Les 99 outils, de A à Z
Tous les outils de 99TopTool dans un seul annuaire. Recherchez par nom ou filtrez par catégorie : chaque outil s’ouvre instantanément et fonctionne entièrement dans votre navigateur.
Word Counter
Count words, characters, sentences and reading time as you type.
Character Counter
Track character limits for Twitter/X, SMS, SEO titles and more.
Case Converter
Switch text between UPPER, lower, Title, Sentence, camelCase and more.
Slug Generator
Turn any title into a clean, SEO-friendly URL slug.
Remove Line Breaks
Strip unwanted line breaks from copied text while keeping paragraphs.
Duplicate Line Remover
Delete repeated lines from lists with case and trim options.
Text Sorter
Alphabetise lines A–Z, Z–A, by length or shuffle them randomly.
Find and Replace
Bulk replace text with case, whole-word and regex modes.
Lorem Ipsum Generator
Generate placeholder paragraphs, sentences or words instantly.
Reverse Text
Flip text backwards by characters, words or lines.
Word Frequency Counter
See which words appear most in your text, with stopword filtering.
Reading Time Calculator
Estimate how long any text takes to read or speak aloud.
JSON Formatter
Beautify, validate and minify JSON with precise error locations.
Base64 Encoder / Decoder
Encode or decode Base64 safely, including emoji and non-Latin text.
URL Encoder / Decoder
Percent-encode or decode URLs and query-string values.
HTML Entity Converter
Escape or unescape HTML entities — keep code visible and safe.
Hash Generator
Create MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes instantly.
UUID Generator
Bulk-generate random UUID v4 identifiers with one click.
JWT Decoder
Inspect JWT headers and payloads, with expiry checks.
Regex Tester
Test regular expressions live with highlighted matches and groups.
Cron Expression Explainer
Translate cron schedules into plain English and see next runs.
HTTP Status Code Lookup
Search every HTTP status code with meanings and fix hints.
Code Minifier
Minify HTML, CSS and JavaScript with size savings shown.
Markdown to HTML
Convert Markdown to clean HTML with a live preview.
Age Calculator
Work out exact age in years, months and days — plus birthday countdown.
Date Difference Calculator
Days between two dates, including business days and weeks.
Date Add / Subtract
Add or subtract days, weeks, months or years from any date.
Unix Timestamp Converter
Convert Unix timestamps to human dates — and back, live.
Time Zone Converter
Convert any time between cities and time zones accurately.
Countdown Timer
Count down to any date and event with a live display.
Online Stopwatch
Precision stopwatch with laps — accurate to a hundredth of a second.
Time Calculator
Add or subtract hours, minutes and seconds — timesheet ready.
Percentage Calculator
Three percentage problems solved: of, is-what-percent, and change.
Average Calculator
Mean, median, mode, range and standard deviation in one step.
GCD & LCM Calculator
Greatest common divisor and least common multiple of any numbers.
Prime Number Checker
Test primality and get the full prime factorisation.
Factorial Calculator
Compute n! exactly — even for huge numbers — with digits count.
Logarithm Calculator
Compute logs in any base — 2, e, 10 or custom.
Exponent Calculator
Raise any number to any power, including negatives and fractions.
Square Root Calculator
Square roots and any nth root, to high precision.
Quadratic Equation Solver
Solve ax² + bx + c = 0 with discriminant and complex roots.
Number to Words Converter
Write numbers in words — international and Indian systems.
Ratio Calculator
Simplify ratios and solve for the missing value A:B = C:?
Rounding Calculator
Round numbers up, down or to decimal places — all methods compared.
Fraction Simplifier
Reduce fractions to lowest terms, with decimal and mixed output.
Loan EMI Calculator
Monthly EMI, total interest and payment breakdown for any loan.
Compound Interest Calculator
See your money grow — with optional monthly contributions.
Simple Interest Calculator
Flat-rate interest on principal — quick and transparent.
GST Calculator
Add or remove GST at 5%, 12%, 18%, 28% or any custom rate.
Discount Calculator
Final price after discounts — single or stacked, plus savings.
Tip Calculator
Tip amount and fair per-person split for any bill.
Salary to Hourly Calculator
Convert annual salary to hourly, weekly and monthly rates.
Profit Margin Calculator
Margin, markup and profit from cost and selling price.
Currency Converter
Convert between 30+ currencies with live or manual rates.
ROI Calculator
Return on investment with annualised returns.
SIP Calculator
Project systematic investment plan growth in mutual funds.
BMI Calculator
Body mass index with WHO category and healthy weight range.
BMR & Calorie Calculator
Basal metabolic rate and daily calorie needs at every activity level.
Body Fat Calculator
Estimate body fat percentage with the US Navy tape method.
Ideal Weight Calculator
Target weight from four classic formulas plus healthy BMI range.
Water Intake Calculator
Daily water target from weight, exercise and climate.
Running Pace Calculator
Pace per km, speed and race finish-time predictions.
Image Compressor
Shrink JPG, PNG and WebP files with a quality slider — locally.
Image Resizer
Resize photos to exact pixels with aspect-ratio lock.
Image Converter
Convert between PNG, JPG and WebP in your browser.
Image to Base64
Turn images into data URIs for CSS, HTML and JSON.
Favicon Generator
Create favicon sets from any image — all standard sizes.
Color Converter
Convert colours between HEX, RGB, HSL — with shades palette.
Color Picker
Pick colours from your screen and get instant harmony palettes.
QR Code Generator
Create QR codes for URLs, text, Wi-Fi and contacts — download PNG.
Barcode Generator
Create printable Code 39 barcodes from any text.
CSS Gradient Generator
Design linear and radial CSS gradients with live preview.
Length Converter
Convert metres, feet, inches, miles, km and more instantly.
Weight Converter
Kilograms, pounds, ounces, stones and tonnes — all at once.
Temperature Converter
Celsius, Fahrenheit, Kelvin and Rankine in one glance.
Area Converter
Square metres, acres, hectares, square feet and more.
Volume Converter
Litres, gallons, cups, millilitres — cooking and beyond.
Speed Converter
km/h, mph, m/s, knots and ft/s at a glance.
Data Storage Converter
Bytes, KB, MB, GB, TB — decimal or binary (KiB/MiB/GiB).
Time Unit Converter
Seconds, minutes, hours, days, weeks and years converted.
Energy Converter
Joules, calories, kcal, kWh and BTU in one table.
Pressure Converter
Pascal, bar, psi, atm, mmHg and torr converted.
Frequency Converter
Hz, kHz, MHz, GHz, RPM and radians per second.
Fuel Economy Converter
MPG ↔ L/100km ↔ km/L — the tricky triangle, solved.
Password Generator
Cryptographically strong passwords, built in your browser.
Password Strength Checker
Test password strength, entropy and real-world crack times.
Random Number Generator
Random integers in any range — with or without repeats.
Dice Roller
Roll up to 20 dice — d4, d6, d8, d10, d12, d20 or custom.
Coin Flip
Flip one or many coins — instant heads or tails.
Random Picker
Pick random winners from a list of names or entries.
Lottery Number Generator
Quick-pick lottery numbers for popular games worldwide.
Credit Card Validator
Check card numbers with the Luhn algorithm — offline.
Typing Speed Test
Measure your WPM and accuracy with a 1-minute test.
Morse Code Translator
Translate text to Morse code and back — with audio playback.
Binary Translator
Convert text to binary and binary back to text (UTF-8).
Roman Numeral Converter
Convert numbers to Roman numerals and back — 1 to 3999.
ROT13 & Caesar Cipher
Encode text with ROT13 or any Caesar shift — and brute-force it.
Meta Tag Generator
Generate SEO title, description, Open Graph and Twitter tags.
UTM Link Builder
Build trackable campaign URLs for analytics.
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