Images & Video
Free QR Code Generator: URL, UPI, WhatsApp and Wi-Fi QR Codes
Make free static QR codes for links, UPI payments, WhatsApp chats, Wi-Fi and maps, with print sizes, error correction and how to spot fake UPI QR stickers.
10 min read
Blog
Practical guides on money, documents, images, writing and code, and how to get a reliable answer from our free tools.
Students & Study
CGPA to Percentage: The Correct Formula for CBSE and Universities
For a CBSE CGPA, percentage = CGPA × 9.5 (8.6 = 81.7%). Universities set their own rules, such as × 10 or (CGPA − 0.75) × 10. How to find and use yours.
7 min read
SEO & Marketing
How to Create a UPI QR Code for Your Shop (and Avoid QR Fraud)
Make a free UPI QR code from your UPI ID, print it at the right size, confirm payments safely, and see when the new UPI MDR applies to merchants.
9 min read
Tips & Guides
Age Calculator: How to Find Your Exact Age in Years, Months and Days
Count whole years, then whole months, then the days left. Born 31 March 1990? On 15 October 2026 you are 36 years, 6 months, 15 days. Month-end and 29 Feb rules.
7 min read
SEO & Marketing
CPM, CTR, Conversion Rate, ROAS and ROI Explained (With Benchmarks)
Every ad metric from CPM to break-even ROAS, worked through one Indian D2C campaign in rupees, with sourced 2026 benchmarks and how to tell which lever to fix.
8 min read
Tips & Guides
Unit Conversion Cheat Sheet: Length, Weight, Area, Volume, Speed and Data
Exact factors for everyday conversions: 1 inch = 2.54 cm, 1 kg = 2.2046 lb, 1 sq m = 10.764 sq ft, °F = °C × 9/5 + 32, and why 500 GB shows as 465 GB.
6 min read
Text & Writing
Change Uppercase to Lowercase (and Back): Case Converter Guide
Paste text into the case converter for UPPERCASE, lowercase, Title Case and Sentence case at once, or use Shift+F3 in Word and =LOWER() in Excel.
7 min read
Students & Study
How to Calculate Percentage: Formulas, Examples and Shortcuts
X% of Y = Y × X ÷ 100. X as a % of Y = X ÷ Y × 100. % change = (new − old) ÷ old × 100. Worked examples, reverse percentages and mental shortcuts.
6 min read
Tips & Guides
How to Create a Strong Password (NIST 2025 Rules and Entropy Table)
Make it long, random and unique: 16+ generated characters in a password manager, or 5–6 random words you can remember. NIST's 2025 rules, 2FA and passkeys.
9 min read
Data & Developers
Common JSON Errors: The Real Messages and How to Fix Each One
Trailing commas, single quotes, comments, NaN, bad escapes, a hidden BOM and cut-off data: the exact Chrome, Firefox and Python errors for each, with the fix.
9 min read
Data & Developers
15 Free Developer Tools That Replace a Dozen Browser Tabs
JSON formatting, Base64, JWT decoding, hash generation, regex testing and more — the everyday developer utilities, all in one place and all running locally.
2 min read
Students & Study
Binary to Text Translator: How to Decode Binary Code (With Examples)
How computers turn 1s and 0s into letters, how to convert binary to text and back, and free translators for binary, hex and Morse.
2 min read