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Developer Tools

Free browser-based utilities that streamline coding tasks with instant text processing, data conversion, and validation capabilities.

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CSS Logical Properties Converter

CSS Logical Properties Converter Paste a block of CSS and instantly swap physical box-model properties (margin-left, padding-right, border-top-left-radius, top/left/right/bottom, width/height) for their writing-mode-aware logical equivalents (margin-inline-start, padding-inline-end, border-start-start-radius, inset-block-start, inline-size) — or reverse the conversion. The mapping is fully deterministic and covers margin, padding, border, border-radius corners, inset positions, sizing, overflow, plus directional values for ...

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Developer

JSON to GraphQL Type Definitions Generator

JSON to GraphQL Type Definitions Generator Paste any JSON object or array and instantly receive a GraphQL Schema Definition Language (SDL) document that describes its shape. The generator walks the JSON tree, infers scalar types, names nested objects, merges array-of-object variants, and emits an optional root Query type so the output is ready to drop ...

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DataDeveloper

Loan-to-Value (LTV) Ratio Calculator

Loan-to-Value (LTV) Ratio Calculator This calculator measures how much of a property’s value is financed by debt. Enter the property value and your mortgage balance to see the LTV ratio, your home equity, whether private mortgage insurance (PMI) is required, and how your LTV compares to the limits set by Conventional, FHA, VA, USDA, Jumbo, ...

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DeveloperMath

TypeScript Type Stripper

TypeScript Type Stripper The TypeScript Type Stripper turns TypeScript source into clean, runnable JavaScript by erasing every compile-time construct the language adds on top of ECMAScript. Type annotations, interface declarations, type aliases, generic parameters, enums, decorators, and non-null assertions are removed in a single deterministic pass while the runtime logic of your program is preserved ...

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DataDeveloper

Carbon Footprint Estimator

Carbon Footprint Estimator Estimate your annual personal carbon footprint in tonnes of CO2-equivalent (tCO2e) across transport, home energy, food, and consumer goods. The estimator uses published EPA, IPCC AR6, IEA, and peer-reviewed emission factors to convert lifestyle inputs into a transparent category breakdown, then compares your total to per-capita averages for major countries and estimates ...

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DataDeveloper

Tailwind CSS Classes to Plain CSS Converter

Tailwind CSS Classes to Plain CSS Converter Paste a string of Tailwind v3 utility classes and instantly get the equivalent plain CSS rule. Each Tailwind class is expanded to its exact CSS declaration with the correct rem, px, and color values from the official design tokens — no guessing, no rounding. Useful when migrating a ...

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DeveloperText

Sitemap XML Parser & URL Extractor

Sitemap XML Parser & URL Extractor Paste any sitemap.xml or sitemap index file and instantly pull out every URL along with its lastmod, changefreq, and priority. The parser runs entirely in your browser using the native DOMParser, so nothing leaves the page. Filter by recency, sort by any column, export to Markdown, CSV, JSON, or ...

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DataDeveloper

CSS Media Query Generator

CSS Media Query Generator Build precise CSS @media rules for any breakpoint and feature combination without memorizing syntax. Pick a framework preset, choose the query type, and toggle the extra media features you need — the tool stitches together a valid block with both classic and modern range syntax. How to Use Pick a Framework ...

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ColorDeveloper

Aurora / Gradient Blob CSS Background Generator

Aurora / Gradient Blob CSS Background Generator Build soft, glowing aurora-style backgrounds with up to four colored orbs you can drag, recolor, and resize on a live canvas. The tool outputs production-ready CSS using radial-gradient and filter: blur(), or a portable SVG using feGaussianBlur — so you can drop the result into any website, landing ...

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ColorDeveloper

OpenAPI v2 to v3 Converter

OpenAPI v2 to v3 Converter Paste a Swagger 2.0 specification and get a valid OpenAPI 3.0.3 version back in either JSON or YAML. The converter applies the official structural mapping rules — moving definitions under components/schemas, collapsing host, basePath, and schemes into servers, splitting consumes and produces into per-operation content maps, and reshaping form parameters ...

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DataDeveloper

DNS Propagation Checker

DNS Propagation Checker When you change a DNS record — pointing a domain at a new server, swapping email providers, or rotating verification TXT entries — the update does not reach the rest of the internet at the same speed. Every recursive resolver caches answers for the length of the record’s TTL, so users on ...

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DeveloperNetworking

SVG Filter Effects Generator

SVG Filter Effects Generator Design SVG <filter> effects visually. Pick a filter primitive — Gaussian blur, color matrix variants (hue rotate, saturate, luminance to alpha), turbulence with displacement, drop shadow, or a convolve matrix preset (emboss, engrave, sharpen, edge detect) — and tune its parameters with sliders while watching a live SVG preview on text, ...

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ColorDeveloper

Email Signature HTML Generator

Email Signature HTML Generator Build a polished, copy-ready HTML email signature in seconds. Pick a layout, drop in your name, role, contacts, social links, accent color and optional profile photo or company logo — the tool renders a live preview and emits inline-styled HTML that pastes cleanly into Gmail, Outlook, Apple Mail and most other ...

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DeveloperText

EV Charging Cost Calculator

EV Charging Cost Calculator Estimate exactly how much your next electric vehicle charge will cost — at home or at a public station — and how long it will take on a Level 1 outlet, a Level 2 wallbox, or a DC fast charger. Punch in your battery size, current state of charge, target percentage, ...

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DataDeveloper

Dew Point & Absolute Humidity Calculator

Dew Point & Absolute Humidity Calculator Enter the air temperature and relative humidity and the tool returns the dew point, wet-bulb temperature, NOAA heat index, saturation and actual vapor pressure, absolute humidity in g/m³, mixing ratio, specific humidity, moist air density, and a plain-language comfort rating. Numbers update as you type, no clicks or server ...

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DeveloperMath

TLS/SSL Config Snippet Grader

TLS/SSL Config Snippet Grader Paste an Apache or Nginx TLS/SSL configuration block and get an instant A–F grade based on Mozilla’s Server Side TLS guidelines. The grader flags deprecated protocols, weak ciphers, missing HSTS, and other security issues, then suggests a Mozilla-aligned replacement snippet you can drop straight into your server config. How to Use ...

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DeveloperNetworking

Scala Code Formatter (Scalafmt Style)

Scala Code Formatter (Scalafmt Style) Paste raw Scala source and get back code formatted in the Scalafmt house style — 2-space indentation, balanced braces, normalized operator spacing, sorted imports, and consistent trailing commas. Output is deterministic, so the same input always produces the same result, which means cleaner diffs in code review and no more ...

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DeveloperText

CSS Email Inliner (Style Attribute Inliner)

CSS Email Inliner (Style Attribute Inliner) Turn HTML with a <style> block into email-ready markup with every CSS rule moved into inline style=”” attributes. Email clients strip or ignore <style> blocks, so inlining is the only reliable way to keep your design intact across Gmail, Outlook, Yahoo, and Apple Mail. Paste your full HTML on ...

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DeveloperText

DNS Record TTL Expiry Calculator

DNS Record TTL Expiry Calculator Plan DNS changes with confidence. Paste the records you just queried, set the moment they were fetched, and this calculator pinpoints the exact second every cached copy expires across resolvers — plus the safer “all-zones clear” propagation window for your migration. How to Use Paste one record per line in ...

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DeveloperMath

GeoJSON ↔ WKT Spatial Data Converter

GeoJSON ↔ WKT Spatial Data Converter Convert geometries back and forth between GeoJSON and WKT (Well-Known Text) without ever wondering whether your coordinates got swapped. Paste either format, pick a direction (or let auto-detect do it), and watch the geometry render on a live OpenStreetMap preview so you can verify the shape before it goes ...

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DataDeveloper
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