Generate safe synthetic users, products, payments, and orders as JSON, CSV, or REST responses with a local mock API playground and code snippets — 100% browser-side.

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JSON Schema Generator

Generate JSON schema from JSON data

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Curl → Fetch

Convert curl commands to fetch/axios code

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Gitignore Generator

Build .gitignore from 32 stack presets with search, categories, and custom rules — copy or download for Node, Python, Next.js, Docker, and more.

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JSON Code Generator

Convert JSON to TypeScript, Zod, Go, Rust, GraphQL, Kotlin, BigQuery, MySQL, PropTypes, io-ts, Flow, TOML, and more — instant browser-side codegen.

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CSR Generator

Generate SSL CSR and RSA private key in PEM format for HTTPS certificates — fill domain details, copy output for your certificate authority.

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Regex Tester

Test and debug regular expressions

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Hash Generator

Generate MD5, SHA hashes

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URL Encoder

Encode URL strings

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Timestamp Converter

Convert between timestamps and dates

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Cron Generator

Generate cron expressions

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SQL Formatter

Format and beautify SQL queries

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UUID Generator

Generate UUIDs (v1, v4)

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URL Decoder

Decode URL strings

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Code Beautifier

Beautify and format code

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OpenAPI Viewer

View and validate OpenAPI specifications

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YAML Formatter & Validator

Format, validate, and beautify YAML online — Kubernetes, CI/CD, Docker Compose, and app configs with parse errors in your browser.

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CSP Header Generator

Build Content-Security-Policy (CSP) headers and meta tags online — default-src, script-src, and copy-ready output for safer web apps.

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TOML Formatter & Validator

Format and validate TOML online for Cargo, Poetry, pyproject, and config files — fast client-side parsing with clear errors.

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.env File Viewer

Parse dotenv files in the browser — table view, mask secrets for screen shares, and export key-only templates safely.

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HAR File Viewer

Open Chrome or Firefox HAR exports locally — inspect requests, status codes, timing, headers, and copy as cURL.

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HTML Formatter

Format and beautify HTML code online — indent tags, tidy attributes, and copy clean markup in your browser.

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CSS Formatter

Format, beautify, or minify CSS stylesheets online — pretty-print rules and copy production-ready CSS.

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JSON Diff Compare

Compare two JSON documents with tree paths — spot API response and config changes beyond plain text diff.

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XML ↔ JSON Converter

Convert between XML and JSON in the browser — ideal for configs and APIs; pairs with our XML formatter for cleanup.

Popular code beautifiers

Format JavaScript, TypeScript, CSS, HTML, JSON, XML, Markdown, and YAML — each page opens the beautifier with the language preset.

Popular code minifiers

Minify JavaScript, TypeScript, CSS, HTML, JSON, XML, Markdown, and YAML — each page opens the minifier with the language preset.

Popular JSON conversions

Generate TypeScript, Zod, GraphQL, OpenAPI, and more from sample JSON — each page opens the generator with the target format preset.