Prime Number Checker

Translate captions into multiple languages for global posting.

Get inline, end-cluster and pick-list emojis matched to your text mood.

Create standard operating procedures with steps and troubleshooting.

Create categorized checklists for any task or project.

Condense long articles, emails, or documents into concise summaries with key points.

Fix grammar, spelling, and punctuation errors while improving clarity and flow.

Generate day-by-day travel itineraries with activities, restaurants, budget and packing tips.

Transform simple prompts into detailed, professional AI image generation prompts with modifiers.

Create strong, random passwords with custom rules.

Count characters, words and reading time instantly.

Generate placeholder text in paragraphs or words.

Convert length, weight, temperature and more.

Convert times across world timezones.

Measure connection speed and estimate image, video, and page load times.

Convert text between UPPERCASE, camelCase, snake_case, kebab-case and more.

Compare two text blocks line by line and highlight additions and deletions.

Convert between HEX, RGB and HSL with a live color picker and HSL sliders.

Focus timer with 25-min work sessions and automatic short and long breaks.

Reverse text by characters, words, or lines instantly.

Sort lines alphabetically, by length, or shuffle them randomly.

Remove duplicate lines from text with case-sensitive matching.

Create clean URL slugs from any title or text.

Repeat text multiple times with custom separators.

Find and replace text with case-sensitive matching and count.

Add sequential line numbers to text in multiple formats.

Trim, collapse spaces, and remove empty lines from text.

Translate text to Morse code and vice versa.

Convert text to binary and binary back to text.

Convert numbers between binary, octal, decimal, and hex.

Calculate percentages, find X% of Y, and percentage change.

Calculate tip, total, and split the bill among people.

Calculate Body Mass Index with category in metric or imperial.

Calculate exact age in years, months, days, weeks, and hours.

Find the duration between two dates in multiple units.

Calculate monthly payments, total interest, and total paid.

Estimate mortgage payments with down payment, rate, and term.

Calculate compound interest with custom compounding frequency.

Calculate sales tax and total cost from pre-tax amount.

Convert numbers to Roman numerals and Roman numerals to numbers.

Convert fractions to decimals, simplify, and see percentages.

Generate random numbers within a range with optional uniqueness.

Roll any number of dice with 4, 6, 8, 10, 12, 20, or 100 sides.

Flip a virtual coin and track heads vs tails statistics.

Generate random colors with HEX, RGB, and HSL values.

Set a countdown with minutes and seconds and get alerted.

Precision stopwatch with lap tracking and millisecond accuracy.

See the current time in major cities around the world.

Find the day number of the year, days remaining, and week.

Find the ISO week number, quarter, and weekday for any date.

Convert CSV data into a formatted JSON array of objects.

Convert a JSON array of objects into CSV format.

Minify JSON by removing whitespace and see bytes saved.

Beautify and indent XML markup for readability.

Count word occurrences and visualize frequency in a bar chart.

Search and reference HTTP status codes with descriptions.

Break down a URL into protocol, host, path, params, and hash.

Parse a user agent string to detect browser, OS, and device.

Calculate running pace, speed, and finish time estimates.

Convert between cups, tablespoons, teaspoons, ml, and grams.

Calculate trip fuel cost based on distance, efficiency, and price.

Convert between bytes, KB, MB, GB, TB, and PB.

Convert between bps, Kbps, Mbps, Gbps, B/s, KB/s, and MB/s.

Auto-saving notepad that persists notes to your browser.

Check password strength with criteria and visual meter.

Split a bill with tip evenly among any number of people.

Check color contrast ratios for WCAG AA and AAA accessibility.

Audit HTML markup for common WCAG accessibility issues like missing alt text, labels, and heading order.