jsonversal

Online Developer Tools

Every tool runs 100% in your browser. No signup, no upload, unlimited and free. Use the filter to find what you need.

Showing 16 of 16 tools

LLM Token & Pricing Calculator

Estimate tokens and cost across GPT, Claude, Llama and Gemini.

Structured Output JSON Schema Generator

Create strict JSON Schema for LLM structured output.

JSON Schema Sample Data Generator

Generate sample JSON that satisfies your schema.

JSON to Pydantic Model

Generate Pydantic v2 BaseModel classes from JSON.

JSON to Zod Schema

Infer a Zod validation schema from a JSON sample.

JSON to TypeScript Interface

Generate type-safe TypeScript interfaces from JSON.

JSONPath Tester

Test JSONPath expressions against your JSON.

JSON Diff

Compare two JSON documents and list the differences.

JSON Formatter & Validator

Pretty-print, validate, and minify JSON with configurable indentation.

JSON to Go Struct

Generate Go structs with json tags from a JSON sample.

JSON to C# Class

Generate C# classes with Newtonsoft attributes from JSON.

UUID v7 Generator & Timestamp Decoder

Generate RFC 9562 UUID v7 and decode its timestamp.

Markdown Editor & Live Preview

Write Markdown and see a rendered HTML preview as you type.

Text Diff

Compare two texts with a side-by-side view and a git-style unified diff.

JSON Escape & Unescape

Escape plain text into a JSON string literal, or decode it back.

JSON Sorter & Deduper

Sort object keys and array items, and dedupe duplicate values.