Quick Preview
CoreBox provides built-in instant preview capabilities that automatically recognize and display preview cards as you type in the search box.
Feature List
Tuff includes 9 preview abilities covering calculations, conversions, time, colors, and more.
Advanced Expression Calculator
Examples: sqrt(16), sin(45), log(100), 2^10, 10% of 200
Supported functions:
- Trigonometric:
sin,cos,tan - Logarithmic:
log,ln - Mathematical:
sqrt,abs,round,ceil,floor,pow,exp - Constants:
pi,e - Percentage syntax:
X% of Y(calculates X% of Y),X + Y%(increases X by Y%)
Powered by mathjs with high-precision BigNumber support.
Basic Expression Calculator
Examples: 1+2, 100*3, (10+5)/3, 50%
Quick calculation for pure numbers and basic operators (+, -, *, /, %, ()). Lightweight mode without loading math libraries.
Unit Conversion
Examples: 10km to mi, 100kg to lb, 32f to c, 1gb to mb
Supported unit types:
| Category | Unit Examples |
|---|---|
| Length | mm, cm, m, km, in, ft, mi |
| Mass | mg, g, kg, lb, oz, t |
| Volume | ml, l, gal, cup |
| Data | bit, byte, kb, mb, gb, kib, mib, gib |
| Temperature | c(℃), f, k |
Also supports Chinese unit names like 米, 千克, 公斤.
Scientific Constants
Examples: gravity, speed of light, planck constant, π
Built-in physics and mathematics constants library including:
- Speed of light, gravitational acceleration
- Planck constant, Boltzmann constant
- Avogadro's number
- Pi (π)
Displays constant value, unit, source (CODATA 2018), and aliases.
Color Parser
Examples: #ff5500, rgb(255, 100, 50), hsl(30, 100%, 50%), red, blue
Supported color formats:
- HEX:
#RGB,#RRGGBB,#RRGGBBAA - RGB/RGBA:
rgb(r, g, b),rgba(r, g, b, a) - HSL/HSLA:
hsl(h, s%, l%),hsla(h, s%, l%, a) - Named colors:
red,blue,green,orange, etc.
Preview card shows color swatch and automatically converts between HEX, RGB, and HSL formats.
Time Calculator
Examples:
| Scenario | Input Example |
|---|---|
| Time offset | now + 2h, now - 30min |
| Natural language | tomorrow, yesterday, 3 days ago, in 2 weeks |
| Duration conversion | 90min, 2.5h, 180s |
| Date difference | 2024-12-31, 2024-01-01 - now |
Supports multiple time units: seconds (s), minutes (m/min), hours (h/hr), days (d/day), weeks (w/week).
Currency Conversion
Examples: 100 usd to cny, $50 to eur, ¥1000 to jpy
Supported currencies:
| Currency | Code | Symbol |
|---|---|---|
| US Dollar | USD | $ |
| Chinese Yuan | CNY | ¥ / ￥ |
| Euro | EUR | € |
| Japanese Yen | JPY | - |
| Hong Kong Dollar | HKD | - |
| British Pound | GBP | £ |
| Korean Won | KRW | ₩ |
| Bitcoin | BTC | ₿ |
| Ethereum | ETH | Ξ |
Note: Exchange rates are built-in reference values, not real-time data.
Percentage Calculator
Examples:
| Scenario | Input | Result |
|---|---|---|
| Increase | 100 + 20% | 120 |
| Decrease | 100 - 15% | 85 |
| Calculate | 20% of 500 | 100 |
| Percentage math | 30% + 20% | 50% |
Text Statistics
Examples: len "Hello World", count "some text", words "hello"
Trigger keywords: words, chars, len, length, count
Statistics include:
- Character count
- Word count (split by whitespace)
- Chinese character count
- ASCII character count
- Line count
Tips
- Direct input: No prefix needed, CoreBox automatically recognizes content type
- Copy result: Click on preview card to quickly copy the result
- Multiple results: Some abilities (like unit conversion) show multiple common conversions
- Real-time: All previews are calculated in real-time as you type