Free Online Tools for Everyone

300+ free tools including calculators, encoders, generators, and more. No sign-up required.

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Find the right tool for the job

Finance

Mortgage, EMI, compound interest, ROI, and tax calculators

Business & Startup

SaaS runway, MRR projection, LTV, churn, and pricing tools

Text Utilities

Word counter, case converter, JSON formatter, regex tester

Unit & Conversion

Length, weight, temperature, currency, and timezone converters

Creator & Social

Hashtag generator, UTM builder, QR code, SEO preview tools

Image Tools

Compressor, resizer, color picker, format converter, gradient maker

Legal & Documents

Invoice generator, NDA template, privacy policy, contracts

Productivity

Pomodoro timer, decision matrix, meeting cost, planners

Developer

UUID generator, JWT decoder, hash generator, cron builder

Misc & Experimental

BMI calculator, AI prompt cost, sleep cycle, carbon footprint

YouTube

Thumbnail downloader, tag extractor, earnings estimator, SEO tools

Guides & Tutorials

Learn how to get the most out of our tools

SaaS Metrics That Matter: A Founder's Guide

MRR, churn, LTV, CAC — what they mean and why they matter for your startup.

startup analytics

JSON & API Tools: The Developer's Browser-Based Toolkit

Format JSON, decode JWTs, generate UUIDs, and test regex — all from your browser with zero setup.

E-Commerce Pricing & Profit Margins: What Every Seller Needs to Know

Understand markup vs margin, calculate your true COGS, and choose pricing strategies that protect your profit using free calculators.

pricing business-docs

View all guides →

Tool Collections

Curated sets of tools grouped by theme

JSON Tools

Developer-friendly JSON tools: formatter, validator, JSON-to-CSV converter, diff viewer, and more. Free, runs in your browser.

Salary Tools

Calculate your real take-home pay with free salary tools: hourly-to-annual converters, overtime calculators, tax estimators, and freelancer rate finders.

Health Calculators

Track your health with free calculators: BMI, daily calorie needs, macro breakdown, water intake, body fat percentage, and sleep cycle planning.

The Complete Freelancer Toolkit

Everything freelancers need: rate calculators, invoice generators, contract templates, commission calculators, and proposal builders. Free, no sign-up.

Unit Conversion & Math Tools

Convert units and solve math problems: percentages, ratios, proportions, Roman numerals, scientific notation, and area conversions. Free and instant.

Budget & Expense Tracking

Track budgets and split expenses: personal budget trackers, expense splitters, trip cost estimators, meeting cost calculators, and event budget planners.

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