Developer Tools

Utilities for everyday development work: hashing, encoding, color codes, regex testing, validators, generators, and more -- all free and processed entirely in your browser.

Format and validate JSON data.

Test and debug regex patterns.

Decode JSON Web Tokens securely.

Compress CSS code instantly.

Compress JavaScript code instantly.

Compress HTML payload size.

CSS Grid Generator

Visually generate CSS Grids.

Box Shadow Generator

Create CSS drop shadows.

Gradient Generator

Generate CSS linear gradients.

Gradient Library

Browse curated, ready-to-use CSS gradients.

Flexbox Generator

Generate CSS Flexbox layouts.

QR Code Generator

Create custom QR codes free.

Cron Job Parser

Translate cron to plain English.

Beautify messy SQL queries.

Explore JSON as a collapsible tree.

Check JSON syntax and see errors.

Pretty-print and indent XML.

Sitemap Generator

Build a sitemap.xml from your URLs.

QR Code Scanner

Decode QR codes from image or camera.

HTML Beautifier

Format and pretty-print HTML code.

Format and pretty-print SQL queries.

Validate XML code and check for errors.

View & format XML with syntax highlighting.

Minify JSON by removing whitespace.

Format and pretty-print CSS code.

Robots.txt Generator

Generate a robots.txt file for your website.

Encode text into a URL-safe string.

Format and indent YAML cleanly.

Clean up and align CSV data.

Cron Expression Generator

Build cron schedules visually.

Check YAML syntax for common errors.

Color Contrast Checker

Check WCAG contrast ratios between colors.

Create URL-friendly slugs from text.

JavaScript Beautifier

Beautify or minify JavaScript code.

Regex Generator

Build regex patterns visually with a live preview.

Compress SQL queries to reduce size.

API Key Generator

Create secure random API keys.

Code128 Barcode Generator

Turn text into a scannable Code128 barcode.

CSS Animation Generator

Build CSS keyframe animations visually.

CSS Clip-Path Generator

Create custom shapes with clip-path visually.

CSS Filter Generator

Build CSS filter effects with sliders.

CSS Gradient Text Generator

Create gradient-filled text with CSS.

CSS Text Shadow Generator

Build CSS text-shadow effects visually.

EAN-13 Barcode Generator

Generate scannable EAN-13 retail barcodes.

Hex Color Generator

Generate random hex color palettes.

Leap Year Checker

Check if a year is a leap year.

MD5 Hash Generator

Generate an MD5 hash from any text.

Meta Tag Generator

Generate HTML meta tags for SEO.

Open Graph Generator

Generate Open Graph & Twitter Card tags.

Password Hash Generator

Hash a password with MD5, SHA-1, or SHA-256.

Regex Cheat Sheet

Quick reference for regex syntax & patterns.

RGB Color Generator

Generate random RGB color palettes.

SHA-256 Hash Generator

Generate a SHA-256 hash from any text.

Basic SQL sanity checker for common issues.

Break a URL into its component parts.

Validate a UUID and detect its version.

JSON to TypeScript

Generate TypeScript interfaces from JSON.

JSON to Go Struct

Generate Go structs from JSON.

JSON to Go BSON

Generate Go structs with json + bson tags.

Generate Java POJO classes from JSON.

Generate Kotlin data classes from JSON.

JSON to Scala Case Class

Generate Scala case classes from JSON.

JSON to Rust Serde

Generate Rust structs from JSON.

JSON to Zod Schema

Generate Zod schemas from JSON.

Generate io-ts codecs from JSON.

JSON to JSON Schema

Generate a JSON Schema from JSON.

Generate JSDoc @typedef blocks from JSON.

JSON to MobX-State-Tree

Generate MST models from JSON.

JSON to Mongoose Schema

Generate Mongoose schemas from JSON.

Generate MySQL CREATE TABLE statements from JSON.

JSON to React PropTypes

Generate React PropTypes from JSON.

JSON to Sarcastic

Generate Sarcastic schemas from JSON.

Convert JSON to a TOML document.

Convert JSON to a YAML document.

JSON to GraphQL

Generate a GraphQL schema from JSON.

JSON to BigQuery Schema

Generate a BigQuery table schema from JSON.

JSON Schema to TypeScript

Generate TypeScript interfaces from a JSON Schema document.

JSON Schema to Zod

Generate a Zod schema from a JSON Schema document.

JSON Schema to OpenAPI

Generate an OpenAPI schema fragment from a JSON Schema document.

JSON Schema to Protobuf

Generate a Protocol Buffers message from a JSON Schema document.

Generate Flow types from JSON.

Convert SVG markup into a React JSX component.

SVG to React Native

Convert SVG markup into a react-native-svg component.

Convert raw HTML into valid JSX.

Convert HTML markup into Pug template syntax.

CSS to JS Objects

Convert CSS rules into JS style objects.

CSS to Template Literal

Convert CSS rules into styled-components templates.

CSS to Tailwind CSS

Best-effort conversion of CSS into Tailwind classes.

JavaScript to JSON

Convert a permissive JS object literal into strict JSON.

GraphQL to Introspection JSON

Run a real introspection query against your GraphQL SDL.

GraphQL to Schema AST

Parse a GraphQL SDL schema into a clean, readable AST.

GraphQL to TypeScript

Generate TypeScript interfaces from a GraphQL SDL schema.

GraphQL to Flow

Generate Flow types from a GraphQL SDL schema.

GraphQL to JAVA

Generate Java POJO classes from a GraphQL SDL schema.

GraphQL to Resolvers Signature

Generate resolver map stubs from a GraphQL SDL schema.

GraphQL to Fragment Matcher

Generate Apollo's IntrospectionFragmentMatcher JSON.

GraphQL to TypeScript MongoDB

Generate TypeScript interfaces with an approximate _id field.

GraphQL to Components

Scaffold a React component from a GraphQL operation.

JSON-LD to Compacted

Compact a JSON-LD document using its context.

JSON-LD to Expanded

Expand a JSON-LD document into full IRIs.

JSON-LD to Flattened

Flatten a JSON-LD document into one node array.

JSON-LD to Framed

Reshape a JSON-LD document with a frame.

JSON-LD to N-Quads

Convert JSON-LD to N-Quads RDF.

JSON-LD to Normalized

Canonicalize JSON-LD with URDNA2015.

TypeScript to Flow

Convert TypeScript interfaces to Flow types.

TypeScript to JSON Schema

Convert TypeScript interfaces to JSON Schema.

TypeScript to Plain JavaScript

Strip types from TypeScript to plain JS.

TypeScript to Declaration (.d.ts)

Generate .d.ts files from TypeScript source.

TypeScript to Zod Schema

Convert TypeScript interfaces to Zod schemas.

JavaScript to TypeScript

Add best-effort type annotations to JS.

Flow to Plain JavaScript

Strip Flow type annotations from source code.

Flow to TypeScript Declaration

Convert Flow types to a TypeScript declaration.

Flow to TypeScript

Convert Flow source to TypeScript (best-effort).

Convert TOML config files to JSON.

Convert TOML config files to YAML.

Convert YAML config files to TOML.

JSON Tree Viewer

Search & explore JSON as a tree.

XML Pretty Print

Pretty-print or minify XML.

Explore YAML as a collapsible tree.

CSS Triangle Generator

Generate pure-CSS triangles.

WiFi QR Code Generator

Turn WiFi credentials into a QR code.

Contrast Color Finder

Find the best text color for a background.

Twitter Card Generator

Generate Twitter/X Card meta tags.

Check CSV structural well-formedness.

Country Code Finder

Find ISO & calling codes by country.

CSS Border Radius Generator

Visually generate border-radius CSS.

SHA-1 Hash Generator

Generate a SHA-1 hash from any text.

Canonical URL Generator

Strip tracking params and generate a canonical tag.

curl Command Generator

Build a properly escaped curl command.