Tools starting with I
118 free online tools on AltFTool start with I, listed alphabetically. Every one is free, needs no sign-up and runs in your browser.
Compare working space gamuts, see what assigning the wrong profile does to each primary, and learn when to convert instead.
Education & ScienceCreate, preview, copy, and export production-ready app icons, favicons, launcher assets, and PWA icons in the browser.
Design & ColorIcon Naming Consistency Checker
Audit a list of icon file names against kebab, snake, camel or Pascal case, catch duplicates and reserved names, and get corrected names.
DeveloperIdeal Body Measurements Calculator
Classic proportion targets for chest, waist, arms, thighs and calves scaled from your wrist using McCallum and Steve Reeves ratios.
Health & FitnessSolve for pressure, volume, amount, or temperature in the ideal gas law (PV = nRT) with automatic unit conversion.
Education & ScienceCompare Devine, Robinson, Miller and Hamwi ideal weights, and get a healthy range tuned to your frame size and height.
Health & FitnessIdentity-Minimizing DSAR Planner
Plan the minimum identity proof needed to verify a privacy request.
Security & PrivacySearch, explore, and learn English idioms with meanings, examples, origins, and quiz mode.
Education & ScienceWork out the fuel, money and CO2 wasted idling at signals and in traffic, and how much switching off would save.
CalculatorsConvert IELTS Listening and Reading raw scores to bands and compute the Overall Band Score with the official rounding rules.
CalculatorsTime IELTS Speaking Parts 1-3 to the real format - 1 minute cue card prep, 2 minute long turn - with practice cue cards included.
ProductivityIELTS Writing Task Word Counter
Count words against the IELTS Task 1 (150) and Task 2 (250) minimums with paragraph and sentence structure analysis.
Text & WritingIllegal Entry Objection Letter
Log landlord entries, test each against the 24-hour notice and 7 am to 8 pm rules, and draft a dated objection letter.
Finance & BusinessCreate beautiful photo collages from your images with customizable layouts and spacings.
Image & VideoCompress images instantly and reduce file size efficiently.
Image & VideoBatch convert images between JPG, PNG, WebP, AVIF, BMP, GIF and ICO in your browser, with quality, resize, background fill and ZIP download.
Image & VideoBuild consistent photo credit lines in wire, magazine, caption and museum styles, plus the matching IPTC metadata fields.
Finance & BusinessCrop your image according to your needs
Image & VideoAdjust brightness, saturation, inversion, grayscale, rotation, and flip on your images.
Image & VideoExplore local JPEG re-encoding residuals with a gain-adjusted heatmap, bounded statistics, and regional measurements without uploading the image or producing an authenticity verdict.
Image & VideoImage File Size Budget Calculator
Set a page weight budget, subtract code and fonts, and see how many images of a given size and format still fit.
CalculatorsFlip, mirror, rotate, straighten, preview, and export images in browser with batch ZIP downloads.
Image & VideoImage Format Converter For Forms
Convert photos and signatures between JPG, JPEG and PNG in the browser, with the exact extension and size portals demand.
ConvertersImage Generation Credit Planner
Plan how many images a credit pack yields, how long it lasts at your volume, and the real cost per image.
CalculatorsExtract and view complete image metadata including EXIF, IPTC, GPS, and file properties.
Design & ColorAdd realistic film grain, vintage noise, and cinematic textures to your photos.
Image & VideoAnalyze image quality with nine professional metrics including sharpness, brightness, contrast, noise, exposure, and histogram analysis.
AI ToolsResize images with custom dimensions, social media presets, fit/crop modes, batch processing, and format export.
Image & VideoCompare image resolution, quality, sharpness, DPI, and compression like a professional. Analyze two images side-by-side with detailed metrics.
Design & ColorPlan a reverse-image audit of your profile photos: which engines can answer your question, which crops to submit, how long it takes.
Security & PrivacyConvert uploaded images into Base64 data URLs for quick embedding.
DeveloperConvert JPG, PNG, and other image formats to high-quality PDF documents. Drag and drop your images to create professional PDFs instantly.
PDF & DocumentsConvert images into engaging videos quickly and easily.
AI ToolsAnswer six questions about an image and get a plain-language checklist of the copyright, licence, model release and trademark clearances your use needs.
Finance & BusinessGenerate a Penrose triangle, impossible rectangle or endless staircase as an SVG, and tune the camera angle to see exactly why the illusion holds — or breaks.
Design & ColorCompute exactly how many more marks you need in remaining exams to reach a target overall percentage, and whether it is still possible.
CalculatorsExperience the famous Gorilla Experiment — test your awareness, see if you spot the unexpected, and share your results.
Education & ScienceInches to Centimetres Bag Converter
Convert bag dimensions between inches and centimetres and check them against a cabin or checked baggage allowance.
ConvertersIncident Severity Matrix Builder
Define SEV levels with impact, response targets and escalation paths, and export a ready-to-publish Markdown severity matrix.
Finance & BusinessIncome Certificate Income Calculator
Aggregate family income the way EWS, OBC non-creamy-layer and state income certificate applications actually require, with the asset tests.
Finance & BusinessCompare India old and new tax regimes with deductions, rebate, surcharge, cess, and slab-wise breakup.
Finance & BusinessIncome Tax Notice Type Explainer
Understand what an income tax notice under section 139(9), 143(1), 143(2), 148 or 245 means, how long you have to reply and what to do next.
Education & ScienceSee exactly how much tax each slab contributes to your total bill, old regime vs new regime, with surcharge and cess.
Finance & BusinessIndia Import Duty & Landed Cost Calculator
Work out the landed cost of bringing goods into India by courier or in baggage — CIF, BCD, Social Welfare Surcharge, IGST and the flat 38.5% baggage rate, line by line.
Finance & BusinessDecode what an Indian vehicle number plate, registration, driving licence number, PAN, IFSC or cheque MICR code says: state, RTO, holder type, bank and branch.
Finance & BusinessIndian English Loanword Finder
Trace 61 everyday English words back to Sanskrit, Hindi, Urdu, Tamil, Malayalam, Telugu, Marathi, Bengali and Odia, with the route, era and how settled each etymology is.
Education & ScienceIndian Festival Colour Palette Generator
Palettes for Diwali, Holi, Onam, Pongal and Durga Puja creatives with tint ramps and WCAG contrast checks.
Design & ColorIndian Festival Greeting Card Maker
Make Diwali, Eid, Pongal, Onam and other festival cards with regional motifs and greetings in 11 Indian languages.
Design & ColorIndian Heritage Monument Explorer
Browse and filter Indian heritage monuments by state, historical era, architectural style and UNESCO World Heritage status.
Education & ScienceFind Indian public holidays, festivals, bank weekends, long weekends, and state-wise holiday planning windows.
LifestyleCheck whether a PAN, GSTIN, TAN, IFSC code, voter ID, vehicle number plate or roll number is in a valid format, with the reason when it is not.
Finance & BusinessConvert an Indian degree percentage into the UK First, 2:1, 2:2 and Third class equivalents UK universities use for admissions.
CalculatorsIndian Mobile Number Validator
Run country code and numbering-series sanity checks on an Indian mobile number.
LifestyleIndian Number Format Converter
Convert between lakh-crore and million-billion notation, with Indian 2-2-3 and international 3-3-3 digit grouping.
ConvertersConvert an Indian percentage or 10-point CGPA to the US 4.0 GPA scale using the division-based method and a linear estimate.
CalculatorsLook up A-series, legal, foolscap, SRA and Indian trade sheet sizes in mm, inches, points and pixels, with an ups-per-sheet check.
Design & ColorExplore proverbs in Bengali (probad), Kannada (gaade), Marathi (mhani), Punjabi (akhaan), Tamil (palamozhi) and Telugu (samethalu) with meanings in English.
Education & ScienceIndian Street Food Calorie Guide
Calorie and macro estimates for pani puri, vada pav, chaat, rolls and momos, with plate totals and share of your daily target.
Health & FitnessIndian Wedding Hashtag Generator
Blend both partners' names into wedding hashtags — portmanteaus, shaadi puns and classic formats — each length-checked for Instagram.
Marketing & SocialIndirect Prompt Injection Scanner
Scan pasted HTML, Markdown, CSV, or text locally for hidden instructions, role markers, data-exfiltration requests, and prompt-injection signals.
Security & PrivacyFind your target indoor humidity range, dew point, mould and condensation risk, and the water to add or remove.
Health & FitnessInflation Adjusted Return Calculator
Convert nominal returns into real, inflation-adjusted returns over any period and see what your money is truly worth.
Finance & BusinessInflation Purchasing Power Calculator
See what inflation does to your money — future costs, shrinking purchasing power, and the return you need to beat it.
Finance & BusinessConvert a rupee amount between any two years using India's official CPI inflation series, with the purchasing power lost in between.
Education & ScienceInfluencer Disclosure Label Generator
Build a compliant paid-partnership disclosure for each platform and content type, with placement rules and on-screen duration.
Marketing & SocialInfluencer Engagement Rate Calculator
Work out engagement rate by followers, by reach and by impressions from real post totals, with creator tier and quality bands.
CalculatorsBuild a professional media-kit PDF from your creator metrics and audience data.
Marketing & SocialFind instant ingredient replacements with precise ratios and dietary filters.
LifestyleStep-by-step technique checks for pMDI, spacer, dry powder, soft mist and breath-actuated inhalers.
Health & FitnessConvert INI configuration files to structured YAML with dotted sections nested and value types inferred.
ConvertersCatch butterflies, bees, ladybugs and more in this fast, fun insect-tracking arcade game. Beat your high score across rising difficulty levels.
GamesPlan carousel slide order, hooks and swipe pacing, with projected swipe-through retention and read time per slide.
Marketing & SocialEnhance your Instagram display picture with vibrant gradient borders, filters, and effects — download-ready in 1080x1080.
Design & ColorWork out how much term life, health and personal accident cover you need from income, family, loans and city.
Finance & BusinessCompare insurance policies on coverage, exclusions, waiting periods and limits.
Finance & BusinessInsurance Policy Renewal Tracker
Track every policy number, sum insured and renewal date in one place, with annualised premium, grace period and lapse dates.
Finance & BusinessInteractive Seating Chart Maker
Design seating arrangements for weddings, classrooms, and banquets with table layouts and attendee dragging.
LifestyleInterior Design Prompt Generator
Turn a room, style and budget feel into an AI image prompt, with lighting lumens and rug size computed from your room dimensions.
LifestyleTrack your fasting window live, see the metabolic phase you are in, and log every fast with streaks.
Health & FitnessCompute your internal assessment marks from tests, assignments and attendance using your university's component weightings.
CalculatorsInternational Call Cost Calculator
Compare roaming per-minute, local SIM, VoIP-over-data and calling-pack pricing for calls home during a trip.
ProductivityInternational Driving Permit Checker
Check whether you need an International Driving Permit to drive in the USA, UK, UAE, Australia, Canada, New Zealand, Japan, Germany, France or Italy with an Indian licence.
LifestyleGet fast and accurate speed test results for your network.
DeveloperPractice melodic and harmonic intervals with an interactive browser-based ear training quiz.
Image & VideoInterview Consent Form Builder
Generate a plain-language interview recording consent form covering purpose, usage, retention and the right to withdraw.
Finance & BusinessFind interview questions for your interview preparation
Education & ScienceInterview Weightage Calculator
Combine written and interview marks under the official weightage of UPSC, IBPS or SBI and see exactly how much the interview can move your merit.
CalculatorsWork out how many decibels to duck an intro music bed under a voiceover, and what the mixed level lands at.
CalculatorsInverter & Battery Backup Calculator
Size your home inverter VA and battery Ah from your real appliance load, with backup and charging time.
CalculatorsInverter AC Payback Calculator
Work out how many years an inverter AC takes to repay its price premium over a fixed-speed unit, using ISEER and your tariff.
Finance & BusinessInverter Backup Time Calculator
Estimate home inverter backup hours from battery Ah, bank voltage, connected load and inverter efficiency, with Peukert correction.
CalculatorsCompare lumpsum vs SIP, direct vs regular mutual fund plans, cumulative vs non-cumulative FD, digital vs physical gold, UPS vs NPS, simple vs compound interest, flat vs reducing rates and 80TTA vs 80TTB.
Finance & BusinessInvestment Fee Impact Calculator
See how expense ratios, management fees, and transaction costs eat into your investment returns over time.
Finance & BusinessA practical crypto / invest tool for managing investor risk profile quiz workflows efficiently.
Finance & BusinessGenerate invisible Unicode characters like zero-width spaces and joiners. Copy with one click for use in bios, usernames, and more.
Text & WritingInvoice Fraud Change Inspector
Compare observable invoice fields and payment details locally, confirm extracted values manually, and review changes without treating them as proof of fraud.
Security & PrivacyCreate clean invoices with line items, tax, discount, totals, and print-ready output.
Finance & BusinessGenerate sequential or date-based invoice numbering schemes in bulk, with prefixes, padding and period resets.
GeneratorsInvoice-to-Time-Log Reconciler
Surface mismatches between your billable hours and the invoice line items.
Finance & BusinessDraft an acknowledgement of debt with the amount in words, simple interest to the due date and the limitation expiry.
Finance & BusinessCheck if an IP address is valid or not
DeveloperConvert IP address to number. The online tool to convert IP address to number can quickly convert IP address to digital format.
DeveloperLook up an IP address's approximate location, ISP, ASN, timezone and map links.
DeveloperCheck whether CIDR blocks or IP ranges overlap before VPC peering, VPN setup or merging networks.
DeveloperPaste IPA notation and get the most likely English word(s), with multiple candidate suggestions and validation for malformed input.
Education & ScienceExpand a shortened IPv6 address to its full form.
DeveloperChallenge your brain with an IQ-style mini quiz featuring logical reasoning, pattern recognition, memory, and problem-solving questions across multiple difficulty levels.
Education & ScienceIron Intake Calculator For Women
Daily iron target from age, life stage, diet type and menstrual blood loss, using the IOM dietary reference intakes.
Health & FitnessIs That Planet Retrograde Right Now
Live retrograde status for all eight planets, with station-retrograde and station-direct dates plus both shadow windows, computed from the ephemeris.
Education & ScienceA professional accessibility-focused color vision deficiency screening experience.
Health & FitnessCheck whether a website is down globally or only on your own network.
DeveloperConvert a date/time to ISO-8601 and other formats.
DeveloperCalculate the next visible International Space Station flyover for your location.
DeveloperBuild a day-wise travel itinerary with time slots, activities, costs, conflicts, pace, and export-ready plans.
LifestyleITR Document Checklist Builder
Build a personalised list of the documents you need to file your income tax return, based on your income sources and deductions.
Finance & BusinessITR Form Applicability Checker
Answer a few questions about your income to see whether ITR-2 or ITR-3 applies to you and why.
Finance & BusinessITR-U Eligibility Gate & Cost Calculator
Check the section 139(8A) bars that block an updated return, then price it: the deadline, the section 140B additional tax slab and the total rupee cost.
Finance & BusinessDue date from an IVF embryo transfer or egg retrieval date, with the day-3, day-5 and day-6 transfer offsets and a milestone timeline.
Health & Fitness