Every tool you need.
In one place.
44 free, fast calculators, converters and generators. No sign-up. No clutter.
Popular: Salary Calculator · CTC to In-Hand · PF Calculator
Popular categories
Free AI Agents & n8n Workflows
View all →Industry-specific AI agent prompts with a ready-to-import n8n workflow -- download the prompt, download the workflow, plug in your own credentials.
Real Estate Lead Qualifier Agent
Qualifies inbound property inquiries automatically and routes hot leads to your team instantly.
Property Listing Description Agent
Turns raw property details into a polished listing description, ready for your approval before it goes live.
Abandoned Cart Recovery Agent
Drafts a personalized abandoned-cart recovery message based on the actual items left behind.
Featured tools
Age Calculator
Calculate your exact age in years, months and days from your date of birth.
JSON Formatter
Format, validate and beautify JSON instantly with syntax highlighting.
Password Generator
Generate strong, random, cryptographically secure passwords instantly.
EMI Calculator
Calculate your monthly loan EMI, total interest and total repayment.
GST Calculator
Calculate GST amount and total price, inclusive or exclusive of tax.
Percentage Calculator
Calculate percentages, percentage of a number, and percentage change.
Discount Calculator
Calculate the final price and amount saved after a percentage discount.
Profit Calculator
Calculate profit or loss amount and percentage from cost and selling price.
BMI Calculator
Calculate your Body Mass Index and see your weight category.
JWT Decoder
Decode a JWT's header and payload without verifying the signature.
Regex Tester
Test regular expressions against sample text and see every match highlighted.
UUID Generator
Generate one or many cryptographically random UUID v4 identifiers.
Word Counter
Count words, characters, sentences and estimated reading time.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, camelCase and more.
Color Picker & Converter
Convert HEX colors to RGB and HSL, and find the complementary color.
QR Code Generator
Generate a downloadable QR code from any text, URL or contact info.
Trending now
Age Calculator
Calculate your exact age in years, months and days from your date of birth.
JSON Formatter
Format, validate and beautify JSON instantly with syntax highlighting.
Percentage Calculator
Calculate percentages, percentage of a number, and percentage change.
BMI Calculator
Calculate your Body Mass Index and see your weight category.
Date Difference Calculator
Calculate the exact number of days, weeks, months and years between two dates.
Word Counter
Count words, characters, sentences and estimated reading time.
How our calculators work
Financial calculators on AlfennAI are built from official rules, tested against verified examples, and show their assumptions next to every result. Salary, HRA, PF, gratuity and professional tax estimates explain what is included, what is not, and where to verify regulated rules.
Frequently asked questions
Is AlfennAI free to use?
Yes, every tool is completely free with no sign-up required.
Do you store the data I enter into tools?
No. Calculators and converters run in your browser. Your inputs are never sent to a server, stored, or used for analytics.
Are financial calculator results exact?
No. They are estimates based on simplified models of official rules. Always verify regulated tax and labour rules against official sources or a professional before relying on them.
How often are new tools added?
New tools are added regularly across all categories, from calculators to developer utilities.