415 free tools · 394 guides · zero sign-ups
Free online tools that actually do the job.
Calculators, converters, formatters, and how-to guides — all in your browser, all free forever. From loan and mortgage math to JSON formatters, QR codes, and Pomodoro timers, Free Tool Arena puts every tool you keep Googling on a single page each. No account, no email, no upsell.
Most used this week
All tools →- Money & FinanceLoan Calculator
- Money & FinanceMortgage Calculator
- Money & FinanceCompound Interest Calculator
- Money & FinanceMonthly Budget Calculator
- Developer UtilitiesJSON Formatter
- Developer UtilitiesRegex Tester
- Developer UtilitiesPassword Generator
- Developer UtilitiesQR Code Generator
- ProductivityPomodoro Timer
Curated lists
All curated lists →Curated · 12 tools
Best Free Tools for Freelancers
Free tools for freelancers: invoice generator, freelance rate calculator, tax estimator, cash-flow tracker, and more. No signup, browser-based, works offline.
Curated · 13 tools
Best Free Tools for Students
Free tools for students: Pomodoro timer, word counter, GPA calculator, weekly planner, readability checker, and more. No account, no ads, just the tools.
Curated · 18 tools
Best Free Developer Tools
Free developer tools: JSON formatter, regex tester, JWT decoder, hash generator, UUID generator, cron builder, and more. No signup, all in-browser.
Curated · 13 tools
Best Free SEO Tools
Free SEO tools: SERP snippet preview, schema markup generator, FAQ schema, meta tag generator, headline analyzer, keyword density checker, and more.
Curated · 13 tools
Best Free Finance Calculators
Free finance calculators: mortgage, loan, compound interest, budget, tax, 401(k), Roth IRA, retirement, debt payoff. No signup, in-browser, mobile-friendly.
Popular tools
All tools →Tool · Money & Finance
Tip Calculator
Free tip calculator. Enter the bill, pick a tip percent, split between any number of people. Works on mobile, no ads, instant results.
Tool · Money & Finance
Loan Calculator
Work out monthly payments and total interest on any loan. Enter amount, rate, and term — get a clear breakdown in seconds.
Tool · Money & Finance
Mortgage Calculator
Estimate your monthly mortgage payment, total interest, and payoff schedule. Free, fast, and mobile-friendly.
Tool · Money & Finance
Compound Interest Calculator
See how much your money grows with compound interest. Add starting balance, monthly contributions, and watch the curve.
Tool · Money & Finance
Car Loan Calculator
Free car loan calculator. Enter the vehicle price, down payment, APR, and term to see your monthly payment and total interest before signing.
Tool · Money & Finance
Auto Loan Calculator
Estimate your auto loan payment, total interest, and payoff timeline in seconds. Free, mobile-friendly, no signup.
Popular guides
All guides →Guide · Money & Finance
How to Save Money Fast
Save money fast with 15 tactics that actually work: automate savings, cut three categories, raise your income floor. No gimmicks.
Guide · Money & Finance
The Best Side Hustles for Beginners
Honest side hustle list for beginners: what pays now, what takes months, what's a scam. Time vs money ranked.
Guide · Money & Finance
How to Start Investing With $100
A beginner walkthrough: pick a broker, buy a low-cost index fund, automate. What to avoid. Real numbers.
Guide · Money & Finance
How to Make a Monthly Budget
Build a monthly budget in 20 minutes. The 50/30/20 rule, zero-based, and how to pick what fits your life.
Guide · Money & Finance
How to Pay Off Debt Fast
Compare snowball and avalanche methods with real math. Which wins in dollars, which wins in momentum.
Guide · Money & Finance
How to Build Credit From Zero
Build a credit score from 0 to 700+ with simple moves: secured card, on-time payments, and what to avoid.
Browse by category
Money & Finance
Budget, loan, interest, and paycheck math — in seconds.
81 tools · 65 guides
Productivity
Timers, planners, and routines for focused work.
25 tools · 21 guides
File & Format Converters
PDFs, images, data formats — converted in your browser, offline-safe.
56 tools · 15 guides
Coding & Tech
Learn to code, ship your first project, land the dev job.
19 guides
Career & Growth
Interviews, résumés, promotions, and smart career moves.
13 tools · 14 guides
Health & Fitness
Quick calculators and plain-English habit guides.
27 tools · 37 guides
Writing & Content
Write better, start a blog, grow an audience online.
22 tools · 28 guides
Home & Life
A calmer, cleaner, better-run home life — one habit at a time.
8 tools · 12 guides
Relationships & Social
Friendships, hard conversations, and social skills that travel.
5 guides
Developer Utilities
Formatters, generators, and regex tools for daily dev work.
81 tools · 67 guides
Text & Writing Utilities
Count, format, clean, and convert text in a tab.
39 tools · 13 guides
Unit Converters
Length, speed, temperature, and more — no ads, no math.
17 tools · 13 guides
Random & Fun
Coin flips, dice, and decision makers when you just need an answer.
13 tools · 1 guide
Runs in your browser
Inputs never leave your device. No accounts, no tracking scripts, no cookie wall.
Written to be useful
Short, specific guides — the kind a friend would send you, not a 2,000-word intro.
Fast on any device
Static pages and tiny bundles. Works the same on a slow phone as a desktop.
Last reviewed end-to-end April 2026. See exactly how our tools work →