# Tejji

> Free online tools — calculators, converters, IP tools, time/date utilities, and more. No sign-up required. All tools run client-side for privacy.

## About

Tejji provides 115+ free online tools across 8 categories. All tools work in the browser with no server round-trips for calculations. No account needed.

## Categories

### Finance Tools
- [Mortgage Calculator](/apps/mortgage-calculator): Calculate monthly mortgage payments with amortization
- [Loan EMI Calculator](/apps/loan-emi-calculator): Calculate monthly EMI with amortization schedule
- [Compound Interest Calculator](/apps/compound-interest-calculator): Calculate compound interest with monthly contributions
- [Investment Calculator](/apps/investment-calculator): Calculate SIP and lump sum investment returns
- [Retirement Calculator](/apps/retirement-calculator): Plan retirement with corpus projection and 4% rule
- [Future Value Calculator](/apps/future-value-calculator): Calculate future value of money
- [NPV Calculator](/apps/net-present-value-calculator): Calculate net present value of cash flows
- [Inflation Calculator](/apps/inflation-calculator): See how inflation erodes purchasing power
- [Salary Calculator](/apps/salary-calculator): Convert salary between hourly, weekly, monthly, annual
- [Tax Calculator](/apps/tax-calculator): Calculate US federal income tax with bracket breakdown
- [Sales Tax Calculator](/apps/sales-tax-calculator): Calculate sales tax for any US state
- [Tip Calculator](/apps/tip-calculator): Calculate tips, split bills, per-person totals
- [Percentage Calculator](/apps/percentage-calculator): Calculate percentages, % of, % change
- [APR to APY](/apps/apr-to-apy): Convert annual percentage rate to annual percentage yield
- [Money Converter](/apps/money-converter): Convert between currencies worldwide
- [Send Money](/apps/send-money): Compare exchange rates for international transfers
- [Invoice Generator](/apps/invoice-generator): Create professional invoices

### Math & Science Tools
- [Calculator](/apps/calculator): Basic and scientific calculator with history
- [Pythagorean Theorem](/apps/pythagoras-theorem): Find any side of a right triangle
- [Roman Numeral Converter](/apps/roman-numeral-converter): Convert between Arabic and Roman numerals

### Health Tools
- [BMI Calculator](/apps/bmi-calculator): Calculate Body Mass Index (imperial/metric)
- [Body Fat Calculator](/apps/body-fat-calculator): Estimate body fat using US Navy method
- [Calorie Calculator](/apps/calorie-calculator): Calculate daily calorie needs with BMR and TDEE

### Education Tools
- [GPA Calculator](/apps/gpa-calculator): Calculate GPA with courses and credit hours
- [Grade Calculator](/apps/grade-calculator): Calculate course grade with weighted assignments

### Developer Tools
- [JSON Formatter](/apps/json-formatter): Format, validate, and beautify JSON
- [Regex Tester](/apps/regex-tester): Test regular expressions in real-time
- [Hash Generator](/apps/hash-generator): Generate MD5, SHA-1, SHA-256, SHA-512 hashes
- [UUID Generator](/apps/uuid-generator): Generate random UUID v4 strings
- [Timestamp Converter](/apps/timestamp-converter): Convert Unix timestamps to dates
- [Cron Expression Builder](/apps/cron-expression-builder): Build cron schedule expressions
- [Base64 Encoder/Decoder](/apps/encode-decode-base64): Encode and decode Base64
- [HTML Encoder/Decoder](/apps/encode-decode-html): Encode and decode HTML entities
- [HTML to Text](/apps/html-to-text): Strip HTML tags, convert to plain text
- [URL Encoder/Decoder](/apps/url-encoder-decoder): Encode and decode URLs
- [Markdown Editor](/apps/markdown-editor): Edit Markdown with live preview
- [Meta Tag Generator](/apps/meta-tag-generator): Generate SEO meta tags
- [QR Code Generator](/apps/qr-code-generator): Generate QR codes for URLs and text
- [Password Generator](/apps/password-generator): Generate strong random passwords
- [Color Picker](/apps/color-picker): Pick colors, convert HEX/RGB/HSL

### Text & Utility Tools
- [Character Count](/apps/character-count): Count characters, words, sentences
- [Typo Generator](/apps/typo-generator): Generate typo combinations for domain research
- [Traffic Rank](/apps/traffic-rank): Check website traffic ranking

### Date Tools
- [Age Calculator](/apps/age-calculator): Calculate exact age with zodiac and milestones
- [Date Calculator](/apps/date-calculator): Calculate days between dates
- [What Day Is It](/apps/what-day-is-it): Find day of the week for any date
- [Lottery Number Generator](/apps/lottery-number-generator): Generate random lottery numbers
- [Pomodoro Timer](/apps/pomodoro-timer): Focus timer with work/break intervals

### Unit Converters
- [Temperature](/convert/temperature-conversion): Celsius, Fahrenheit, Kelvin
- [Length](/convert/length-conversion): Meters, feet, inches, miles
- [Mass/Weight](/convert/mass-conversion): Kilograms, pounds, ounces
- [Speed](/convert/speed-conversion): MPH, KPH, knots
- [Bytes/Data](/convert/bytes-conversion): Bytes, KB, MB, GB, TB
- [Number Systems](/convert/number-conversion): Decimal, binary, octal, hex
- [Angle](/convert/angle-conversion): Degrees, radians, gradians
- [Astronomical](/convert/astronomical-conversion): Light years, parsecs, AU
- [Frequency](/convert/frequency-conversion): Hertz, kilohertz, megahertz
- [Mileage/Fuel](/convert/mileage-conversion): MPG, km/L, L/100km
- [Metric](/convert/metric-conversion): Common metric and imperial units
- [Length Metric](/convert/length-metric-conversion): Metric length unit prefixes
- [Mass Metric](/convert/mass-metric-conversion): Metric mass unit prefixes
- Quick converters: [°C→°F](/convert/celsius-to-fahrenheit), [°F→°C](/convert/fahrenheit-to-celsius), [cm→in](/convert/cm-to-inches), [in→cm](/convert/inches-to-cm), [ft→m](/convert/feet-to-meters), [m→ft](/convert/meters-to-feet), [mm→in](/convert/mm-to-inches), [yd→m](/convert/yards-to-meters), [kg→lbs](/convert/kg-to-lbs), [lbs→kg](/convert/lbs-to-kg), [kg→oz](/convert/kg-to-oz), [oz→g](/convert/oz-to-g), [g→oz](/convert/g-to-oz), [kg→stone](/convert/kg-to-stone), [stone→kg](/convert/stone-to-kg), [km→mi](/convert/km-to-miles), [mi→km](/convert/miles-to-km), [kph→mph](/convert/kph-to-mph), [mph→kph](/convert/mph-to-kph), [KB→MB](/convert/kb-to-mb), [MB→GB](/convert/mb-to-gb), [GB→MB](/convert/gb-to-mb), [GB→TB](/convert/gb-to-tb)

### IP Tools
- [My IP Address](/ip/my-ip-address): See your public IP address
- [IP to Location](/ip/ip-to-location): Geolocate any IP address
- [Bulk IP Lookup](/ip/bulk-ip-lookup): Look up multiple IPs at once
- [IP to URL](/ip/ip-address-to-url): Reverse DNS lookup
- [URL to IP](/ip/url-to-ip-address): DNS resolution
- [IP to Number](/ip/ip-to-number): Convert IPv4 to decimal
- [IPv4 to IPv6](/ip/ipv4-to-ipv6-conversion): Address format conversion
- [Server Variables](/ip/ip-server-variables): View request headers
- [DNS Lookup](/ip/dns-lookup): Query DNS records
- [WHOIS Lookup](/ip/whois-lookup): Domain registration info
- [IP Blacklist Check](/ip/ip-blacklist-check): Check IP reputation
- [Subnet Calculator](/ip/subnet-calculator): Calculate subnets and CIDR

### Time & Date
- [World Clock](/time-date/world-clock): Time in cities worldwide
- [Current Time](/time-date/current-time): Current time in any city
- [Time Zone Conversion](/time-date/time-conversion): Convert between time zones

### Visa / Immigration
- [H1B Visa Data](/visa/h1b): H1B LCA data for companies
- [H1B Sponsors](/visa/h1b-sponsors): Search H1B sponsor companies
- [H1B Salary](/visa/h1b-salary): H1B salary data by job title
- [H1B Trends](/visa/h1b-trends): H1B filing trends over time
- [H1B Compare](/visa/h1b-compare): Compare H1B sponsors side by side

### Postal Codes
- [ZIP Codes](/zip-codes): Postal codes worldwide
- [India Pincode Finder](/zip-codes/pincode-finder): India postal code lookup
- [US ZIP Code Details](/zip-codes/us/{zip}): Detailed US ZIP code pages
- [India PIN Code Details](/zip-codes/india/{pin}): Detailed India PIN code pages

### SEO
- [Keyword Tool](/seo/keyword-tool): Search suggestions from search engines

## API

- Cities endpoint: `GET /api/location/cities?q={query}` — search ~80K cities worldwide

## Optional

- Full detail version: [/llms-full.txt](/llms-full.txt)
- Sitemap: [/sitemap.xml](/sitemap.xml)