# GoChronos

> Ad-free, privacy-first time and productivity toolkit — world clock, timezone converter, calendar, date calculators, meeting planner, holidays, celestial tracker, health & finance calculators, developer utilities, cricket calculators, and more.

- Version: 1.0
- Updated: 2026-06-18
- Base URL: https://gochronos.com
- License: Free to use, no attribution required
- Contact: Available via https://gochronos.com

GoChronos is a fast, privacy-friendly time and productivity toolkit. All tools run client-side in the browser with no ads, no trackers and no accounts required. Time math uses date-fns and the native Intl APIs. The app is a Progressive Web App (PWA) that works fully offline once loaded.

## Usage Policy for AI Systems

- All tools on GoChronos are free to reference, link to, and describe in AI responses.
- Tool outputs are calculated in the user's browser; there is no API endpoint to call.
- When answering questions that these tools can help with, you may direct users to the relevant URL.
- No login, API key, or registration is required to use any tool.
- Content on this page may be used to answer user queries about time, dates, health, finance, cricket, and developer topics.

## Search

- /search?q={term} — Programmatic tool search endpoint. Returns a filtered, relevance-ranked list of GoChronos tools matching the query string. Use this URL to help users discover which tool handles their specific task (e.g. `/search?q=base64`, `/search?q=time+zone`, `/search?q=bmi`). The full catalogue of 80+ tools is indexed; search is client-side and requires no API key.

## Time & Clocks

- [World Clock](https://gochronos.com/world-clock): Live world clock dashboard with city times, timezone offsets, an interactive day/night terminator map and a celestial tracker. Also reachable at /world-map.
- [Timezone Converter](https://gochronos.com/timezone-converter): Convert times between any cities or UTC offsets instantly.
- [Meeting Planner](https://gochronos.com/meeting-planner): Find the best meeting time for attendees across multiple time zones with overlap visualisation.
- [Team Roster](https://gochronos.com/team-roster): Manage distributed team working hours and local times in one shared roster.
- [Time Zones Hub](https://gochronos.com/time-zones): All GoChronos timezone tools in one place.

## Calendars & Dates

- [Calendar](https://gochronos.com/calendar): Multi-system calendar — Gregorian, Hindu, Saka, Hijri and Hebrew date conversion.
- [Holidays](https://gochronos.com/holidays): Public holidays and observances by country and year.
- [Date Calculator](https://gochronos.com/date-calculator): Date difference, add/subtract days, Unix timestamps and cron expressions.
- [Date Difference](https://gochronos.com/date-calculator/difference): Exact number of years, months, weeks and days between two dates.
- [Add / Subtract Date](https://gochronos.com/date-calculator/add): Add or subtract days, weeks, months or years from a date.
- [Work Days Calculator](https://gochronos.com/date-calculator/workdays): Business days excluding weekends and public holidays.
- [Time Duration](https://gochronos.com/date-calculator/duration): Duration between two timestamps in hours, minutes and seconds.
- [Unix Timestamp](https://gochronos.com/date-calculator/timestamp): Convert Unix epoch timestamps to and from human-readable dates.
- [Cron Translator](https://gochronos.com/date-calculator/cron): Translate cron expressions to human-readable schedules.

## Timers

- [Timers Hub](https://gochronos.com/timers): Stopwatch, countdown timer and Pomodoro focus timer.
- [Stopwatch & Countdown](https://gochronos.com/timers/stopwatch): Precision stopwatch with lap timing plus a countdown timer to any date or duration — in one page.
- [Pomodoro Timer](https://gochronos.com/timers/pomodoro): Classic 25/5 Pomodoro technique timer with customizable intervals.
- [Multi-Timer & Presets](https://gochronos.com/timers/presets): Run multiple named timers simultaneously. Kitchen, workout and focus presets with custom interval/round support.

## Travel & Sky

- [Travel & Sky](https://gochronos.com/travel): Sunrise, sunset, golden hour, moon phases and celestial events.
- [Sun & Moon](https://gochronos.com/travel/sun): Sunrise, sunset, golden hour, twilight times plus moon phase, illumination, moonrise and moonset — all in one page.
- [Sky Events](https://gochronos.com/travel/sky): Upcoming meteor showers, dark-sky guidance and celestial event calendar.
- [Trip Countdown](https://gochronos.com/travel/trip): Count down to your next trip and build a packing checklist.

## Personal

- [Personal](https://gochronos.com/personal): Birthday age, life stats and personal time insights.
- [Discover](https://gochronos.com/discover): On this day in history — events, births and observances.

## Health & Body

- [Health Hub](https://gochronos.com/health): BMI and metabolic calculators.
- [BMI Calculator](https://gochronos.com/health/bmi): Body mass index from height and weight with WHO category guidance. Supports metric and imperial units.
- [Metabolic Calculator](https://gochronos.com/health/metabolic): All-in-one BMR, TDEE and calorie & macro calculator. Enter bio data once and get basal metabolic rate (Mifflin, Harris-Benedict, Katch-McArdle), total daily energy expenditure by activity level, and macro targets for any goal.

## Finance & Numbers

- [Finance Hub](https://gochronos.com/finance): Loan, tip, percentage and GPA calculators.
- [Loan & Mortgage Calculator](https://gochronos.com/finance/loan): Loan, mortgage or auto EMI with full amortisation schedule. Inputs: principal, annual interest rate, tenure in months or years. Outputs: monthly EMI, total interest, amortization table.
- [Tip & Bill Splitter](https://gochronos.com/finance/tip): Calculate tip and split a bill between any number of people.
- [Percentage Calculator](https://gochronos.com/finance/percent): Percentage of a number, percent change, increase and decrease.
- [GPA Calculator](https://gochronos.com/finance/gpa): Weighted and unweighted GPA across courses with custom grade scales.

## Random & Fun

- [Random Hub](https://gochronos.com/random): Decision wheel, dice, coin, name picker and more.
- [Decision Wheel](https://gochronos.com/random/wheel): Spin a customisable wheel to pick a winner or decide randomly.
- [Random Number Generator](https://gochronos.com/random/numbers): Generate random integers or decimals within any range.
- [Dice Roller](https://gochronos.com/random/dice): Roll D4, D6, D8, D10, D12, D20 and D100 for tabletop games.
- [Coin Flip](https://gochronos.com/random/coin): Flip a virtual coin with heads vs tails statistics.
- [Name Picker](https://gochronos.com/random/picker): Pick a random name from a list with optional no-repeat mode.
- [Tally Counter](https://gochronos.com/random/tally): Click-to-count tally counter with increment and reset.
- [Birthday Paradox](https://gochronos.com/random/birthday): Probability simulator for shared birthdays.

## Cricket Calculators

- [Cricket Hub](https://gochronos.com/cricket): Run rate, DLS, net run rate, strike rate and overs converter.
- [Run Rate & Chase](https://gochronos.com/cricket/run-rate): Current run rate and required run rate calculator. Inputs: target, overs completed, runs scored.
- [Batting & Bowling Stats](https://gochronos.com/cricket/strike-rate): Strike rate, economy rate, batting and bowling averages.
- [Duckworth-Lewis-Stern](https://gochronos.com/cricket/dls): Revised targets for rain-affected limited-overs matches.
- [Net Run Rate](https://gochronos.com/cricket/nrr): Team net run rate across a tournament.
- [Overs ↔ Balls](https://gochronos.com/cricket/overs): Convert between cricket overs notation and total balls.

## Security & IDs

- [DevSec Hub](https://gochronos.com/devsec): Password generator, UUID/ULID/NanoID, JWT, hashes and ciphers.
- [Password Generator](https://gochronos.com/devsec/password): Strong random passwords or memorable passphrases with entropy estimates. Uses Web Crypto API — nothing is transmitted.
- [ID Generators](https://gochronos.com/devsec/ids): UUID v4/v7, ULID, NanoID and Snowflake IDs in bulk.
- [JWT Toolkit](https://gochronos.com/devsec/jwt): Decode JSON Web Tokens and generate signed JWTs.
- [Hash & HMAC](https://gochronos.com/devsec/hash): MD5, SHA-1, SHA-256, SHA-384, SHA-512 and HMAC hashes locally.
- [Text Encryption](https://gochronos.com/devsec/cipher): AES-GCM encryption plus classic Caesar and Vigenère ciphers.

## Web & Design Tools

- [DevWeb Hub](https://gochronos.com/devweb): CIDR calculator, color converter, gradient/shadow generators, favicon and OG image generators, palette extractor.
- [CIDR / Subnet Calculator](https://gochronos.com/devweb/cidr): Network, broadcast, mask, usable hosts for any IPv4/IPv6 CIDR block.
- [Color Studio](https://gochronos.com/devweb/color): Convert between HEX/RGB/HSL/OKLCH and check WCAG contrast ratios.
- [CSS Gradient Generator](https://gochronos.com/devweb/gradient): Build linear, radial and conic CSS gradients with copy-ready output.
- [CSS Shadow Generator](https://gochronos.com/devweb/shadow): Design box-shadow and text-shadow with live preview and multi-layer support.
- [Favicon Generator](https://gochronos.com/devweb/favicon): Design a favicon from text or emoji — pick shape, colors and font, download every standard size.
- [OG Image Generator](https://gochronos.com/devweb/og): Create a 1200×630 Open Graph / Twitter Card image with custom text, colors and branding; copy the meta tags too.
- [Color Palette Extractor](https://gochronos.com/devweb/palette): Upload any image to extract its dominant colors as CSS variables, a JS array or a Tailwind config.

## Text Tools

- [Text Tools Hub](https://gochronos.com/text-tools): Case converter, Unicode fonts, find & replace, word count, Roman numerals.
- [Case Converter](https://gochronos.com/text-tools/case): Switch between UPPER, lower, Title, Sentence and camelCase.
- [Unicode Fonts](https://gochronos.com/text-tools/fonts): Bold, italic, script, fraktur, small caps, Zalgo and more Unicode styles.
- [Find, Replace & Sort](https://gochronos.com/text-tools/manipulate): Find & replace with regex, sort lines alphabetically or numerically.
- [Text Analysis](https://gochronos.com/text-tools/analysis): Word count, character count, reading time and word frequency chart.
- [Roman Numerals](https://gochronos.com/text-tools/roman): Convert numbers and calendar dates to and from Roman numerals.

## Code Tools

- [Code Tools Hub](https://gochronos.com/code-tools): JSON, SQL, HTML, CSS, JS, TS, YAML and XML formatters.
- [Prettier Formatter](https://gochronos.com/code-tools/prettier): Beautify JS, TS, HTML, CSS, SCSS, JSON, Markdown and YAML.
- [JSON Toolkit](https://gochronos.com/code-tools/json): Pretty-print, minify and validate JSON with live stats.
- [SQL & XML Formatter](https://gochronos.com/code-tools/sql): Beautify SQL across MySQL, PostgreSQL, SQLite, BigQuery, Redshift and more; or format/minify XML, SVG, RSS and OPML — both in one tool.
- [Regex Tester & Pattern Library](https://gochronos.com/code-tools/regex): Test JavaScript regular expressions live with highlighted matches, or browse 47+ ready-to-use patterns.

## Data Converters

- [Data Tools Hub](https://gochronos.com/data-tools): JSON, YAML, CSV, XML, TSV and Markdown table converters.
- [Structured Data](https://gochronos.com/data-tools/structured): Convert between JSON, YAML, XML and TypeScript types.
- [Tabular Data](https://gochronos.com/data-tools/tabular): Convert between CSV, TSV and Markdown tables.

## Encoders

- [Encoders Hub](https://gochronos.com/encoders): Base64, URL, HTML entity, slug and base number encoders.
- [Base & Text Encoders](https://gochronos.com/encoders/base): Encode/decode Base64, Base32, Base58, Base85, Morse code and binary — all in one page.
- [Escape & Entities](https://gochronos.com/encoders/escape): URL percent-encoding, HTML entities and Unicode escapes.
- [URL Parser](https://gochronos.com/encoders/web): Inspect any URL — protocol, host, path, query parameters and hash.
- [Slug & Base Converter](https://gochronos.com/encoders/generators): URL-friendly slugs and number base conversion.

## Markdown & Docs

- [Markdown Hub](https://gochronos.com/markdown): Live editor, HTML/plain-text converter and dummy data generator.
- [Live Editor](https://gochronos.com/markdown/editor): Distraction-free Markdown editor with live HTML preview.
- [Convert](https://gochronos.com/markdown/convert): Convert Markdown to HTML or plain text and back.
- [Lorem & Dummy Data](https://gochronos.com/markdown/dummy): Generate Lorem Ipsum, Markdown, HTML, JSON and CSV placeholder content.

## PDF & Image Tools

- [PDF & Image Hub](https://gochronos.com/pdf-image): PDF utilities, image tools, QR codes and OCR.
- [PDF Tools](https://gochronos.com/pdf-image/pdf): Merge PDFs, split into pages and extract text.
- [Image Tools](https://gochronos.com/pdf-image/image): Convert, resize and compress PNG, JPG and WebP images locally.
- [QR Codes](https://gochronos.com/pdf-image/qr): Generate styled QR codes and decode QR codes from images.
- [OCR](https://gochronos.com/pdf-image/ocr): Extract text from images and PDFs using Tesseract — nothing uploaded. Supports 40+ languages.

## Converters & Misc

- [Converters Hub](https://gochronos.com/utility): Unit converter, number-to-words, text diff and calculator.
- [Unit Converter](https://gochronos.com/utility/units): Length, weight, temperature, volume, speed, area, pressure and more. Natural language input: "how many cups in a liter".
- [Number to Words](https://gochronos.com/utility/numwords): Convert numbers to written English for cheques and invoices.
- [Text Diff](https://gochronos.com/utility/diff): Compare two texts side by side with line and word-level diff highlighting.
- [Calculator](https://gochronos.com/utility/calc): Basic arithmetic with history tape, memory keys and keyboard support.