Tech, finance & everyday terms explained simply — free, no sign-up.
What is a hex color code? #RRGGBB explained, the #RGB shorthand, and how designers use hex codes daily. Pick colors.
Read →What is a meta tag? Title, description and Open Graph tags explained — how they shape Google snippets and social.
Read →What is a password manager? How encrypted vaults and password entropy (bits) keep your accounts safe. Generate strong.
Read →What is a QR code? Invented by Denso Wave in 1994 — how QR codes store data, static vs dynamic types, and everyday.
Read →What is a UUID? The v4 format (xxxxxxxx-xxxx-4xxx-...) explained and why collisions are practically impossible..
Read →What is amortization? How loan payments split into interest and principal, and the annuity formula explained. Plan.
Read →What is an IBAN? Learn the IBAN structure, country lengths and the MOD-97 check digit. Validate any IBAN free with our.
Read →What is Base64? How binary data becomes safe ASCII text, padding with = explained, and where it's used. Encode and.
Read →What is BMI? The kg/m² formula and WHO categories explained — underweight to obese. Check your BMI free with our BMI.
Read →What is compound interest? The A = P(1+r)^n formula and the rule of 72 explained with examples. Watch savings grow with.
Read →What is exchange rate markup? Mid-market rate vs the rate you're offered — how providers hide fees in the spread..
Read →Gross vs net salary explained: income tax, social charges and what actually lands in your account, with EU examples..
Read →What is JSON? Syntax, objects and arrays explained, and how JSON compares with XML. Format and validate JSON free with.
Read →What is nisab in zakat? The gold (87.48g) and silver (612.36g) thresholds explained simply. Calculate your zakat free.
Read →What is OCR? How optical character recognition turns scans into editable text, and what affects accuracy. Explore free.
Read →What is PDF/A? The ISO archival standard that keeps documents readable for decades — required by EU governments..
Read →What is SEPA? The 36-country euro payments zone, SEPA transfers and SEPA Instant explained simply. Validate your IBAN.
Read →What is the Hijri calendar? The 354/355-day lunar calendar, its 12 months, and why Ramadan moves each year. Convert any.
Read →What is the qibla? The direction of the Kaaba in Mecca and how the prayer bearing is calculated from your location..
Read →What is VAT? How value-added tax works, EU rates from 17% in Luxembourg to 27% in Hungary, and the reverse charge rule..
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