General Utilities
102 free tools in this category.
Quadratic Equation Solver
Solve quadratic equations ax² + bx + c = 0 with the discriminant method.
Prime Number Checker
Check whether a number is prime — and find its smallest factor if not.
Couple Name Combiner
Combine two names into cute couple (ship) names.
Markdown Editor
Write Markdown with a live preview side by side.
Date Formatter
Format any date in DD/MM/YYYY, ISO, long and short styles.
YAML Validator
Check whether your YAML is valid (basic parser).
Birthday Countdown
Count down to your next birthday — live days, hours, minutes and seconds.
Cubic Equation Solver
Solve any cubic equation ax³ + bx² + cx + d = 0.
Remove Emojis
Strip all emojis from a text, keeping the words.
CSV Viewer
View CSV data as a clean table.
Markdown Preview
Preview Markdown as rendered HTML, live as you type.
Color Contrast Checker
Check color contrast ratio and WCAG AA/AAA pass or fail.
Zodiac Sign Finder
Find your zodiac sign from your date of birth.
Extract Phone Numbers
Pull out all phone numbers hidden in a text.
Dog Age to Human Years
Convert a dog’s age into human years (modern log formula).
YAML Formatter
Format YAML — fix spacing after colons and trailing whitespace.
CSV Formatter
Format CSV data — trim cells and normalize rows.
Time Formatter
Format seconds/minutes/hours into HH:MM:SS and all units.
Braille Translator
Translate text to Braille and Braille back to text.
Line Counter
Count lines, words, characters and more in any text.
Palindrome Checker
Check if a word or sentence reads the same backwards.
Extract URLs
Extract all web links (URLs) from any text.
URL Extractor
Extract all URLs from any text.
Budget Planner
Plan a monthly budget: income, expenses, savings and the 50/30/20 split.
Extract Numbers
Pull out all numbers found in a text.
User Agent Parser
Parse a browser user-agent string into browser, OS and device.
Cat Age to Human Years
Convert a cat’s age into human years.
Anagram Checker
Check whether two words or phrases are anagrams of each other.
URL Parser
Break any URL into protocol, host, path, query parameters and hash.
Remove Empty Lines
Delete all blank/empty lines from a text.
Leap Year Checker
Check whether any year is a leap year.
Ratio Simplifier
Simplify any ratio to its lowest terms.
Remove Extra Spaces
Remove extra spaces from text.
Alphabetical Sorter
Sort any list into alphabetical order.
YAML Viewer
View YAML content converted into a readable JSON tree.
Remove Punctuation
Delete all punctuation marks from a text.
Birthstone Finder
Find your birthstone by birth month.
Child Height Predictor
Predict a child’s adult height from the parents’ heights (mid-parental method).
CSV Validator
Validate CSV — check every row has the same number of columns.
Extract Email Addresses
Extract all email addresses from any text.
Anniversary Countdown
Count down to your next anniversary — live timer.
Contrast Color Finder
Find whether black or white text works best on any background.
Color Blindness Simulator
See how a color looks to people with color blindness.
Remove Hyperlinks
Remove hyperlinks (HTML, Markdown and raw URLs) from a text.
Holiday Countdown
Count down to the next holiday — live timer.
Name Splitter
Split a full name into first, middle and last name.
Time Zone Finder
Search all world time zones and their UTC offsets.
Marathon Time Predictor
Predict your marathon time from a recent race using the Riegel formula.
Emoji Counter
Count how many emojis a text contains.
INI Formatter
Format INI / TOML config files with tidy spacing.
Pangram Checker
Check if a sentence contains every letter of the alphabet.
Age Difference Finder
Find the exact age difference between two people or dates.
File Extension Finder
Find the extension and MIME type of any file name.
File Type Identifier
Identify a file type from its extension, with MIME type.
Remove Cover Page
Remove the first (cover) page of a PDF.
Credit Score Estimator
Estimate your credit score from payment history, utilization and more (rough guide).
Keep Only Numbers
Remove everything except numbers from a text.
Reading Level Checker
Check how easy your text is to read (Flesch Reading Ease score).
Add Prefix to Lines
Add text at the start of every line.
Add Suffix to Lines
Add text at the end of every line.
Remove Prefix from Lines
Remove a prefix from the start of every line.
Remove Suffix from Lines
Remove a suffix from the end of every line.
Duplicate Line Highlighter
Highlight lines that appear more than once.
Consecutive Space Finder
Find double (consecutive) spaces hiding in a text.
TOML Formatter
Format TOML config files with tidy spacing.
CSV Minifier
Minify CSV by trimming every cell and removing blank rows.
RGB Color Validator
Validate an RGB color value by converting a HEX color.
HTTP Request Builder
Build an HTTP request as a cURL command.
Language Name Lookup
Look up language names and their ISO codes.
Currency Symbol Finder
Find the symbol and code of any world currency.
Neck Tie Length Guide
Find the right necktie length for your height.
Isogram Checker
Check if a word is an isogram (no repeating letters).
Name Formatter
Format a name in Title Case, UPPERCASE, Last-First and initials.
Blood Type Compatibility Checker
Check blood donation compatibility — who you can donate to and receive from.
Birth Flower Finder
Find your birth flower by birth month.
Chinese Zodiac Finder
Find your Chinese zodiac animal from your birth year.
Week Number Finder
Find the ISO week number and day of year for any date.
Day Name Finder
Find which day of the week any date falls on, plus its week number.
Timezone List Viewer
View the full list of world time zones with offsets.
Time Zone Reference
A searchable reference of world time zones and UTC offsets.
Emoji Search Tool
Search emojis by keyword and copy with one click.
Emoji Category Browser
Browse emojis and copy any of them with one click.
Emoji Copy Tool
Copy emojis with one click — search or browse.
Emoji Meaning Finder
Find emojis by their meaning keywords and copy them.
Lucky Color Finder
Find your lucky color from your date of birth.
File Extension Extractor
Extract the extension from a file name and see its MIME type.
MIME Type Checker
Check the MIME type of any file extension.
MIME Type Finder
Find the MIME type for any file extension.
MIME Type Reference
Reference: file extensions and their MIME types.
File Name Shortener
Shorten long file names while keeping the extension.
File Name Sanitizer
Sanitize file names — remove bad characters, make them URL-safe.
File Name Cleaner
Clean file names into safe, tidy names.
Duplicate File Name Checker
Find duplicate names in a list of files.
Add Cover Page
Add a title cover page to the start of a PDF.
Insert Blank Pages
Insert a blank page into a PDF (start or end).
Add Blank Last Page
Add a blank page at the end of a PDF.
Remove Blank Pages
Remove pages with no text from a PDF automatically.
Detect Blank Pages
Detect which pages of a PDF are blank (no text).
Extract Hyperlinks
Extract hyperlink URLs from a PDF file.
File Permission Viewer
Explain Unix file permissions (e.g. 755) in plain words.
Shipping Cost Estimator
Estimate shipping cost from weight and distance zone.
Aspect Ratio Simplifier
Simplify an aspect ratio (e.g. 1920×1080 → 16:9).
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