THE YORPHIVES COLLECTION
Free tools directory
Practical tools for writing, development, design, and everyday work. Each runs in your browser.
Calculators
Percentage CalculatorCalculate a percentage of a value, a percentage share, or percentage change.Discount CalculatorCalculate a sale price and savings from an original price and discount.Profit Margin CalculatorCalculate profit, margin, and markup from cost and selling price.Tip & Bill Split CalculatorCalculate a tip and split a bill among a group.Sales Tax CalculatorCalculate tax and the total from an amount and a rate you provide.Unit ConverterConvert common length, weight, and temperature units.Time Duration CalculatorFind the time between two clock times, including an overnight end.Average & Median CalculatorCalculate the mean, median, sum, and range of a list of numbers.Business Days CalculatorCount weekdays between two dates, with an optional list of holidays.Add or Subtract DaysAdd or subtract calendar days from a date.Compound Interest CalculatorEstimate the growth of savings with monthly compounding and contributions.Loan Payment CalculatorEstimate a fixed-rate monthly loan payment and total interest.Return on Investment CalculatorCalculate net gain and return on investment from a cost and total return value.Break-even CalculatorEstimate the number of units needed to cover fixed costs.Reverse Sales Tax CalculatorFind the pre-tax amount and tax included in a total price.Currency Converter with Manual RateConvert a currency amount using an exchange rate you provide.
Creator
Design
Hex Color ConverterConvert a hex color into RGB and HSL values.Color Contrast CheckerCheck text and background colors against WCAG contrast thresholds.CSS Gradient GeneratorCreate a two-color CSS linear gradient and preview the result.Aspect Ratio CalculatorSimplify image dimensions and calculate a proportional height.Color Palette GeneratorGenerate five evenly spaced colors from a hex color.CSS Box Shadow GeneratorCreate CSS box-shadow code and preview the effect.PX to REM ConverterConvert CSS pixel and rem values using your chosen root font size.CSS Grid GeneratorGenerate a responsive-friendly CSS grid declaration with equal columns.
Developer
Base64 Encoder & DecoderEncode and decode UTF-8 text using Base64.URL Encoder & DecoderEncode or decode a URL component using percent encoding.HTML Entity Encoder & DecoderEncode special HTML characters or decode common entities and numeric references.JSON to CSV ConverterConvert an array of JSON objects into CSV for spreadsheets and data tools.CSV to JSON ConverterConvert CSV with a header row into an array of JSON objects.URL ParserInspect a URL’s host, path, query parameters, and fragment.UUID GeneratorGenerate version 4 UUIDs using your browser’s secure random generator.SHA Hash GeneratorCreate a SHA-256, SHA-384, or SHA-512 hash of UTF-8 text.JWT DecoderRead the header and payload of a JSON Web Token locally.Unix Timestamp ConverterConvert Unix timestamps to UTC dates or timezone-qualified ISO dates to timestamps.JSON Formatter & ValidatorFormat, minify, and validate JSON while preserving the original numbers.Markdown to HTML ConverterConvert Markdown into HTML locally using the open-source Marked parser.Regular Expression TesterFind regular-expression matches and capture groups in text, privately in your browser.JSON Pointer ExplorerSelect a value from a JSON document using an RFC 6901 JSON Pointer.JSON Merge PatchApply an RFC 7396 merge patch to a JSON document without sending your data away.JSON Lines ConverterConvert JSON Lines to a JSON array or a JSON array to JSON Lines.Number Base ConverterConvert whole numbers between binary, octal, decimal, and hexadecimal with arbitrary precision.Text to Hex ConverterEncode text as UTF-8 hexadecimal bytes or decode valid UTF-8 hex back to text.IPv4 Subnet CalculatorCalculate an IPv4 network, subnet mask, address range, and usable hosts from a CIDR prefix.Unicode Code Point InspectorInspect the Unicode code point for each character in a string.CSV to Markdown TableTurn CSV data into a Markdown table while preserving quoted commas and line breaks.URL Query Parameter BuilderAdd or replace URL query parameters safely without manually encoding them.JSON Key SorterSort nested JSON object keys while preserving array order.CSV Column ExtractorSelect a CSV column by header, preserving quoted fields and newlines.CSV to HTML TableGenerate properly escaped HTML table markup from a CSV.
Files
File SHA-256 ChecksumCalculate the SHA-256 checksum of a file locally.File Format InspectorIdentify common file types from actual file signatures instead of filenames.Batch File RenamerGive multiple files consistent numbered names and download one ZIP.ZIP File CreatorCreate a downloadable ZIP of local files with no uploads.ZIP Contents ViewerView ZIP filenames and uncompressed sizes without extracting anything.Open-Source Conversion Command BuilderMake copyable commands for free desktop conversion tools.
Images
Images to PDFCombine JPEG, PNG, or WebP images into a PDF, one image per page.Image CropperCrop a JPEG, PNG, or WebP image using pixel coordinates.Rotate and Flip ImageRotate an image by 90-degree increments or flip it horizontally.Add Text WatermarkAdd a text watermark to an image without uploading it.
Marketing
Campaign URL BuilderCreate clean UTM tracking links for campaigns, newsletters, and social posts.URL Tracking Parameter RemoverRemove common tracking parameters from a link without visiting the destination.Email Link GeneratorCreate a mailto link with an optional subject and message.SEO and Open Graph Meta Tag GeneratorCreate basic page title, description, canonical, and Open Graph tags.Robots.txt GeneratorBuild a basic robots.txt file with optional disallowed paths and sitemap.XML Sitemap GeneratorCreate an XML sitemap from a list of page URLs on one website.
Merge PDF FilesCombine PDF documents into one file directly in your browser.Extract PDF PagesCreate a new PDF from the pages or ranges you choose.Remove PDF PagesRemove selected pages and download the remaining PDF.Rotate PDF PagesRotate all or selected PDF pages by a right angle.PDF Page CounterCount PDF pages and inspect their dimensions locally.
Presentations
Security
Spreadsheets
Writing
Word & Character CounterCount words, characters, sentences, paragraphs, and estimated reading time.Text Case ConverterConvert text to uppercase, lowercase, title case, or sentence case.URL Slug GeneratorTurn a title into a clean, readable URL slug.Duplicate Line RemoverRemove repeated lines while keeping their original order.Line SorterSort lines alphabetically or in natural numeric order.Whitespace CleanerClean spaces and blank lines with simple, configurable options.Text Find & ReplaceFind and replace an exact piece of text without uploading it.Text Difference CheckerCompare two versions of text line by line.Word Frequency CounterFind the most frequently used words in a piece of text.Lorem Ipsum GeneratorGenerate placeholder paragraphs for mockups, prototypes, and layouts.Reverse TextReverse text while preserving emoji and combined characters where supported.List and Delimiter ConverterJoin lines with a separator or split separated text into a list.