FREE · FAST · SECURE
Random Number Generator – True Secure Random & Coin Flip
—
42
⬇️ click number to copy
📘 FAQ – Random & Coin Flip
How random? Uses crypto.getRandomValues().
🔐 Cryptographically secure random numbers & coin flips — no patterns, no tracking.
FREE · FAST · SECURE
Online Stopwatch – Millisecond Precision
00:00:00
millisecond precision · instant response
📘 FAQ – Stopwatch
Accurate? Uses performance.now().
⚡ Zero lag, pure accuracy — a simple, reliable stopwatch for any device.
FREE · FAST · SECURE
Age & Lifespan Calculator – Exact Years, Months, Days & Obituary Age
📘 FAQ – Age & Lifespan
How to calculate age at death? Switch to "Lifespan" mode, enter birth and death dates.
📅 Exact age or lifespan in years, months, days — ideal for obituaries, genealogy, and personal records.
FREE · FAST · SECURE
Unit Converter – Length, Weight, Temperature
📘 FAQ – Unit Converter
Exact? Uses standard factors.
🔄 Real‑time metric/imperial conversion — instant, accurate, and private.
FREE · FAST · SECURE
Base Converter – Binary, Octal, Hexadecimal
Binary11111111
Octal377
HexFF
✨ edit decimal, real‑time convert
📘 FAQ – Base Converter
Negative? Only non-negative.
💻 Perfect for developers — instant binary/octal/hex conversion, all local.
FREE · FAST · SECURE
Percentage Calculator – % of a Number, Change, Discount
40
📘 FAQ – Percentage
Tip? Use Tip Calculator.
💰 Fast & accurate — calculate discounts, tips, or any percentage instantly.
FREE · FAST · SECURE
Cups to Grams – Baking Ingredient Converter
Cups
Standard (spoon & level)
equals
125grams
≈ 1 stick of butter
📋 Data sources
USDA, King Arthur, BBC Good Food.
🇺🇸 1 cup = 125g (AP flour)
📘 FAQ – Cups to Grams
1 cup flour? 125g.
🧁 Instant cups to grams conversion for 30+ baking ingredients. Free, private, mobile‑first.
FREE · FAST · SECURE
Tip Calculator – Split Bill, Tax Included
15%
Each person pays
128.80USD
Subtotal: $100.00 + Tax: $8.00 + Tip: $20.80
📘 FAQ – Tip Calculator
Standard tip? 15-20%.
💸 Free tip calculator with tax and split bill. Estimates only.
FREE · FAST · SECURE
Pet Age Calculator – Dog & Cat Years
Equivalent Human Age
28years
Based on AVMA guidelines
📘 FAQ – Pet Age
Accurate? AVMA guidelines.
🐾 Convert pet years to human years. Estimates only, consult your vet.
FREE · FAST · SECURE
Strong Password Generator – Random & Secure
Click Generate
⬇️ click copy to save
📘 FAQ – Password
Secure? Crypto.getRandomValues.
🔐 Generate cryptographically secure passwords instantly. No tracking.
FREE · FAST · SECURE
Free QR Code Generator – No Watermark
✨ no watermark · instant
📘 FAQ – QR Code
Free? Yes, no watermark.
📷 Create high-quality QR codes instantly. No upload, no tracking.
FREE · FAST · PRIVATE
Blurple Emoji Maker – Discord Color
⬆️ Upload an image
100% private · image never leaves your device
📘 FAQ – Blurple
What is Blurple? Discord's purple-blue.
🎨 Turn any emoji into Discord's blurple color. Free, private.
FREE · FAST · HELPFUL
Formula Error Decoder – #REF!, #N/A, #VALUE!
Enter a formula or error code above.
📘 FAQ – Formula Errors
#REF! fix? Check deleted cells.
📋 Instantly decode spreadsheet errors. Works for Excel & Google Sheets.
FREE · FAST · ACCURATE
Ring Size Converter – US, UK, EU, JP
Equivalent sizes
📘 FAQ – Ring Sizes
How to measure? Wrap string, measure length.
💍 Instant international ring size conversion. Free, private.
FREE · FAST · ACCURATE
Japanese Era Converter – Reiwa, Heisei, Showa
⇄
↕️ bidirectional real‑time
📘 FAQ – Japanese Era
Reiwa 8? 2026. Reiwa started 2019.
🇯🇵 Convert Gregorian years to Japanese eras. Instant, free.