JSON Formatter
Pretty print, minify, validate, and sort JSON online.
JSON
OpenFree online tools
Free Online Tools & Calculators
47+ calculators, converters, and utilities for finance, health, school, writing, and code. Every tool runs in your browser — nothing you type is ever sent to a server.
- Free to use
- No account required
- Private browser tools
Popular tools
Most-used utilities across every category.
JWT Decoder
Decode JWT header and payload segments without verification.
Security
OpenUUID Generator
Generate UUID v4 values in bulk.
Developer Utilities
OpenBase64 Encoder
Encode text to Base64 online.
Encoding
OpenTimestamp Converter
Convert Unix timestamps and ISO 8601 dates.
Date & Time
OpenRegex Tester
Test JavaScript regular expressions against sample text.
Text
OpenSQL Formatter
Beautify SQL for MySQL, PostgreSQL, and generic SQL.
Database
OpenAge Calculator
Calculate exact age from a date of birth to today or any comparison date, with years, months, days, and total days.
Calculators
OpenBMI Calculator
Calculate body mass index from weight in kilograms and height in centimeters, with a general BMI category.
Health
OpenEveryday calculators
Quick calculators for percentages, ages, dates, and common math.
Finance & money tools
Estimate loans, mortgages, savings, interest, and everyday money math.
Savings Calculator
Estimate how savings may grow from an initial balance, monthly deposits, annual interest rate, and time horizon.
Finance
OpenLoan Calculator
Estimate monthly loan payments, total paid, and total interest from loan amount, annual rate, and term.
Finance
OpenCompound Interest Calculator
Calculate compound interest and final amount from principal, annual rate, time, and compounding frequency.
Finance
OpenDiscount Calculator
Calculate sale price and savings after a discount.
Finance
OpenTip Calculator
Calculate tip amount, total bill, and split per person.
Finance
OpenSalary Calculator
Convert hourly, monthly, and annual pay estimates.
Finance
OpenHealth & student tools
BMI, calorie, and due-date calculators alongside GPA and grade tools.
BMI Calculator
Calculate body mass index from weight in kilograms and height in centimeters, with a general BMI category.
Health
OpenCalorie Calculator
Estimate daily calories from body stats and activity.
Health
OpenPregnancy Due Date Calculator
Estimate due date from the first day of the last period.
Health
OpenGPA Calculator
Calculate weighted GPA from grade points and credits.
Education
OpenGrade Calculator
Calculate weighted course grade from scores and weights.
Education
OpenJSON and data tools
Format, validate, compare, and convert structured data.
JSON Formatter
Pretty print, minify, validate, and sort JSON online.
JSON
OpenJSON Validator
Validate JSON syntax instantly in your browser.
JSON
OpenJSON to CSV
Convert JSON arrays to CSV with flattened nested objects.
JSON
OpenJSON to YAML
Convert JSON to YAML with nested object support.
JSON
OpenJSON Diff Checker
Compare two JSON documents side by side.
JSON
OpenEncoding and developer utilities
Decode, encode, generate IDs, and handle common development tasks.
Base64 Encoder
Encode text to Base64 online.
Encoding
OpenBase64 Decoder
Decode Base64 text online.
Encoding
OpenURL Encoder
URL-encode text for query strings and paths.
Encoding
OpenUUID Generator
Generate UUID v4 values in bulk.
Developer Utilities
OpenColor Converter
Convert colors between HEX, RGB, and HSL.
Developer Utilities
OpenBrowse by category
Every tool on Wraplet, organized by what you're trying to do.
JSON
Format, validate, convert, and compare JSON data.
Security
Decode tokens and generate cryptographic hashes.
Encoding
Encode and decode Base64, URLs, and other formats.
Text
Test regex patterns and generate placeholder text.
Date & Time
Convert between Unix timestamps and ISO 8601 dates.
Database
Format and beautify SQL queries.
Developer Utilities
Handy generators and converters for everyday development.
Calculators
Quick everyday calculators for percentages, ages, and common math.
Finance
Estimate savings, loans, interest, tax, and practical money calculations.
Health
Helpful wellness calculators with clear, non-diagnostic results.
Education
Student tools for grades, GPA, and study calculations.
Converters
Convert units, image sizes, ratios, and everyday measurements.
Daily Tools
Small practical tools for daily tasks and quick decisions.
Tool collections
Focused pages for common searches and workflows.
Free Online Calculators
Use free online calculators for age, percentages, dates, BMI, finance, school, and everyday math.
Free Finance Calculators
Estimate loan payments, savings growth, compound interest, discounts, salaries, mortgage payments, VAT, fuel costs, and electricity costs.
Free Health Calculators
Use free health calculators for BMI, calorie estimates, and pregnancy due date estimates with clear limitations.
Free Text Tools
Count words and characters, convert text case, generate placeholder text, and test regular expressions in your browser.
Free Date and Time Tools
Calculate date differences, business days, birthday countdowns, timestamps, and time zone conversions.
Free Student Tools
Use free student tools for GPA, weighted grades, percentages, word counts, date planning, and unit conversions.
Free Online Converters
Convert units, image sizes, aspect ratios, colors, URLs, Base64, JSON, and other common formats.
Free Daily Tools
Use practical daily tools for QR codes, passwords, random numbers, quick calculations, and everyday decisions.
Free JSON Tools
Format, validate, compare, and convert JSON in your browser with free developer utilities from Wraplet.
Free JWT Decoder
Decode JWT payloads, inspect token claims, and generate hashes locally in your browser.
Free Base64 and URL Tools
Encode and decode Base64 strings, URLs, and web-safe text locally with Wraplet.
Free UUID Generator
Generate UUID values quickly for development, testing, fixtures, and database records.
Free SQL Formatter
Format SQL queries for readability and debugging with a private browser-based SQL formatter.
Free Regex Tester
Test regular expressions and inspect matches in your browser with a fast regex utility.
Free Timestamp Converter
Convert Unix timestamps and ISO dates with a browser-based date and time utility.
Free Online Developer Tools
A fast collection of private browser-based tools for JSON, JWT, Base64, SQL, regex, UUIDs, timestamps, and more.
Latest from the blog
Daily articles for calculators, developer tools, formulas, and SEO workflows.
Online tools
Best Free Online Tools and Calculators in Pakistan (No Sign-Up)
A practical roundup of free online tools and calculators useful in Pakistan for students, freelancers, and developers, all private and with no account needed.
Read articleEveryday calculators
How to Estimate Your Electricity Bill in Pakistan
Learn how electricity units are billed in Pakistan, how slab tariffs and taxes affect the total, and how to estimate your monthly bill before it arrives.
Read articleEducation calculators
How to Calculate GPA and CGPA in Pakistan (HEC 4.0 Scale)
Learn how to calculate your semester GPA and cumulative CGPA on the Pakistan HEC 4.0 scale, with grade points, credit hours, and worked examples.
Read articleFAQ
Common questions about Wraplet and our developer tools.
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