Free tools, zero clutter.

Find a percentage of a number, what % one number is of another, and more.

Calculate your exact age in years, months, and days.

Calculate the difference between two dates with a live countdown to future dates.

Convert times across time zones instantly. Multi-zone view with DST-aware offsets and a visual timeline.

Find sunrise, sunset, solar noon, and twilight times for any location and date.

Convert between cooking, length, weight, temperature, and volume units.

Plot your child's height, weight, and head circumference on WHO and CDC growth charts with percentile and adult height prediction.

Generate secure random numbers, flip coins, and roll dice.

Generate strong random passwords and passphrases with entropy-based strength estimates.

Generate random usernames and display names from adjective-noun combinations.

Calculate sales tax and total price. Add tax to a price or extract it from a total.

Calculate tip amount, total bill, and per-person split instantly.

Calculate monthly payments, total interest, and view a full amortization schedule.

See how your savings grow with compound interest and optional monthly contributions.

Track income and expenses by category, set monthly budgets, manage savings goals, and view spending trends.

Log hours by project and task, view weekly and monthly summaries, and export for billing.

Scale recipe ingredient quantities up or down. Handles fractions, mixed numbers, and ranges.

Plan your meals for the week, build a reusable recipe library, and generate a grocery shopping list.

Calculate your Body Mass Index from height and weight. Metric and imperial.

Estimate calories burned during exercise by activity, duration, and body weight.

Stopwatch with lap tracking and countdown timer with audible alarm.

A private, offline-first task manager. Create tasks with due dates and priorities, organise into lists, and track subtasks.

Generate placeholder text by paragraphs, sentences, or words. Classic Latin, English-like, or Hipster Ipsum.

Count words, characters, sentences, paragraphs, and estimated reading time.

Parse cron expressions into plain English, preview the next scheduled run times, and browse common patterns.

Calculate IPv4 subnet details from CIDR notation — network address, broadcast, host range, mask, and subnet splitting.

Decode and inspect JSON Web Tokens. View header, payload, claims, and expiry status.

Convert between CSV and JSON formats. Handles RFC 4180 quoting, custom delimiters, type inference, and table preview.

Test and debug regular expressions with live match highlighting, capture group extraction, and flag toggles.

Generate SHA-256, SHA-384, and SHA-512 cryptographic hashes from text.

Convert numbers between binary, octal, decimal, and hexadecimal.

Convert between Unix timestamps and human-readable dates. Live clock included.

Generate v4 (random), v5 (deterministic), and v7 (time-ordered) UUIDs.

Format and prettify JSON, or minify it for production. Validates JSON instantly.

Encode text to Base64 or decode Base64 back to plain text.

Encode text for URLs or decode percent-encoded strings back to plain text.

Generate QR codes for URLs, text, Wi-Fi, contacts, email, and SMS. Customize colors and download as SVG or PNG.

Encode special characters to HTML entities and decode entities back to plain text. Supports named, decimal, and hexadecimal formats.

Generate harmonious color palettes from any base color. Complementary, analogous, triadic, tetradic, and more.

Convert colors between hex, RGB, HSL, and HSV. Visual picker, eyedropper, and WCAG contrast checker.

Find upcoming solar and lunar eclipses with local visibility. See if an eclipse is visible from your location.

Find Hohmann transfer windows between any two solar system bodies, with countdown, timetables, and ΔV estimates.

Discover your natal chart: sun sign, moon sign, rising sign, and planet placements.

Find out how old your dog is in human years, accounting for size and breed.

Classic mine-sweeping game with Beginner, Intermediate, and Expert difficulties.

Create drag-and-drop tier list rankings. Add items as text or images, customize tiers, and export as PNG or shareable file.