24 tools and growing

Developer tool library

Browser-first utilities for working developers. Everything runs locally — no accounts, no uploads, no data ever leaves your device.

{ }

Formatters

Code formatters make messy, compressed output readable. Paste a raw API response, a minified stylesheet, or an unindented SQL query and get back clean, indented output. All formatting runs in your browser — no server, no upload.

JSON Formatter & Validator

Format, validate, and minify JSON instantly with a browser-first editor.

Sort keysCopy compact

SQL Formatter

Format raw SQL with dialect support for SQL Server, MySQL, PostgreSQL, SQLite, and more.

6 dialectsSize stats

Regex Tester & Builder

Live regex testing with match highlighting, capture groups, and flag controls.

Live matchingGroup capture

YAML Formatter & Validator

Format and validate YAML, or convert between YAML and JSON. Essential for Kubernetes, Docker, and CI configs.

Format YAMLYAML ↔ JSON

Cron Expression Parser

Parse any cron expression into plain English and see the next 12 scheduled run times.

Next 12 runsPlain English

GraphQL Playground

Write and execute GraphQL queries against a schema with mock data — no server needed.

Mock resolversSchema explorer

SQL Runner (SQLite)

Run SQL queries against an in-browser SQLite database. Paste your schema, seed data, and query — instant results.

SQLite WASMSchema explorer

Accessibility Checker

Audit HTML for WCAG 2.1 AA accessibility violations using axe-core — critical, serious, moderate, and minor issues.

axe-coreWCAG 2.1 AA

⇄

Converters

Schema converters generate boilerplate that would otherwise take minutes to write by hand. Convert a JSON payload to typed C# classes, scaffold a SQL CREATE TABLE from a C# entity, or generate sample JSON from a model definition.

C# Class to JSON Converter

Generate sample JSON from C# classes, including nested classes, dictionaries, and lists.

Nested classesDictionary support

JSON to C# Class Converter

Convert JSON payloads into C# classes with nested types, arrays, DateTime, and Guid detection.

Custom root nameDateTime detection

C# Class to SQL Table Generator

Generate CREATE TABLE statements from C# classes for SQL Server, MySQL, and PostgreSQL.

T-SQL, MySQL, PostgreSQLPK inference

JSON to SQL Table Generator

Generate CREATE TABLE scaffolding from JSON objects with nested structures and arrays.

Nested object supportQuick schema drafts

Env Variable Converter

Convert .env files to Dockerfile, docker-compose, GitHub Actions, Vercel, Kubernetes ConfigMap, and more.

8 output formatsSecret masking

Mock API Generator

Generate realistic fake JSON data from a JSON Schema, OpenAPI 3.x spec, or a sample JSON object shape.

JSON SchemaOpenAPI 3.x

Color Palette Generator

Extract color palettes from images or build them manually. Export to CSS variables, Tailwind config, SCSS, or JSON with WCAG contrast grades.

Extract from imageWCAG contrast

▪

Minifiers

Asset minifiers shrink CSS, JavaScript, and HTML for faster delivery. Use them to reduce payload size for standalone scripts, email templates, and embeddable widgets — or to read vendor-minified files by expanding them first.

CSS Minifier & Beautifier

Minify or beautify CSS for quick inspection and front-end debugging.

MinifyBeautify

JavaScript Minifier

Reduce JavaScript payload size for quick inspection and manual optimization.

Smaller bundlesQuick checks

HTML Minifier

Collapse HTML markup, remove comments, and preview smaller output instantly.

Preserve comments optionWhitespace collapse

Encoders

Encoding tools handle the binary-safe representations developers need daily: Base64 for embedding files in JSON, URL encoding for safe query strings, JWTs for inspecting auth tokens, and cryptographic hashes for checksums and signatures.