iCalendar (ICS) to JSON Converter The iCalendar (ICS) to JSON Converter parses RFC 5545 calendar content into structured JSON you can read, transform, or feed into another program. Paste an exported .ics file from Google Calendar, Apple Calendar, or Outlook and the tool unfolds long lines, unescapes TEXT values, separates property parameters from values, parses ...
Try the Tool »Password Hash Crack Time Estimator Estimate how long it would take a real-world attacker to brute-force a password protected by a specific hashing algorithm. The estimator pairs Hashcat-grade hash rates with the keyspace of your chosen password composition, then reports a crack time across four attacker tiers: a budget GPU, a single RTX 4090, a ...
Try the Tool »CSR (Certificate Signing Request) Generator Generate a PKCS#10 Certificate Signing Request and matching RSA private key entirely in your browser. Fill in the subject fields, add Subject Alternative Names, pick a key size, and click Generate. Both files are produced locally — the private key is never transmitted to any server, never logged, and never ...
Try the Tool »Concrete Volume & Bags Calculator Calculate the exact volume of concrete you need for slabs, columns, and footings, plus the number of 40, 60, or 80-pound (or 20, 25, 30-kilogram) premix bags required to fill it. Switch between metric and imperial units, add a wastage allowance for spillage and uneven subgrade, and see your pour ...
Try the Tool »RSS / Atom Feed Generator Build a strictly spec-compliant RSS 2.0 or Atom 1.0 XML feed in seconds. Fill in your channel metadata, paste a block of items, and copy or download a feed that passes the W3C Feed Validator on the first try — proper XML escaping, RFC 822 / RFC 3339 dates, CDATA-wrapped ...
Try the Tool »Markdown Link & Image Extractor Pull every link and image out of a Markdown document in seconds. Paste a README, a blog post, or any other Markdown source and the extractor lists each entry with its anchor text, destination URL, optional title, and whether it points internally or externally. Reference-style links are resolved against their ...
Try the Tool »Excel (XLSX) to CSV Converter Convert any Excel workbook into a clean CSV file directly in your browser. Upload an .xlsx or .xls file, pick the worksheet you want, choose the delimiter and line ending, and download the result. Nothing is uploaded to a server — your spreadsheet never leaves your device. How to Use ...
Try the Tool »Prettier Config Generator Build a correct Prettier configuration without hunting through the docs. Pick every formatting option from a checklist, add per-language overrides for Markdown, HTML, YAML and JSON, and export the result as .prettierrc.json, .prettierrc.yaml, an ES module, a CommonJS module, or a ready-to-paste "prettier" key for package.json. A matching .prettierignore template is generated ...
Try the Tool »CSS Loading Animation Generator Generate eight popular loading animations in pure CSS — rotating ring, dual ring, pulse dots, bouncing dots, bouncing ball, equalizer bars, pulse circle, and typing indicator. Tweak color, size, stroke width, and duration; watch the live preview update instantly; copy the @keyframes + minimal HTML into your project. Zero JavaScript, zero ...
Try the Tool »Sleep Cycle & Wake-Up Time Calculator The Sleep Cycle & Wake-Up Time Calculator finds the bedtimes and wake-up times that line up with the natural 90-minute rhythm of your sleep. Waking at the end of a complete cycle — rather than in the middle of deep or REM sleep — leaves you feeling clearer-headed, even ...
Try the Tool »Haskell Code Formatter (Fourmolu / Ormolu Style) Paste raw Haskell source and get back code formatted to a deterministic, Fourmolu / Ormolu-inspired style — with consistent operator spacing, sorted LANGUAGE pragmas, grouped imports, and tabs normalized to spaces. Everything runs locally in your browser, so your source code never leaves your machine. How to Use ...
Try the Tool »Dollar Cost Averaging (DCA) Calculator Dollar Cost Averaging is the practice of investing a fixed amount on a regular schedule regardless of market price. This calculator simulates a DCA plan period-by-period, projects the future portfolio value, and compares it to investing the same total amount as a single lump sum. The result is a clear, ...
Try the Tool »ESLint Config Generator Generate a ready-to-use ESLint configuration for your project in seconds. Pick your framework, language version, environments, and rule severities, then copy the output directly into your repo. Supports both the modern flat config (eslint.config.js, ESLint v9+) and the legacy .eslintrc.json format used by ESLint v8. How to Use Choose your config format: ...
Try the Tool »Churn Rate & Retention Calculator Calculate customer churn rate, MRR churn, Net Revenue Retention (NRR), Gross Revenue Retention (GRR), and annualized churn from a single set of inputs. Designed for SaaS operators, RevOps analysts, and founders who need precise, consistent retention metrics without spreadsheet errors. How to Use Pick the period your numbers cover (monthly, ...
Try the Tool »Ansible Playbook YAML Formatter Paste any Ansible playbook or task file and get back consistently formatted YAML with task keys in the canonical order (name → module → args → loop → when → register → notify). The tool detects whether you pasted a playbook or a task list, validates the structure, and surfaces ansible-lint ...
Try the Tool »GitHub Actions YAML Linter & Formatter Paste a GitHub Actions workflow file and instantly catch broken structure, deprecated syntax, and risky patterns before they fail a CI run. The linter validates your workflow against a built-in schema for triggers, jobs, steps, runners, permissions, and reusable workflow calls, then reformats the YAML with a workflow-aware key ...
Try the Tool »SVG Loading Spinner Generator Build crisp, animated SVG loading spinners directly in the browser and copy ready-to-use markup for your project. Pick from seven popular spinner styles, fine-tune size, stroke, colors, and animation speed, then watch the live preview update instantly. Export as a self-contained inline SVG, a plain HTML + CSS snippet, or a ...
Try the Tool »HAR to Postman Collection Converter Browser DevTools, Charles Proxy and mitmproxy all let you save captured traffic as a HAR (HTTP Archive) file, but Postman cannot import HAR directly. This converter rewrites a HAR export into a Postman Collection v2.1 JSON file in your browser, so you can replay every captured request as a real ...
Try the Tool »Confidence Interval Calculator The Confidence Interval Calculator turns a single sample into a defensible range estimate for an unknown population parameter. Feed it your sample size, sample mean and sample standard deviation (or, for survey-style data, your sample size and number of “yes” responses) and it returns the lower bound, upper bound, margin of error ...
Try the Tool »HAR File Performance Analyzer Upload or paste an HTTP Archive (HAR) file and instantly get a performance breakdown of every request the browser made: total transfer size, request count, slowest endpoints, biggest payloads, status code distribution and per-domain timing. Everything is parsed client-side in your browser — your HAR file never leaves the page. How ...
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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 Jun 16, 2026
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