Free Online Tools
That Actually Work
No signup. No tracking. No bloat. Just fast, browser-based tools that do one job well.
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✓ No Signup
✓ Works Offline
✓ 66+ Tools
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Security & Random
Text Tools
View all →📊
Word Counter Live
Count words, characters, sentences and get reading time.
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Character Counter Live
Check limits for Twitter, SMS, Instagram, and LinkedIn.
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Lorem Ipsum Generator Live
Generate paragraphs, sentences or words of placeholder text instantly.
Aa
Text Case Converter Live
UPPER, lower, Title, camelCase, snake_case, kebab-case and more.
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Reading Time Calculator Live
Estimate how long it takes to read any text at different reading speeds.
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Word Frequency Counter Live
See how often each word appears in your text, sorted by frequency.
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Word Sorter Live
Alphabetize any list of words or items instantly.
Calculators
View all →%
Percentage Calculator Live
Calculate %, percentage change, and add or remove %.
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Age Calculator Live
Your exact age in years, months, days — plus birthday countdown.
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BMI Calculator Live
Body Mass Index with WHO categories. Metric and imperial.
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Tip Calculator Live
Calculate tip and split the bill between any number of people.
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Date Calculator Live
Days between two dates, add or subtract time from any date.
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GPA Calculator Live
Calculate your GPA on the 4.0 scale. Add courses, grades, and credits.
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Compound Interest Live
See how savings grow with compound interest and monthly contributions.
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Loan Calculator Live
Monthly payment and amortization for any loan type.
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Dice Roller Live
Roll D4, D6, D8, D10, D12, D20, D100 with modifiers and history.
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Discount Calculator Live
Calculate sale prices, savings, or find what % off something is.
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Calorie Calculator Live
Calculate daily calorie needs based on age, weight, and activity level.
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Mortgage Calculator Live
Calculate monthly mortgage payments, total interest, and amortization.
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Simple Interest Calculator Live
Calculate interest earned and total amount using I = Prt.
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Countdown Timer Live
Count down to any event, holiday, or deadline. Also a stopwatch.
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Aspect Ratio Calculator Live
Find ratios, scale dimensions proportionally, or pick from common presets.
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Savings Calculator Live
Calculate how long to reach your savings goal with interest.
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Investment Calculator Live
Future value with monthly contributions at any return rate.
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Retirement Calculator Live
Estimate your retirement nest egg and target savings.
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Grade Calculator Live
Weighted final grade across homework, tests, and assignments.
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Fuel Cost Calculator Live
Gas cost for any road trip by distance and MPG.
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Body Fat Calculator Live
Estimate body fat % with the U.S. Navy circumference method.
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Pace Calculator Live
Running pace, finish time, and distance for 5K to marathon.
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Statistics Calculator Live
Mean, median, mode, range, variance, and standard deviation.
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Sales Tax Calculator Live
Add or remove sales tax from any price. Includes US state rates.
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Inflation Calculator Live
See how inflation erodes purchasing power over time.
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Loan Payoff Calculator Live
See how extra payments reduce loan term and total interest paid.
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Time Duration Calculator Live
Calculate hours and minutes between any two times. Subtract breaks.
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VAT Calculator Live
Add or remove VAT. Includes all EU country VAT rates.
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Scientific Calculator Live
Full scientific calculator with trig, log, powers, and more.
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Salary Calculator Live
Convert hourly to annual salary and estimate take-home pay.
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Average Calculator Live
Mean, median, mode, and weighted average of any numbers.
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Fraction Calculator Live
Add, subtract, multiply, and divide fractions with steps.
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Ratio Calculator Live
Simplify ratios, scale them, and solve proportions.
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Mortgage Amortization Live
See your full mortgage payment schedule month by month.
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Prime Number Checker Live
Check if a number is prime and find its prime factors.
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Bill Splitter Live
Split any bill with tip between any number of people.
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Converters
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Temperature Converter Live
Convert Celsius, Fahrenheit, Kelvin, and Rankine instantly.
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Time Zone Converter Live
Convert time between any two time zones. Live world clock.
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Unit Converter Live
Convert length, weight, volume, temperature, area and speed.
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Binary Converter Live
Convert between binary, decimal, hex and octal. Text to binary too.
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Roman Numeral Converter Live
Convert numbers to Roman numerals and vice versa (1–3,999).
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Currency Converter Live
Convert between 25+ world currencies with reference rates.
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Number to Words Live
Convert numbers to English text for checks and legal docs.
Developer Tools
View all →{ }
JSON Formatter Live
Format, validate, and minify JSON with error detection.
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QR Code Generator Live
QR codes for URLs, text, email, phone, Wi-Fi. Download PNG.
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Color Picker Live
Pick any color and get HEX, RGB, and HSL values instantly.
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Base64 Encoder Live
Encode text to Base64 or decode Base64 back to plain text.
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URL Encoder Live
Percent-encode URLs or decode encoded strings back to text.
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Regex Tester Live
Test and debug regular expressions in real time with match highlighting.
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Hash Generator Live
Generate SHA-256, SHA-512, SHA-1, and SHA-384 hashes from any text.
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UUID Generator Live
Generate random UUID v4 values. Single or bulk output.
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Text to Binary Live
Convert text to binary code and binary back to text.
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Unix Timestamp Converter Live
Convert Unix epoch timestamps to human-readable dates and back.
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Password Strength Checker Live
Check password entropy, crack time, and get improvement tips.
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Color Contrast Checker Live
Check WCAG 2.1 AA/AAA contrast compliance for accessible design.
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Hex to RGB Converter Live
Convert hex color codes to RGB, HSL, and CMYK values.
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CSS Gradient Generator Live
Build linear and radial CSS gradients with live preview.
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Why choose ToolFlash?
Instant Results
All calculations happen in your browser. No server, no waiting, no delays.
Private by Design
Your data never leaves your device. We don't track, store, or sell anything you type.
Works Everywhere
Fully responsive on mobile, tablet, and desktop. No app to install.
Always Free
No subscriptions, no premium tiers, no hidden fees. Every tool is free, forever.
📖 Latest from the Blog
All articles →Frequently Asked Questions
Are ToolFlash tools really free?
Yes, completely. Every tool on ToolFlash is free to use — there are no premium plans, no credit limits, and no features hidden behind a paywall. The site is supported by display advertising.
Do I need to create an account?
No account required. Every tool works immediately — just open the page and start using it. We don't ask for your email address, and there's nothing to install.
Is my data private when I use these tools?
Yes. All calculations happen directly in your browser — nothing you type is sent to our servers. Your text, passwords, and numbers stay on your device.
Do these tools work on mobile?
Yes. All ToolFlash tools are fully responsive and tested on mobile devices. They work in any modern mobile browser without requiring an app download.
Can I request a new tool?
Yes. Use the contact form to send us a tool request. We read every message and prioritise tools that are most requested.