All Tools
Browse every free tool on utoline — 57 tools across 10 categories.
Word Counter
Count words, characters, sentences and paragraphs in real time, plus estimated reading and speaking time.
Text ToolsCharacter Counter
Count characters, characters without spaces, words and lines instantly — useful for meeting title tags, bios and SMS limits.
Text ToolsCase Converter
Convert text between UPPERCASE, lowercase, Title Case, Sentence case, aLtErNaTiNg case and more with one click.
Text ToolsRemove Duplicate Lines
Remove duplicate lines from a list while preserving the first occurrence, with case-sensitivity, trimming and sorting options.
Text ToolsText Sorter
Sort lines of text alphabetically or numerically, reverse line order, remove duplicates, or shuffle lines randomly.
Text ToolsText Cleaner
Clean up messy text: remove extra spaces, blank lines, special characters and normalize line breaks.
Text ToolsJSON Formatter & Validator
Format, minify and validate JSON with clear error messages and adjustable indentation.
Developer ToolsBase64 Encoder / Decoder
Encode text to Base64 or decode Base64 back to text, with correct handling of Unicode characters.
Developer ToolsURL Encoder / Decoder
Percent-encode or decode URLs and query string components.
Developer ToolsHTML Encoder / Decoder
Convert text to HTML entities or decode HTML entities back to plain text.
Developer ToolsUUID Generator
Generate random UUID v4 values using your browser’s cryptographically secure random number generator.
Developer ToolsTimestamp Converter
Convert between Unix timestamps and human-readable dates, in both seconds and milliseconds, local time and UTC.
Developer ToolsRegex Tester
Test regular expressions against sample text with live match highlighting and capture groups.
Developer ToolsHash Generator
Generate SHA-1, SHA-256, SHA-384 and SHA-512 hashes of text using your browser’s built-in cryptography.
Developer ToolsPercentage Calculator
Calculate X% of Y, percentage increase or decrease, and percentage difference between two numbers.
CalculatorsDiscount Calculator
Work out the discount amount and final price from an original price and discount percentage.
CalculatorsGST / Sales Tax Calculator
Calculate GST or sales tax both ways: add tax to a base price, or extract the base price from a tax-inclusive amount, at any rate.
CalculatorsEMI / Loan Calculator
Calculate your monthly loan installment (EMI), total interest and total payment from principal, rate and tenure.
CalculatorsAge Calculator
Calculate exact age in years, months and days between a date of birth and any target date, plus days until next birthday.
CalculatorsBMI Calculator
Calculate Body Mass Index from height and weight in metric or imperial units, with the standard BMI category.
CalculatorsTip Calculator
Calculate the tip amount, total bill, and per-person split for any bill amount, tip percentage and group size.
CalculatorsPercentage Change Calculator
Calculate the percentage increase or decrease between an old value and a new value.
CalculatorsAverage Calculator
Calculate the mean, median, mode and range of a list of numbers.
CalculatorsRatio Calculator
Simplify ratios to their lowest terms, or scale a ratio to match a target value.
CalculatorsTime Duration Calculator
Calculate the duration between two times, or add/subtract hours and minutes from a time.
CalculatorsLength Converter
Convert between millimeters, centimeters, meters, kilometers, inches, feet, yards and miles.
Converter ToolsWeight Converter
Convert between milligrams, grams, kilograms, ounces, pounds, stone and metric tons.
Converter ToolsTemperature Converter
Convert between Celsius, Fahrenheit and Kelvin instantly.
Converter ToolsArea Converter
Convert between square meters, square feet, acres, hectares and more.
Converter ToolsVolume Converter
Convert between milliliters, liters, cubic meters, cups, gallons and more.
Converter ToolsSpeed Converter
Convert between meters/second, km/h, mph, knots and feet/second.
Converter ToolsData Storage Converter
Convert between bits, bytes, kilobytes, megabytes, gigabytes and terabytes — with correct decimal (1000) vs binary (1024) distinctions.
Converter ToolsDate Difference Calculator
Calculate the exact number of days, weeks, months and years between two dates.
Date & Time ToolsAdd / Subtract Days from Date
Add or subtract a number of days, weeks or months from a date to find the resulting date.
Date & Time ToolsCountdown Calculator
See exactly how much time is left until any future date and time, updated live.
Date & Time ToolsTime Zone Converter
Convert a date and time from your local time zone to any other major time zone.
Date & Time ToolsMeta Tag Generator
Generate HTML meta tags for title, description, keywords, canonical URL and robots directives.
SEO ToolsOpen Graph Meta Generator
Generate Open Graph and Twitter/X meta tags for rich social media link previews.
SEO ToolsRobots.txt Generator
Generate a valid robots.txt file to control which search engine crawlers can access your site.
SEO ToolsSitemap Generator
Generate a valid XML sitemap from a list of URLs you provide.
SEO ToolsSERP Snippet Preview
Preview how your page title and description might appear as a search result snippet, on desktop and mobile widths.
SEO ToolsPassword Generator
Generate strong, random passwords using your browser’s cryptographically secure random number generator. Nothing is stored or transmitted.
Security & Privacy ToolsPassword Strength Checker
Check how strong a password is, entirely on your device — the password is never transmitted or stored.
Security & Privacy ToolsRandom String Generator
Generate random alphanumeric strings for tokens, test data or unique identifiers.
Security & Privacy ToolsQR Code Generator
Generate a scannable QR code from a URL, plain text, email address or phone number, and download it as a PNG.
Miscellaneous ToolsLorem Ipsum Generator
Generate placeholder Lorem Ipsum text by paragraphs, sentences or words for use in mockups and designs.
Miscellaneous ToolsRandom Number Generator
Generate one or more random numbers within a custom range, with optional duplicate exclusion.
Miscellaneous ToolsColor Converter & Picker
Convert colors between HEX, RGB and HSL, or pick a color visually with a live preview.
Miscellaneous ToolsText to Slug Generator
Convert any text into a clean, URL-friendly slug for blog posts, product pages or file names.
Miscellaneous ToolsMicrophone Test
Test your microphone online with a live waveform and sound-level meter. Audio stays in your browser and is never recorded, stored or uploaded.
Miscellaneous ToolsImage Compressor
Compress JPG, PNG and WebP images in your browser to reduce file size, with a live before/after comparison. Images never leave your device.
Image ToolsImage Resizer
Resize images to exact dimensions or common presets, with optional aspect-ratio lock, entirely in your browser.
Image ToolsImage Cropper
Crop images to a free-form selection or common aspect ratios like square, 4:3 and 16:9, directly in your browser.
Image ToolsImage Format Converter
Convert images between JPG, PNG and WebP formats directly in your browser, based on what your browser can actually encode.
Image ToolsPDF Merge
Combine multiple PDF files into a single document, in the order you choose, directly in your browser.
PDF ToolsPDF Split & Page Extractor
Extract specific pages or page ranges from a PDF into a new document, directly in your browser.
PDF ToolsPDF Rotate
Rotate all or selected pages of a PDF by 90, 180 or 270 degrees, directly in your browser.
PDF Tools