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 ...
Try the Tool »Markdown to Slack mrkdwn Converter Paste standard Markdown and instantly get Slack-ready mrkdwn — the messaging app’s quirky variant where bold is a single asterisk, italics use underscores, and links are wrapped in angle brackets. The converter applies deterministic rewrite rules so headings collapse to bold, bullets switch to round dots, and code blocks stay ...
Try the Tool »Coordinate Format Converter Convert geographic coordinates between the three common formats — Decimal Degrees (DD), Degrees Decimal Minutes (DDM), and Degrees Minutes Seconds (DMS) — with full precision and no rounding surprises. Paste a latitude and longitude in any format and instantly get all three representations side by side, complete with a live OpenStreetMap preview ...
Try the Tool »GitHub Actions Workflow Generator Compose a valid .github/workflows/main.yml file from a guided form. Pick a language stack, choose triggers, toggle lint/test/build/deploy steps, and the generator emits a syntactically correct workflow you can drop straight into a repository. How to Use Set a Workflow Name (this becomes the label in the Actions tab). Pick a Stack ...
Try the Tool »FIRE Calculator (Financial Independence, Retire Early) Plug in your income, expenses, current savings and expected real return to see your FIRE number, how many years it will take to reach financial independence, your Coast FIRE point, and a side-by-side sensitivity table that shows how shifting your savings rate moves your retirement age. Everything runs in ...
Try the Tool »Uptime / SLA Calculator Translate any service level agreement target into the precise downtime budget you are allowed across a year, quarter, month, week, day, or hour. The calculator works in three directions: convert an SLA percentage into allowed downtime, work backwards from a downtime ceiling to the SLA percentage you must commit to, and ...
Try the Tool »Web Vitals Score Calculator Plug in your LCP, INP, and CLS measurements and instantly see how your page rates against Google’s Core Web Vitals thresholds. The calculator returns a Good / Needs Improvement / Poor verdict per metric, a pass/fail summary for the page, and concrete fix suggestions for anything below target — all client-side, ...
Try the Tool »Font Modular Scale Generator The Font Modular Scale Generator builds a complete typographic scale from a single base size and a chosen mathematical ratio. Each step in the scale is the previous step multiplied by the ratio, so headings, body text, and small print stay in proportion across every screen. How to Use Set the ...
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 Jun 20, 2026
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