18 tools
Tools
Choose a tool and use it without installing an app. Calculations and conversions run in your browser; shared schedules are saved on a server.
Privacy18 tools
Age Across Cultures
Birthday-based age, generation range, birthstone, star sign and days alive.
Word Count
Words · characters · draft targets; verify platform rules.
JSON Formatter
Beautify, minify, sort keys, and validate sample JSON. No live secrets.
US Salary Tax Estimator
2026 annual federal tax, FICA & assumed state tax — monthly average, not a pay stub.
Interest & Mortgage
Monthly savings and mortgage models, with explicit assumptions.
Percentage Calculator
Percent of, ratio, change, discount, add/remove tax, margin, and increase/decrease — 8 modes.
Age Across Cultures
Birthday-based age, generation range, birthstone, star sign and days alive.
Lunar Calendar
60 ganzhi · 24 solar terms · leap month.
Group Schedule
Share a name or nickname and available times to plan a meeting. Shared entries are stored on the server.
Pomodoro at Sea Timer
Focus 25 minutes as a voyage with PiPi, earning a digital treasure each time — a web preview of the Pomodoro at Sea app.
BMI / BMR / TDEE
BMI, BMR and estimated daily calories. Reference values, not a diagnosis.
Pregnancy
Estimate weeks and a due date from LMP, ovulation or IVF transfer.
Word Count
Words · characters · draft targets; verify platform rules.
Japanese & Korean Vocabulary
Flip 12 sample words, then answer 5 quiz questions. A free Vocab Routine web example; progress stays here.
Line Tools
Remove blank lines, trim, dedupe, and sort.
QR Generator
Create QR codes for URLs, text and contacts; download PNG or SVG.
JSON Formatter
Beautify, minify, sort keys, and validate sample JSON. No live secrets.
URL Encode / Decode
Percent-encode query values, Unicode, and emoji. Component or full.
Base64
UTF-8 and URL-safe encode/decode for samples and non-sensitive values.
JWT Decoder
Inspect sample JWT claims and expiry. No signature verification.
Markdown → HTML
Sanitized live preview · raw HTML source to copy.