.gitignore Generator Generate comprehensive .gitignore files by selecting from 30+ curated presets covering popular languages, frameworks, IDEs, operating systems, and DevOps tools. Merge multiple templates into a single, deduplicated file ready for your project. How to Use 1. Browse or search the preset grid to find your languages, frameworks, and tools.2. Click presets to select ...
Try the Tool »Color Blindness Simulator & Checker See how your images and color palettes look to people with color vision deficiency. Simulate 8 types of CVD and test your designs for WCAG contrast compliance to ensure accessibility for all users. How to Use Upload an image or enter color values to simulate. Select a color vision deficiency ...
Try the Tool »Modulo Calculator Calculate the remainder of a division operation instantly. The Modulo Calculator supports six operations — simple mod, modular addition, subtraction, multiplication, exponentiation, and congruence checking — with full BigInt support for arbitrarily large numbers and both truncated and Euclidean negative number handling. How to Use Select an operation from the dropdown, enter your ...
Try the Tool »CSS Grid Generator Build CSS Grid layouts visually. Click cells to define named areas, adjust column and row sizes, and get production-ready CSS code instantly. No memorizing grid syntax — just click and build. How to Use Set the number of columns and rows, then click on grid cells to assign named areas (like header, ...
Try the Tool »JSON to TypeScript Interface Generator Instantly convert any JSON object or array into clean, ready-to-use TypeScript interfaces. Paste your JSON, configure your preferred export style, and get properly typed definitions with nested interfaces, optional fields, and union types — all generated client-side in real time. How to Use Paste your JSON data into the input ...
Try the Tool »cURL Command Builder Build complete, ready-to-run cURL commands using a visual form instead of remembering flag syntax. Select your HTTP method, add headers, configure authentication, set a request body, and get a properly formatted curl command that you can copy and paste directly into your terminal. How to Use Enter your target URL and select ...
Try the Tool »JSONPath Expression Tester Test and debug JSONPath expressions against your JSON data in real-time. Paste your JSON, write an expression, and instantly see matched results with syntax highlighting and a navigable tree view. How to Use Paste your JSON data in the input panel and type a JSONPath expression. Results update in real-time as you ...
Try the Tool »Pixel / REM / EM Converter Instantly convert between CSS units: pixels (px), root em (rem), and em. Adjust the base font size and watch all values update in real time. Perfect for front-end developers translating design specs into CSS. How to Use Enter a value in any of the three unit fields — px, ...
Try the Tool »Luhn Algorithm Validator Validate any number against the Luhn checksum algorithm instantly. Used worldwide to verify credit card numbers, IMEI codes, and other identifiers, this tool gives you guaranteed-correct results with a full step-by-step breakdown. How to Use Enter or paste a number into the input field. The tool validates it in real time as ...
Try the Tool »OpenAPI / Swagger Spec Validator Validate your OpenAPI 3.0, 3.1, or Swagger 2.0 specifications instantly. Paste YAML or JSON, get a structured list of errors and warnings with JSON Pointer paths, and pretty-print your spec for clean documentation. How to Use Paste your OpenAPI or Swagger spec into the input field. The validator automatically detects ...
Try the Tool »Base58 Encoder / Decoder Encode and decode Base58 strings used in Bitcoin addresses, IPFS CIDs, and other blockchain systems. Supports multiple alphabet variants and Base58Check with SHA-256d checksum verification. How to Use Switch between Encode and Decode modes. For encoding, enter text (UTF-8) or hex data and select your Base58 variant. For decoding, paste a ...
Try the Tool »WHOIS Domain Lookup Look up domain registration details using the modern RDAP protocol. Enter any domain to see its registrar, registration and expiry dates, name servers, DNSSEC status, and domain status codes with human-readable explanations. How to Use Type a domain name (e.g., example.com) and click Lookup. The tool queries the RDAP registry to fetch ...
Try the Tool »Table to Markdown Converter Convert HTML tables, CSV data, or TSV files into properly formatted Markdown tables with aligned columns. Paste your data, adjust column alignment, and get clean Markdown output instantly. How to Use Select your input format (HTML, CSV, or TSV) and paste your table data. The tool parses the input and generates ...
Try the Tool »Data Transfer Time Calculator Instantly calculate how long it will take to transfer a file over any network connection. Enter your file size and bandwidth, adjust for protocol overhead and real-world network efficiency, and get the precise transfer time in days, hours, minutes, or seconds. How to Use Enter your file size (B, KB, MB, ...
Try the Tool »Password Strength Analyzer & Checker Analyze any password in real time to see its strength score, entropy, estimated crack times, and potential vulnerabilities. The analyzer detects common patterns, keyboard walks, dictionary words, and l33t speak substitutions — all without your password ever leaving your browser. How to Use Type or paste a password into the ...
Try the Tool »CSS Clip-Path Generator Visually create CSS clip-path shapes with an intuitive drag-and-drop editor. Build polygons, circles, ellipses, and inset shapes, then copy the generated CSS directly into your stylesheets. How to Use Select a shape type or start from a preset template. Drag control points to adjust the shape visually on the preview canvas. The ...
Try the Tool »ENV File Parser & Formatter Paste your .env file contents and instantly parse, validate, and reformat environment variables. The parser highlights issues like duplicate keys, empty values, and invalid lines — all without your data ever leaving the browser. How to Use Paste your raw .env file content into the input field. The tool automatically ...
Try the Tool »Color Palette Extractor Upload any image and instantly extract its dominant color palette. Uses median cut quantization to identify the most prominent colors, giving you accurate HEX, RGB, and HSL values with usage percentages. How to Use Upload an image by dragging and dropping or clicking the upload area. The tool automatically analyzes the image ...
Try the Tool »Favicon Generator Generate all the favicon sizes your website needs from a single image. Upload once, download every size — from tiny 16×16 browser tabs to 512×512 PWA splash screens. How to Use Upload a source image (PNG, JPG, or SVG recommended). The tool instantly generates all standard favicon sizes. Optionally enable round corners, add ...
Try the Tool »Bitwise Shift Calculator Perform left shift, arithmetic right shift, and logical right shift operations on integers with instant binary visualization. Enter a number in decimal, binary, hex, or octal, choose your shift amount, and see exactly how every bit moves — including carry and overflow. How to Use Enter your number in any supported format ...
Try the Tool »Add IO tools to your favorite browser for instant access and faster searching
Scoreboard is a fun way to keep track of your games, all data is stored in your browser. More features are coming soon!
Update: Our latest tool was added on May 11, 2026
Help us continue providing valuable free tools
