Tools starting with D

Dad Joke Machine

Get a never-ending supply of classic dad jokes with puns, wordplay, and eye-rolling goodness.

Daily Panchang Calculator

Calculate the five limbs of Panchang — Tithi, Nakshatra, Yoga, Karana, Vaar — plus Rashi, sunrise/sunset, and auspicious muhurtas for any date.

Daily Word Challenge

Test your vocabulary with a new word puzzle every day. Guess the word from its definition and synonyms to build your streak.

Daily Word Game

Guess the hidden five-letter word in six tries — a fresh daily puzzle, practice mode, streaks, and shareable results.

Dal Protein Calculator

Protein and calories per katori for toor, moong, masoor, chana, urad and mixed dals, against your daily target.

Dark-Pattern Self-Audit

Flag manipulative consent, checkout and cancellation patterns in your own product.

Dashboard Panel Layout Planner

Plan a service dashboard with the RED, USE or Four Golden Signals method: ordered panels, grid widths and starter queries.

Data Breach Exposure Checklist

Step-by-step actions after a breach exposes your email, phone, card, address, date of birth, employer or reused password, ordered by urgency.

Data Deletion Proof Log

Record deletion requests and the system-by-system evidence that each one completed.

Data Lens

Upload CSV files to analyze columns, clean data, detect patterns, and generate smart visual insights.

Data Privacy Request Generator

Write GDPR, DPDP and CCPA data requests: see your data, delete it, correct it, move it to another service, or opt out of marketing.

Data Rate Bitrate Converter

Convert between Mbps, kbps, MB/s and GB per hour, and turn any bitrate into the file size it produces.

Data Retention Schedule Builder

Define review and deletion periods for each of your data categories.

Data Structure Visualizer

Visualize arrays, linked lists, stacks, queues, binary trees, and graphs with interactive operations and real-time state updates.

Database Connection String Builder

Build a database connection URI for Postgres, MySQL, MongoDB, Redis and more — with the right scheme and default port.

Database Naming Convention Generator

Define table, column, index and constraint naming rules with worked examples and per-DBMS identifier length checks.

Dataset Class Balance Checker

Check label distribution in a classification dataset: imbalance ratio, entropy, balanced class weights and resampling counts.

Dataset Train Test Splitter

Split a JSONL dataset into train, validation and test sets with a fixed seed for a reproducible, shuffled split.

Date / Time Conversions

Convert between time units, Unix timestamps, and date formats. Calculate date differences and durations with precision.

Date Add Subtract Calculator

Add or subtract days, weeks, months or years from any date and get the exact resulting date.

Day of the Week Calculator

Find what day of the week any date from year 1 to 9999 falls on, with Zeller and Doomsday steps, a weekday counter and a Friday the 13th finder.

Days Between Dates Calculator

Count the days, weeks and months between any two dates.

dB To Percentage Converter

Convert decibels to linear amplitude, power and percentage in both directions, with the 20·log10 and 10·log10 rules shown.

DCA Calculator

Estimate investment growth using Dollar Cost Averaging. Compare weekly, monthly, quarterly, or yearly recurring investments with return scenarios.

Dead-Pixel Screen Test

Locate dead or stuck pixels using full-screen solid color test patterns.

Debt Payoff Calculator

Compare snowball and avalanche debt payoff methods with interest, timeline, and payoff order insights.

Debt to Income Ratio Checker India

Check your EMI load against lender FOIR caps and the 28/36 rule, with the zone you fall in and the EMI headroom left.

Decibel Change Calculator

Turn a decibel change into amplitude, power and perceived-loudness ratios, plus the equivalent distance and source count.

Decimal Converter

Convert between fractions, decimals, percentages, and mixed numbers with instant visual results and step-by-step explanations.

Decision Matrix Tool

Compare options with weighted criteria, live scoring, rankings, sensitivity analysis, and an exportable decision report.

Decision Wheel

Spin to decide! Weighted random picker, team selector and giveaway wheel with live odds, history and no-repeat draws.

Declutter Planner

Plan a room-by-room decluttering sprint with keep, donate and sell piles, session-by-session timings and a finish date.

Deep Breathing Guide

Guided deep breathing exercises with multiple techniques — 4-7-8, Box Breathing, and Coherence Breathing — to help you relax, focus, and reduce stress.

Deep Cleaning Time Estimator

Estimate the person-hours, elapsed time and crew size needed to deep clean a home of your size, soil level and room count.

Deepfake Awareness Checklist

Score a suspicious video, voice note or call against known deepfake red flags and see which verification steps you still need to run.

Definition of Done Generator

Generate a practical Definition of Done checklist tailored to project type, team size, release cadence, and compliance needs.

Degree Equivalence Explainer

See how Indian qualifications — Class 12, 3-year BA, BTech, MBBS, master's — map to the US, UK, Canada, Australia and Germany.

Dehumidifier Capacity Calculator

Size a dehumidifier in litres per day from room volume, damp severity and humidity, with runtime and running cost.

Deliverable Revision Ledger

Record versions, feedback, approvals and how many included revisions remain.

Delivery Challan Format Generator

Build a Rule 55 delivery challan for goods moved without a sale, with consignment value, e-way bill check and job work return dates.

Demat Account Cost Comparator

Compare the true yearly cost of demat plans across AMC, DP debit charges, brokerage, GST and statutory levies on equity delivery.

Density Calculator

Density from mass and volume, with common unit conversions.

Dependency License Scanner

Review license metadata declared in a local package.json or package-lock.json, including missing fields and cautious text-based review cues.

Dependency Upgrade Impact Estimator

Estimate upgrade risk from package dependency version changes, release distance, and critical package signals.

Dependency Vulnerability Lookup

Query exact package versions against the official OSV API through a bounded same-origin endpoint with explicit network and coverage limitations.

Deployment Window Timezone Planner

Find a release window that dodges business and peak hours in every region you serve, hour by hour across UTC.

Deposit Insurance Coverage Checker

Check how much of your bank balances DICGC insures, grouped by bank and by the capacity in which each account is held.

Deprecation Timeline Planner

Plan announce, warn, brownout and removal dates for a deprecation, with ready-to-send comms templates.

Depth of Field Estimator

A practical photography tool for managing depth of field workflows efficiently.

Design & Image Prompt Builder

Build AI image and design prompts for Canva AI, Figma AI, YouTube thumbnails and product photography.

Design Compare

Compare two UI designs or images with side-by-side, overlay, slider, zoom, grid, and download controls.

Design Critique Checklist

Run a structured design critique with a timed agenda, artefact-specific prompts and a vague-feedback checker.

Design Handoff Checklist Generator

Build a design-to-development handoff checklist for your platform and features, then score how ready the handoff really is.

Desk Stretch Routine Generator

Build a guided desk stretch routine for the time you have, then follow it with timed holds and audio cues.

Dev Onboarding Runbook Generator

Build a day-one developer setup runbook with real install commands, access requests, repo clones and a first task.

Devanagari Transliteration Keyboard

Transliterate live between Roman Hindi and Devanagari as you type.

Developer Portfolio Readme Generator

Generate a GitHub profile README with skill badges, project cards, stats widgets and contact links.

Developer Reference Explorer

Searchable reference for HTTP headers, common port numbers, process exit codes and Linux signals.

Device & Browser Dashboard

Client-side dashboard for device, browser, privacy, GPU, storage, and web API capability analysis.

Device Sensor Calibration Checker

Sanity-check the bias in your device's accelerometer and gyroscope.

Diabetes Management Dashboard

Monitor your blood glucose readings, track your lifestyle habits, and estimate your HbA1c.

Diabetic Foot Check Reminder

Daily diabetic foot inspection checklist with zone notes, red-flag alerts and a risk-based professional review date.

Diagram Practice Tracker

Track which exam diagrams you can draw from memory within your time limit and see which ones to practise next.

Dice Roller

Roll d4 to d100 dice with modifiers, fair crypto randomness, running stats, and a full roll history.

Dictionary App

Provides definitions and translations for words

Diff Checker

Compare two files and highlight the differences

DigiLocker Consent Scope Translator

Translate explicitly labeled requester, document, field, purpose, duration, frequency, retention and revocation details from pasted consent JSON or text without accessing an account.

Digit Span Test

Measure your short-term working memory capacity with standard forward and reverse digit span tests.

Digital Arrest Emergency Assistant

Follow a calm, official-guidance checklist and prepare a local evidence-preservation pack for a suspected digital-arrest incident without uploads, calls, or payments.

Digital Compass

Show heading and bearing from your device's magnetometer where supported.

Digital Detox Study Planner

Plan phone-free study blocks that escalate day by day, with a cap, milestone day and total phone-free hours computed.

Digital Legacy Vault

Organize emergency instructions and important records for trusted family handoff.

Digital Level & Inclinometer

Measure tilt and slope using your device's orientation sensor where supported.

Digital Wallet Manager

Total every asset you hold, see each holding's share of the wallet, and score how concentrated the whole portfolio is.

Dilution & Molarity Calculator

Calculate dilution concentrations and volumes with C1V1 = C2V2, or find molarity from a solute's mass and molar mass.

Dimensional Consistency Checker

Compare the base-dimension exponents on each side of an equation to flag mismatched, dimensionally invalid terms.

Dining Table Size Calculator

Size a rectangular, round or square dining table from seat count, then check chair clearance against your room.

Dino Dash Runner

Endless runner game online free — jump and duck past obstacles as the speed keeps climbing.

Dinosaur Explorer

Explore 20 dinosaur species with search, filter, timeline view, size comparison, and detailed cards.

Discount and Cascading Discount Calculator

Stack successive discounts, a flat coupon and tax to get the true effective discount, final price and total saved.

Discount and Final Price Calculator

Apply single or stacked percentage and flat discounts, add GST, and see the true saving and equivalent single discount.

Discount Calculator

Calculate sales savings. Tweak discount rates, stacked discounts (e.g. 20% + 10%), tax additions, and view dynamic financial breakdowns.

Discount Stacking Calculator

Stack sale prices, coupons, card offers, shipping, tax and cashback in the order shops apply them and see the real cost of the basket.

Display Calibration Checklist

Workflow-specific calibration targets and a step-by-step checklist for web, print, Rec.709 video and HDR displays.

Disposable Email Policy Explainer

Scores the lockout risk of a signup and shows when a throwaway address is safe and when it will cost you the account.

Distraction Log For Students

Log every distraction in a study session, find your top three triggers and estimate how much study time they cost you.

Dividend Income Tax Calculator India

Tax on Indian dividend income at your slab rate, with the 20% interest deduction cap under section 57 and section 194 TDS credit.

Dividend Yield Calculator

Calculate dividend yield, dividend income, tax-adjusted cash flow, and portfolio required for target income.

Diwali Poster Generator

Make Diwali sale and greeting posters in warm festive palettes, with the discount maths and WCAG contrast checked.

DIY Tool Kit Builder

Turns the jobs you plan to do into a phased tool list and budget, with a buy-or-hire test on every expensive item.

DJ Transition Length Calculator

Work out how long a blend runs in bars, beats and seconds when the two tracks sit at different tempos.

DLT SMS Sender ID Explainer

Explain documented Indian commercial SMS header, prefix and category-suffix formats locally without claiming sender authenticity or live DLT registration.

DNA Double Helix Explorer

Interactive 3D rotating DNA double helix model with base pairing (A-T, G-C), hydrogen bond counting, and replication mechanics.

DND and Spam Call Control Guide

Build your 1909 DND preference command, classify a spam caller's number series and check whether you are still inside the TRAI complaint window.

DNS Propagation Checker

Compare a DNS record across multiple global resolvers to track propagation.

DNS Record Generator

Generate correctly formatted A, AAAA, CNAME, TXT, SRV and ALIAS zone-file records with full syntax validation.

DNS TTL Strategy Planner

Pick steady-state TTLs per record type and get a timed lower-cutover-restore plan for zero-surprise DNS migrations.

Do Not Sell Link Text Generator

Generate the statutory opt-out link label, footer wording and landing page copy required by the CCPA as amended by the CPRA.

Docker Healthcheck Generator

Generate Dockerfile HEALTHCHECK and compose healthcheck blocks with tuned interval, timeout, retries and start period.

Docker Network Mode Explainer

Compare Docker bridge, host, none, container and macvlan network modes and see exactly how your container is reached.

Docker Tag Naming Convention Builder

Design a Docker image tagging scheme from semver, git sha, branch and date parts, validated against the OCI reference rules.

Docker Volume Mount Planner

Plan bind mounts, named volumes and tmpfs mounts with correct -v, --mount and Compose syntax, read-only flags and propagation.

Dockerfile Security Linter

Lint a pasted Dockerfile locally for risky build patterns, root runtime cues, floating bases, embedded secrets, broad copies, and missing health checks.

Dockerignore Generator

Create a .dockerignore tailored to your stack to shrink the build context and speed up docker build.

Doctor Visit Question Builder

Turn a messy list of worries into a SOCRATES symptom summary and a prioritised question list that actually fits the appointment.

Document Attestation Tracker

Track which documents are attested, by whom and when — with validity countdowns that flag expiring and expired attestations.

Document Backup Priority Ranker

Rank which household documents to scan and back up first, by how hard each one is to replace, how fast you would need it and what it unlocks.

Document Checklist Generator

Generate ready-to-use document checklists for visa, job, loan, rental, admission, KYC, and business workflows.

Document Expiry Tracker

Track passport, visa, certificate, and licence expiry dates.

Document Verification Tracker

Track every document your DV stage needs, its status and days left, with critical gaps flagged first.

Document Version Timeline

Convert document changelog notes into a clean timeline of versions, owners, dates, and change themes.

Document Version Verifier

Enterprise-grade, privacy-first document version comparison & verification tool. Compare PDF, DOCX, TXT, JSON, CSV, HTML, XML & Markdown locally with metadata analysis, tampering detection, visual diffs, and AI insights.

Domain Checker

Check if a domain is available or not

Domain Expiry and Renewal Planner

Dates every stage of the gTLD expiry lifecycle — grace, redemption, pending delete and drop — plus transfer locks and renewal risks.

Domain Expiry Radar

Track domain expiry and renewal windows using RDAP registration data.

Domain Name Ideas Generator

Generate fresh name ideas from a keyword.

Domicile and Residence Proof Checklist

Build the document checklist for a domicile or residence certificate, test the continuous residence period and track how ready your file is.

Donation Receipt Format Generator

Generate an 80G-ready donation receipt with donor details, amount in words, registration numbers and the deduction worked out.

Door Frame Material Calculator

Frame timber running length and cft, shutter size and area, hinges and holdfasts for any door opening.

Dot Grid Background Generator

Generate dot, line, isometric and graph-paper grid backgrounds with ink coverage figures, CSS and SVG export.

DOTS Score Calculator

Turn a powerlifting total into a DOTS score, the modern bodyweight-adjusted coefficient that replaced Wilks in many federations.

Double Pendulum Chaos Simulator

Real-time chaos theory visualization with interactive double pendulum physics and glowing motion trails.

Doubt Resolution Log

Log every study doubt, who resolved it and whether you retested yourself, with resolution-time and retest-rate stats.

Dough Hydration Calculator

Baker's percentage calculator for bread and pizza — hydration, salt, yeast or sourdough starter, with recipe scaling.

Download Your Data Guide

How to request and read your data export from Google, Apple, Meta, Amazon, LinkedIn, dating, food delivery, ride, music, health and gaming apps.

DPDP Consent Notice Checker

Inspect a consent notice for completeness against a versioned India DPDP checklist.

DPIA Starter Wizard

Score a new feature's privacy risk and outline the structure of a Data Protection Impact Assessment (DPIA).

Dream Pattern Journal

Privately tag dreams and review recurring themes over time.

Dream Vacation Finder

Answer a few questions and discover your perfect vacation destination — from tropical beaches to mountain escapes, and everything in between.

Drinking Game Picker

Pick random drinking games and challenges with categories, penalty mode, and history tracking.

Dripping Tap Water Loss Calculator

Turn drips per minute into litres and rupees lost per day, month and year — including the geyser units a hot tap leak burns.

Driver Salary Calculator

Work out a driver's monthly pay with overtime at twice the ordinary rate, night duty, outstation days, PF and ESI.

Driveway Sealer Calculator

Calculate gallons, litres and 5-gallon pails of driveway sealer for your area, surface condition and number of coats.

Driving Break Planner

Plan rest stops, fuel halts and a realistic arrival time for a long drive using the 15-minute break every two hours rule.

Driving Licence Renewal Checklist

Build a document checklist, fee estimate and new validity date for renewing an Indian driving licence under the Motor Vehicles Act.

Driving Rules Abroad Explainer

Speed limits, licence and IDP rules, fines, alcohol limits and road signs for Indians driving in the USA, UAE, Australia, Germany, Italy, Spain, Switzerland, Japan, Thailand and Vietnam.

Dry Eye Blink Trainer

Measure your blink rate, compare it with the 15-20 blinks a minute seen at rest, and build a paced complete-blink drill for screen work.

DSAR Request Tracker

Manage data-access requests with their deadlines, responses and supporting evidence.

Dumbbell to Barbell Load Converter

Estimate equivalent dumbbell and barbell loads per exercise, with a realistic range and rounding to the dumbbells you own.

Duolingo English Test Converter

Map Duolingo English Test scores (10-160) to IELTS bands, CEFR levels and derived TOEFL iBT ranges using published concordances.

Duplicate Image Finder

Find exact and near-duplicate images using perceptual hashing. Supports batch upload, similarity scoring, and group management.

Duplicate Line Remover

Identify and remove duplicate lines from lists, code, or logs with custom case-sensitivity and whitespace settings.

Duplicate Marksheet Request Helper

Draft a duplicate marksheet application with a reason-specific affidavit and document checklist for lost, stolen or damaged marksheets.

Duration Calculator

Turn a number of seconds into a human-readable duration.

Dwell-Click Keyboard

Click and type using pointer dwell time alone, with no button press needed.

Dyslexia Friendly Text Preview

Preview line height, letter and word spacing and measure against WCAG 1.4.12 and British Dyslexia Association guidance.