and state CET counselling.

Homework Help Guardrail Prompt

Generate an AI helper prompt that coaches a student through homework without writing the submittable answer for them.

Homophone Confusion Checker

Scans your text for 32 high-confidence homophone errors and flags every word from 41 confusable sets for a second read.

Hoodie Print Placement Guide

Print areas and placement measurements for hoodies — chest, back, sleeve and hood — with the kangaroo pocket seam accounted for.

Hook Retention Timing Planner

Turn a short video length into a frame-accurate hook beat sheet built around each platform's view, skip and completion thresholds.

Horoscope Reader

Read daily horoscope insights tailored to your zodiac sign.

Hospital Bag Checklist Builder

Build a delivery-day hospital bag list for mother, baby and birth partner, with quantities scaled to your expected stay.

Hostel Vs PG Cost Comparator

Compare the true monthly cost of a hostel against a PG — rent, food, utilities, travel and one-time charges over your stay.

Hourly to Salary Calculator

Convert an hourly wage into daily, weekly, monthly and yearly pay.

House Rent Allowance for Government Staff

7th Pay Commission HRA for central government employees by X, Y or Z city class, with the DA-linked rate and the section 10(13A) exemption.

Household Budget Planner India

Plan a rupee household budget across rent, EMI, groceries and savings, with 50/30/20 and FOIR ratio checks.

Household Electricity Bill

Calculate your household electricity bill

Housing Society Letter Generator

Write letters to your housing society, builder, landlord or utility: NOC, possession certificate, renovation and sublet permission, parking disputes, water leakage and electricity complaints.

How Lucky Are You? Fortune Quiz

Take our free luck quiz to find out how lucky you really are. Answer 10 fun questions and discover your luck score with this entertaining online fortune quiz.

HP to kW Converter

Convert horsepower, brake horsepower, metric PS, kilowatts and BTU/h, with drivetrain loss and power-to-weight.

HPV Vaccine Schedule Planner

Work out whether an HPV series needs two or three doses from the age at dose one, with recommended dates and minimum intervals.

HR Register Format Generator

Generate printable attendance, leave and overtime register formats for shops, offices and small businesses.

HRA Exemption Calculator

Find your exempt and taxable HRA with the three-rule method, metro limits, and the tax you save at your slab.

HRV Readiness Trend Tracker

Track your personal HRV baseline and how far each morning deviates from it.

HSA Contribution and Tax Saving Calculator

IRS HSA contribution limits with age 55 catch-up, month-by-month proration and the triple tax benefit estimate.

HSN Code GST Rate Finder

Search HSN and SAC codes for common goods and services, see the GST slab and split any amount into CGST, SGST or IGST.

HTAccess to NGINX

Convert common Apache rewrite rules into starter NGINX rewrites.

HTML Editor

Format, minify, escape, and unescape HTML fragments.

HTML Email Checker

Audit email HTML for client compatibility, accessibility, spam risk and performance with a live preview and deterministic rule-based scoring.

HTML Table Generator

Create HTML tables with custom row/column layouts. Tweak designs, edit table cells directly, and copy clean markup/CSS code.

HTML to Code Converter

Convert HTML markup into a JavaScript, PHP, JSP, Perl or VB.NET string you can paste into code, with quotes and line breaks escaped.

HTML to Markdown Converter

Convert HTML into clean Markdown with GFM tables, links, images, and code blocks.

HTML to Text Email Converter

Convert HTML emails into clean, readable plain text for multipart sends — links become Text (URL), lists and tables stay readable, tracking pixels and hidden elements are stripped, all in your browser.

HTTP Status Code Explainer

Understand HTTP status codes with simple, clear explanations instantly.

Human Anatomy Explorer

Explore the human body with an interactive diagram. Click on organs to learn about their functions, systems, and fascinating facts.

Human Heart Pump Simulator

Interactive cardiovascular heart pump simulator with cardiac cycle beating animations, 4 chambers, valves, and systemic vs pulmonary blood flow.

Human Life Value Calculator

Economic value of your future earnings for life insurance planning, with growth, discount rate, loans and existing cover.

Hydration Planner

Plan how much to drink and when on a flight, in an air-conditioned office, in the monsoon, while studying, or for kids and seniors, with reminders.