A useful little grid
Free tools that do the work.
Calculators, converters, and text helpers that run in your browser. No account, no uploads, no friction.
Calculators
Age Calculator
Calculate an exact age between two dates.
Open toolPercentage Calculator
Find any percentage of a number.
Open toolEMI Calculator
Estimate a fixed monthly loan payment.
Open toolGST Calculator
Add GST to an amount in Indian rupees.
Open toolBMI Calculator
Estimate body mass index from height and weight.
Open toolSalary to Hourly Calculator
Convert annual salary into an hourly rate.
Open toolCompound Interest Calculator
Project savings growth with regular contributions.
Open toolSimple Interest Calculator
Calculate simple interest and total repayment.
Open toolLoan Calculator
Estimate monthly payments for a fixed-rate loan.
Open toolTip Calculator
Calculate a tip and total bill amount.
Open toolSplit Bill Calculator
Split a bill fairly between people.
Open toolPercentage Increase Calculator
Find the percentage change between two values.
Open toolBMR Calculator
Estimate basal metabolic rate from personal measurements.
Open toolCalorie Calculator
Estimate daily maintenance calories.
Open toolConverters
Celsius to Fahrenheit Converter
Convert Celsius temperatures to Fahrenheit.
Open toolKG to LBS Converter
Convert kilograms to pounds.
Open toolJSON to YAML Converter
Transform valid JSON into readable YAML.
Open toolCurrency Converter
Convert common currencies using reference exchange rates.
Open toolTime Zone Converter
Convert a date and time between global time zones.
Open toolUnix Timestamp Converter
Convert Unix timestamps into readable dates.
Open toolDate Difference Calculator
Find the number of days between two dates.
Open toolMinutes to Hours Converter
Convert minutes into hours and minutes.
Open toolBytes Converter
Convert bytes into kilobytes, megabytes, and gigabytes.
Open toolSpeed Converter
Convert kilometres per hour to miles per hour.
Open toolArea Converter
Convert square metres to square feet.
Open toolDeveloper tools
JSON Formatter
Format and indent valid JSON.
Open toolJSON Validator
Validate JSON and show parsing errors.
Open toolBase64 Encoder Decoder
Encode or decode Base64 text locally.
Open toolURL Encoder Decoder
Encode or decode URL text safely.
Open toolUUID Generator
Generate UUID v4 identifiers in your browser.
Open toolSHA-256 Generator
Create a SHA-256 hash from text locally.
Open toolJWT Decoder
Decode the readable header and payload of a JWT.
Open toolRegex Tester
Test a regular expression against text.
Open toolHTML Entity Encoder
Encode or decode common HTML entities.
Open toolUUID Bulk Generator
Generate multiple UUID v4 values at once.
Open toolCron Generator
Generate a basic cron expression from common schedules.
Open toolMarketing tools
UTM Builder
Build campaign tracking links with UTM parameters.
Open toolMeta Tag Generator
Generate title and description meta tags.
Open toolOpen Graph Generator
Generate Open Graph social sharing tags.
Open toolRobots.txt Generator
Create a basic robots.txt file.
Open toolSitemap Generator
Generate sitemap XML from a list of URLs.
Open toolKeyword Density Checker
Identify frequently used words in a text.
Open toolText tools
Word Counter
Count words in text as you type.
Open toolCase Converter
Change text into common letter cases.
Open toolCharacter Counter
Count characters, words, and lines in text.
Open toolRemove Line Breaks
Replace line breaks with spaces.
Open toolRemove Duplicate Lines
Keep only the first occurrence of each line.
Open toolReverse Text
Reverse text while preserving Unicode characters.
Open toolSlug Generator
Create URL-friendly slugs from text.
Open toolSort Lines
Sort lines of text alphabetically.
Open toolText Diff Checker
Compare two pieces of text for equality.
Open toolStudent tools
GPA Calculator
Calculate grade point average from grade points.
Open toolGrade Calculator
Calculate a percentage grade from earned and possible points.
Open toolStudy Time Calculator
Plan daily study time across available days.
Open toolCitation Generator
Create a simple APA-style website citation.
Open toolProfessional tools
Hourly Rate Calculator
Calculate an hourly rate from weekly pay and hours.
Open toolOvertime Calculator
Estimate overtime pay from rate and hours.
Open toolMeeting Cost Calculator
Estimate the payroll cost of a meeting.
Open toolWorkdays Calculator
Convert calendar days into estimated workdays.
Open toolPTO Calculator
Calculate paid time off earned over a period.
Open toolBusiness tools
Profit Margin Calculator
Calculate profit and margin from revenue and cost.
Open toolMarkup Calculator
Calculate selling price from cost and markup.
Open toolBreak-Even Calculator
Estimate units needed to cover fixed costs.
Open toolROI Calculator
Calculate return on investment as a percentage.
Open toolSales Tax Calculator
Add sales tax to a pre-tax amount.
Open toolInvoice Generator
Generate a simple invoice total from quantity and price.
Open toolResearch tools
Mean Median Mode Calculator
Calculate descriptive statistics for a number set.
Open toolStandard Deviation Calculator
Calculate population standard deviation.
Open toolSample Size Calculator
Estimate survey sample size for a population.
Open toolScientific Notation Converter
Convert a number into scientific notation.
Open toolResearch Keyword Extractor
Extract frequently used keywords from research text.
Open toolWriting tools
Reading Time Calculator
Estimate how long a text takes to read.
Open toolSentence Counter
Count sentences in a passage.
Open toolParagraph Counter
Count paragraphs in text.
Open toolWriting Prompt Generator
Generate a focused creative writing prompt.
Open toolOutline Generator
Generate a practical outline from a topic.
Open toolCreator tools
Aspect Ratio Calculator
Calculate proportional image or video dimensions.
Open toolImage Dimensions Calculator
Calculate image dimensions from aspect ratio and width.
Open toolHashtag Generator
Generate clean hashtags from a topic.
Open toolVideo Bitrate Calculator
Estimate video bitrate from file size and duration.
Open toolSocial Media Character Counter
Count characters for common social post limits.
Open toolMedia tools
Image Converter
Convert PNG, JPG, and WebP images in your browser.
Open toolImage Compressor
Compress an image by exporting a smaller JPEG locally.
Open toolAudio to WAV Converter
Convert browser-supported audio to uncompressed WAV.
Open toolVideo to WebM Converter
Convert browser-playable video to WebM on supported devices.
Open toolImage Resizer
Resize an image to a target width in your browser.
Open toolImage Rotator
Rotate an image by 90, 180, or 270 degrees.
Open toolImage Metadata Remover
Re-export an image without source metadata.
Open toolImage to PDF
Create a PDF document from selected images.
Open toolFavicon Generator
Generate a square PNG favicon from an image.
Open toolColor Palette Extractor
Extract representative colors from an image.
Open toolImage Watermark
Add a text watermark to an image locally.
Open toolVideo Thumbnail Extractor
Extract a PNG thumbnail from a browser-playable video.
Open toolVideo Trimmer
Trim a video locally with lazy-loaded FFmpeg WebAssembly.
Open toolVideo Mute Tool
Remove a video's audio track locally with FFmpeg WebAssembly.
Open toolVideo to GIF Converter
Convert a short video segment to an animated GIF locally.
Open toolAudio Trimmer
Trim audio locally with FFmpeg WebAssembly.
Open toolAudio Metadata Viewer
View local audio file name, type, size, and duration.
Open toolAudio Volume Normalizer
Normalize audio volume locally with FFmpeg WebAssembly.
Open toolPDF tools
PDF to Image
Render the first PDF page as a PNG image.
Open toolPDF Merger
Merge multiple PDF files into one document.
Open toolPDF Splitter
Split a PDF into individual page files in a ZIP.
Open toolPDF Page Rotator
Rotate every PDF page by a selected angle.
Open toolPDF Page Reorder
Reorder PDF pages using a page-number list.
Open toolPDF Page Numbering
Add visible page numbers to a PDF.
Open toolPDF Form Filler
Fill all text fields in a PDF form with one value.
Open toolEditor tools
SVG Optimizer
Remove comments and unnecessary whitespace from SVG markup.
Open toolMarkdown Editor
Write Markdown and preview simple formatted HTML.
Open toolCode Formatter
Format JSON or tidy HTML-like markup locally.
Open toolXML Formatter
Format XML with readable indentation.
Open toolCSV Editor
Edit CSV text and download the revised file.
Open toolJSON Diff Viewer
Compare two JSON values and show structural differences.
Open toolFile tools
ZIP Creator
Bundle selected files into a ZIP archive locally.
Open toolZIP Extractor
Inspect and extract entries from a local ZIP archive.
Open toolFile Metadata Viewer
View local file name, type, size, and modified date.
Open toolQR Code Scanner
Scan a QR code from an image in a supported browser.
Open toolGames
Sudoku
Play a compact number puzzle with instant validation.
Open toolTic Tac Toe
Play a two-player game of Xs and Os.
Open tool2048
Slide number tiles together to reach 2048.
Open toolMemory Match
Find matching pairs in a quick memory game.
Open toolHangman
Guess the hidden word before your attempts run out.
Open toolWord Scramble
Unscramble a short word puzzle.
Open toolRock Paper Scissors
Play a quick round against the computer.
Open toolMinesweeper
Clear a small minefield without hitting a mine.
Open toolConnect Four
Drop discs and connect four in a row.
Open toolNumber Guessing Game
Guess the number from 1 to 100.
Open tool