Clean, format, and transform text — plus health, finance, and conversion calculators. Every tool runs entirely in your browser using JavaScript. Your data never touches a server.
Every tool runs client-side. Your text, numbers, and data stay on your device — we never see them.
No accounts, no paywalls, no usage limits. All tools are free to use, forever.
From text cleanup to health calculations — each tool solves a specific problem with no unnecessary complexity.
Create strong, random passwords with customizable length and character sets.
🔥 PopularJoin lines into a single paragraph by removing all line breaks.
🔥 PopularCalculate Body Mass Index with US (lb/in) or metric (kg/cm) units.
🔥 PopularConvert length, weight, volume, temperature, speed, area, and pressure.
🔥 PopularGet detailed statistics on your text – characters, words, lines, and more.
🔥 PopularGenerate custom QR codes for URLs, Wi-Fi, contacts, and more.
🔥 PopularDetect your browser, OS, device, screen size, and public IP address instantly.
🆕 NewConvert text to Morse code and back with audio playback support.
🆕 NewCheck WCAG AA/AAA contrast ratios for accessible color combinations.
🆕 NewCalculate missing dimensions from any ratio. Presets for 16:9, 4:3, 1:1, and more.
🆕 NewConvert CSV to JSON or JSON to CSV with custom delimiters. All in your browser.
🆕 NewWrite markdown on the left, see rendered HTML on the right — updates live as you type.
🆕 NewEncode text or files to Base64 or decode Base64 back. Supports data URIs.
⭐ FeaturedFormat, minify, and validate JSON with detailed error reporting.
⭐ FeaturedConvert between HEX, RGB, HSL, and named CSS colors with live preview.
⭐ FeaturedCompare two texts side-by-side with added/removed line highlighting.
⭐ FeaturedConvert between binary, octal, decimal, and hexadecimal instantly.
⭐ FeaturedAnalyze password strength with entropy, crack time, and improvement tips.
⭐ FeaturedGenerate custom QR codes for URLs, Wi-Fi, contacts, and more. Customize colors and size.
Create strong random passwords with customizable length and character sets.
Generate UUID v4 and v7 identifiers with customizable output format.
Generate placeholder text by paragraphs, sentences, or words.
Compute SHA-256, SHA-512, SHA-1, and MD5 hashes in your browser.
Analyze passwords with entropy, crack time, and improvement tips.
Join lines into a single paragraph by removing all line breaks.
Convert text to uppercase, lowercase, title case, or sentence case.
Trim leading/trailing whitespace and collapse multiple spaces.
Reverse the entire text, each line, or the order of lines.
Get detailed statistics on your text – characters, words, lines, and more.
Find specific text and replace it with something else.
Strip duplicate lines from your text while preserving order.
Sort lines alphabetically (A–Z or Z–A) with optional case-insensitivity.
Prefix each line with a number or strip existing line numbers.
Convert text into a URL-friendly slug (lowercase, hyphenated).
Format and fold JSON, HTML, CSS, JS, XML, SQL & PHP — with code folding.
Decode PHP serialized strings into readable JSON for debugging and inspection.
Compare two texts with added and removed line highlighting.
Calculate Body Mass Index with US (lb/in) or metric (kg/cm) units.
Calculate exact age in years, months, days, hours, and seconds.
Convert length, weight, volume, temperature, speed, area, and pressure.
Calculate percentages, increases, decreases, and proportions.
Calculate sale prices and savings after discounts and tax.
Calculate tip amounts and split bills between multiple people.
Estimate trip fuel costs by distance, MPG, and fuel price.
Calculate basal metabolic rate and daily calorie needs with US or metric units.
Calculate grade point average with letter grades and credit hours.
Calculate monthly installments and see amortization schedules.
Convert between cups, tablespoons, ounces, grams, and more.
Calculate running pace, speed, distance, or time.
Generate random numbers with custom ranges and options.
Calculate days, weeks, months, and years between dates.
Calculate the exact duration between two dates and times.
Encode or decode HTML entities like & < > " safely.
Percent-encode or decode URLs and query parameters.
Strip comments and whitespace from JavaScript to reduce file size.
Test regular expressions against text with match highlighting.
Parse browser, OS, and device details from any user agent string.
Convert between YAML and JSON formats bidirectionally.
Encode files and text to Base64 or decode Base64 back to readable form.
Format, minify, and validate JSON with line-level error messages.
Check if a number is prime, find prime factors, or list primes up to N.
Convert between Arabic numbers and Roman numerals (1–3999).
Compute mean, median, mode, variance, and standard deviation.
Count and round numbers to a specified number of significant figures.
Add, subtract, multiply, and divide fractions with simplification.
Convert between binary, octal, decimal, and hex with BigInt support.
Create linear and radial gradients with live preview and generated CSS.
Design box shadows visually with offset, blur, spread, and color controls.
Generate border-radius CSS with per-corner control and live preview.
Generate harmonious color schemes based on color theory.
Convert between HEX, RGB, HSL, and named colors with live swatch.
Upload an image and pick colors to get HEX, RGB, and HSL values.
Resize images with aspect ratio lock and quality control.
Convert images to grayscale, sepia, duotone, or invert colors.
Convert images between PNG, JPEG, WebP, GIF, and BMP formats.
Check if text reads the same forwards and backwards.
Count characters, words, sentences, and check social media post limits.
Count down to any future date and time with live updates.
Precision stopwatch with lap times using smooth requestAnimationFrame.
Flip a coin or roll dice (D4–D20) with animation and statistics.
Enter choices and let the wheel spin to pick one at random.
Measure your typing speed in WPM with real-time accuracy tracking.
View current time across multiple time zones with DST detection.
Convert times between any two time zones worldwide.
Calculate compound investment growth with monthly contributions.
Convert between hourly, daily, weekly, monthly, and yearly salary.
TL3 Tools is a collection of free, browser-based utilities built by TL3 Communications. We created these tools because we believe online utilities should be fast, private, and straightforward — no accounts, no data uploads, no unnecessary complexity.
Every tool runs entirely in your browser. Text processing happens client-side using JavaScript. Calculator results are computed locally. We never see, store, or transmit the data you enter. Your privacy is baked into the design.
New tools are added regularly. Have a suggestion? Let us know.