Database & ERD Tools

Create dynamic and reusable AI prompts with ease.

Count tokens for GPT-4, Claude, Gemini and more — 100% client-side.

Build MCP server configurations visually for AI tools.

Test and send HTTP requests directly from your browser. A fast, privacy-first API client supporting GET, POST, PUT, and DELETE methods.

Design, edit, and validate OpenAPI 3.x specifications with real-time validation and beautiful docs preview. YAML/JSON support with live preview.

Compare two OpenAPI 3.x specifications side by side. Detect added, removed, and changed endpoints, schemas, parameters, and responses — all browser-based.

Test and debug regular expressions instantly with live match highlighting and flag support.

Convert JSON into clean, strongly-typed code in multiple programming languages. Generate models, classes, and structs instantly from JSON.

Convert XML into clean, strongly-typed code across multiple languages. Supports attributes, namespaces, and complex XML schemas.

Convert YAML into clean, strongly-typed code for multiple languages. Supports nested schemas, anchors, and configuration files.

Compose JSON tools into reusable pipelines with step-by-step execution.

Make your JSON sparkle with clean, readable formatting.

Switch your JSON to human-friendly YAML on the fly.

Visually build, edit, and manage JSON Schema with an intuitive GUI — no manual schema writing needed.

Convert your JSON to clean, readable TOML config format instantly.

Generate and visualize ER diagrams from SQL schemas using SchemaCode.

Convert complex XML to friendly JSON in seconds.

Convert readable YAML into structured JSON effortlessly.

Switch between base64 and other formats with ease.

Generate and download images from base64 text

Timestamp Converter: Effortlessly convert UNIX time to human-readable format and back.

Cron Helper: Build, validate, and understand crontab expressions visually with live previews and next-run insights.

Age Calculator: Quickly calculate your age in years, months, and days from your date of birth.

JWT creation made simple — sign, encode, go

Decode JWTs safely — fast, clean, and offline

Generate UUID v1: time-based unique identifiers for distributed systems.

Generate UUID v3: name-based UUIDs using MD5 hashing.

Generate UUID v4: random UUIDs for general-purpose unique IDs.

Generate UUID v5: name-based UUIDs using SHA-1 hashing.

Generate UUID v7: time-ordered, sortable UUIDs ideal for databases.

Generate GUIDs: Microsoft-style UUIDs compatible across platforms.

Generate ULIDs: lexicographically sortable unique IDs for modern apps.

Encode URLs to URL-safe format instantly.

Decode URL-encoded strings back to plain text.

Encode JSON objects to URL-safe strings.

Decode URL-encoded strings back to JSON.

Encode XML to URL-safe strings.

Decode URL-encoded strings back to XML.

Encode YAML to URL-safe strings.

Decode URL-encoded strings back to YAML.

Sort lines of text alphabetically or numerically.

Remove duplicate lines from text instantly.

Count the number of words in your text.

Count the number of characters in your text.

Count the number of lines in your text.

Count duplicate lines in your text.

Convert spaces to newlines or vice versa.

Sort words in your text alphabetically.

Convert strings between camelCase, PascalCase, snake_case, kebab-case, and more.

Build MCP server configurations visually — generate Model Context Protocol configs for AI tools.