All tools
Browse calculators, converters, image tools, text utilities and developer helpers.
Showing 164 of 164 tools
Area Calculator
Calculate the area of circles, rectangles, squares, triangles and more.
Use tool βPercentage Calculator
Work out percentages quickly and easily.
Use tool βYouTube Thumbnail Downloader
Preview available thumbnail sizes from a YouTube video link.
Use tool βImage Resizer & Compressor
Resize an image in your browser and download the result.
Use tool βCompound Interest Calculator
See how your money can grow over time with regular contributions.
Use tool βLoan Calculator
Calculate monthly payments and total interest.
Use tool βDiscount Calculator
Find final prices and savings in seconds.
Use tool βBMI Calculator
Check your Body Mass Index and healthy weight range.
Use tool βCalorie Calculator
Estimate your daily calorie needs from age, body and activity.
Use tool βWord Counter
Count words, characters, sentences and reading time.
Use tool βLorem Ipsum Generator
Generate placeholder text for designs and prototypes.
Use tool βJSON Formatter & Validator
Format, validate and minify JSON β right in your browser.
Use tool βMathKit Scientific Calculator
Scientific calculator plus powers, roots, GCD/LCM, primes and statistics.
Use tool βNegative Marks Calculator
Calculate exam score with 1/4, 1/3, 1/2 or custom negative marking.
Use tool βAge Calculator
Find your age in years, months and days.
Use tool βDate Difference Calculator
Count days between two dates.
Use tool βDays Until Calculator
See how many days remain until a special date.
Use tool βTime Duration Calculator
Calculate elapsed time between two clock times.
Use tool βTip Calculator
Split a bill and calculate a tip per person.
Use tool βSalary to Hourly Calculator
Convert an annual salary into an estimated hourly rate.
Use tool βHourly to Salary Calculator
Estimate annual pay from your hourly wage.
Use tool βSales Tax Calculator
Calculate tax and the total price.
Use tool βPaycheck Calculator
Estimate take-home pay after a simple tax percentage.
Use tool βSavings Goal Calculator
Estimate how long it may take to reach a savings target.
Use tool βProfit Margin Calculator
Calculate gross profit and margin from cost and price.
Use tool βMarkup Calculator
Calculate a selling price from cost and markup.
Use tool βBreak-Even Calculator
Estimate units needed to cover fixed costs.
Use tool βSales Commission Calculator
Calculate commission earned on a sale.
Use tool βRent Affordability Calculator
Estimate a monthly rent budget from your income.
Use tool βLoan to Value Calculator
Estimate a loan-to-value ratio.
Use tool βBody Fat Calculator
Get a rough body-fat estimate from measurements.
Use tool βIdeal Weight Calculator
View a general healthy-weight range by height.
Use tool βWater Intake Calculator
Get a general daily water-intake estimate.
Use tool βRunning Pace Calculator
Calculate pace from distance and finish time.
Use tool βOne Rep Max Calculator
Estimate a one-repetition maximum from a lifted set.
Use tool βUnit Converter
Convert between common metric and imperial units.
Use tool βTemperature Converter
Convert Celsius, Fahrenheit and Kelvin.
Use tool βLength Converter
Convert between common units of length.
Use tool βWeight Converter
Convert between common units of weight.
Use tool βData Storage Converter
Convert bytes, kilobytes, megabytes and gigabytes.
Use tool βSpeed Converter
Convert between km/h, mph and m/s.
Use tool βRoman Numeral Converter
Convert numbers and Roman numerals.
Use tool βBinary & Decimal Converter
Convert numbers between binary and decimal.
Use tool βBase64 Encoder & Decoder
Encode or decode text as Base64 in your browser.
Use tool βURL Encoder & Decoder
Encode or decode URL components.
Use tool βHTML Entity Encoder
Escape or decode HTML special characters.
Use tool βCase Converter
Switch text between common letter cases.
Use tool βCharacter Counter
Count characters with and without spaces.
Use tool βReading Time Calculator
Estimate how long it takes to read your text.
Use tool βText Reverser
Reverse text, words or lines.
Use tool βDuplicate Line Remover
Remove repeated lines from pasted text.
Use tool βText Line Sorter
Sort lines alphabetically or numerically.
Use tool βURL Slug Generator
Turn a title into a clean URL slug.
Use tool βPassword Generator
Create a random password locally in your browser.
Use tool βUUID Generator
Generate a random UUID v4 locally.
Use tool βColor Converter
Convert HEX, RGB and HSL color values.
Use tool βCSS Gradient Generator
Create a CSS linear-gradient declaration.
Use tool βRegex Tester
Test a regular expression against sample text.
Use tool βMarkdown Preview
Preview simple Markdown formatting.
Use tool βMeta Tag Generator
Generate copy-ready title and description meta tags.
Use tool βKeyword Density Checker
Review keyword frequency in a block of text.
Use tool βImage Aspect Ratio Calculator
Calculate image proportions and a matching dimension.
Use tool βPixel to REM Converter
Convert pixels to REM using your root font size.
Use tool βPercentage Change Calculator
Find the percentage increase or decrease between values.
Use tool βAI Prompt Builder
Build a clear, reusable prompt for an AI assistant.
Use tool βAI Image Prompt Builder
Compose a detailed prompt for AI image generators.
Use tool βAI Video Prompt Builder
Create a shot-by-shot prompt for AI video tools.
Use tool βAI Email Writing Prompt
Draft a reusable prompt for a polished email.
Use tool βAI Blog Outline Prompt
Generate a structured outline prompt for an article.
Use tool βAI Social Post Prompt
Build prompts for platform-ready social content.
Use tool βAI Coding Prompt Builder
Describe a programming task clearly to an AI coding assistant.
Use tool βAI Research Prompt Builder
Create a research prompt with scope and source requirements.
Use tool βAI Study Plan Prompt
Prepare a personalized study-plan prompt.
Use tool βAI Lesson Plan Prompt
Create a classroom lesson-planning prompt.
Use tool βAI Product Copy Prompt
Build a prompt for clear and persuasive product copy.
Use tool βAI Ad Copy Prompt
Prepare a focused prompt for ad variations.
Use tool βAI Resume Bullet Prompt
Turn experience details into a results-focused AI prompt.
Use tool βAI Interview Practice Prompt
Create a role-specific interview practice prompt.
Use tool βAI Brainstorming Prompt
Set constraints and generate a useful brainstorming prompt.
Use tool βAI Translation Prompt
Specify audience, tone and context for AI translation.
Use tool βAI Summary Prompt
Create a prompt for concise, structured summaries.
Use tool βAI Art Style Prompt Builder
Combine subject, style, lighting and composition details.
Use tool βAI Negative Prompt Builder
Build a reusable negative prompt from common exclusions.
Use tool βAI Prompt Refiner
Add context, output format and constraints to a rough idea.
Use tool βInstagram Caption Formatter
Format a caption with line breaks and a call to action.
Use tool βTikTok Caption Helper
Prepare a short caption and relevant hashtags.
Use tool βYouTube Title Workshop
Create title variations from a video topic.
Use tool βYouTube Description Builder
Format a video description with links and chapters.
Use tool βYouTube Chapter Formatter
Turn timestamps and labels into chapter links.
Use tool βHashtag Formatter
Clean and format a list of social hashtags.
Use tool βSocial Bio Builder
Arrange your role, value and link into a concise bio.
Use tool βSocial Post Character Counter
Count characters and estimate platform fit.
Use tool βCall to Action Builder
Write a clear CTA from an action and audience.
Use tool βProduct Name Workshop
Generate name directions from keywords.
Use tool βSlogan Workshop
Create slogan options from a product and benefit.
Use tool βEmail Subject Line Helper
Draft subject line variations from a campaign topic.
Use tool βUTM Link Builder
Add campaign tracking parameters to a URL.
Use tool βYouTube Tags Formatter
Clean, deduplicate and format video tags.
Use tool βVideo Script Outline
Create a simple hook, sections and call-to-action outline.
Use tool βPodcast Show Notes Formatter
Format episode details, links and timestamps.
Use tool βContent Calendar Starter
Create a dated sequence of content planning prompts.
Use tool βAffiliate Disclosure Writer
Create a plain-language affiliate disclosure draft.
Use tool βCreator Engagement Calculator
Estimate engagement and a simple rate benchmark.
Use tool βEngagement Rate Calculator
Calculate interactions as a share of audience reach.
Use tool βKeyword List Cleaner
Trim, lowercase, sort and deduplicate keyword lists.
Use tool βRobots Meta Tag Builder
Create common robots meta directives.
Use tool βCanonical URL Tag Builder
Format a canonical link element for a page URL.
Use tool βOpen Graph Tag Builder
Create social-sharing Open Graph metadata.
Use tool βFAQ Schema JSON-LD Builder
Format FAQ pairs as a JSON-LD schema snippet.
Use tool βProduct Schema JSON-LD Builder
Create a basic Product structured-data snippet.
Use tool βImage Alt Text Helper
Draft concise descriptive alt text from image context.
Use tool βHreflang Tag Builder
Format language and region alternate links.
Use tool βSitemap URL List Formatter
Turn a URL list into sitemap XML entries.
Use tool βWord Frequency Counter
Rank the most common words in a text sample.
Use tool βReadability Estimator
Estimate sentence length and reading difficulty.
Use tool βFlesch Reading Ease Calculator
Estimate reading ease using sentence and syllable counts.
Use tool βHeadline Length Checker
Check headline length and basic word balance.
Use tool βHTML Minifier
Remove comments and excess whitespace from HTML.
Use tool βCSS Minifier
Minify CSS by removing comments and whitespace.
Use tool βJavaScript Source Inspector
Inspect JavaScript source size and line count without altering code.
Use tool βSQL Formatter
Format common SQL clauses onto readable lines.
Use tool βJSON to CSV Converter
Convert an array of JSON objects into CSV.
Use tool βCSV to JSON Converter
Convert CSV rows into JSON objects.
Use tool βCSV Delimiter Converter
Change a CSV delimiter while respecting quoted values.
Use tool βXML Entity Encoder
Escape special characters for XML text.
Use tool βJWT Decoder
Decode a JWT header and payload locally (no signature verification).
Use tool βUnix Timestamp Converter
Convert Unix seconds or milliseconds to a readable date.
Use tool βDate to Unix Timestamp
Convert a date and time into Unix seconds and milliseconds.
Use tool βCron Expression Helper
Explain common five-field cron schedule values.
Use tool βHTTP Status Code Lookup
Look up a common HTTP response status code.
Use tool βColor Contrast Checker
Check contrast ratio between two HEX colors.
Use tool βCSS Box Shadow Generator
Build a CSS box-shadow declaration from visual values.
Use tool βCSS Border Radius Builder
Create a CSS border-radius declaration.
Use tool βCSS Flexbox Snippet Builder
Create a flexbox layout snippet from common settings.
Use tool βCSS Grid Snippet Builder
Create a responsive CSS grid snippet.
Use tool βVideo Aspect Ratio Calculator
Calculate a video frame aspect ratio.
Use tool βCSS Clamp Generator
Generate a fluid CSS clamp value between screen sizes.
Use tool βPixels to Viewport Width
Convert a pixel value to viewport width units.
Use tool βPixels to Points Converter
Convert CSS pixels to typographic points.
Use tool βText Data URI Generator
Encode text into a data URI.
Use tool βMarkdown Table Builder
Build a Markdown table from pasted CSV-style rows.
Use tool βText Difference Checker
Compare two text blocks and show changed lines.
Use tool βFraction to Percent Converter
Convert a numerator and denominator to percent.
Use tool βFraction Calculator
Add, subtract, multiply or divide two fractions.
Use tool βGPA Calculator
Estimate a weighted grade-point average.
Use tool βFinal Grade Calculator
Calculate a weighted course grade from scores.
Use tool βMortgage Payment Calculator
Estimate monthly principal and interest payments.
Use tool βLoan Payoff Calculator
Estimate payoff time with a fixed monthly payment.
Use tool βRent vs Buy Snapshot
Compare a simple monthly rent and ownership estimate.
Use tool βInflation Value Calculator
Estimate a future value using an assumed annual inflation rate.
Use tool βInvestment Return Calculator
Calculate total and annualized investment return.
Use tool βEmergency Fund Calculator
Estimate an emergency savings target from monthly expenses.
Use tool βRetirement Savings Projector
Project savings with a monthly contribution and assumed return.
Use tool βMacro Nutrient Calculator
Estimate protein, carbohydrate and fat grams from calories.
Use tool βSleep Cycle Planner
Suggest wake-up times based on approximate sleep cycles.
Use tool βFuel Cost Calculator
Estimate trip fuel cost from distance and efficiency.
Use tool βElectricity Cost Calculator
Estimate electricity use cost from watts and hours.
Use tool βDownload Time Calculator
Estimate download time from file size and connection speed.
Use tool βScreen PPI Calculator
Estimate screen pixel density from resolution and size.
Use tool βPercent to Fraction Converter
Convert a percentage to a simplified fraction.
Use tool βAI Meeting Notes Prompt
Prepare a prompt to summarize meeting notes and action items.
Use tool βSubtitle SRT Formatter
Format subtitle text as a basic SRT sequence.
Use tool βJSON Schema Shape Checker
Check JSON data against a basic object schema.
Use tool βText to Speech Reader
Read text aloud using your browser speech voices.
Use tool β