Find the developer tool you need

JSON to Java Converter Guide

Convert JSON to Java DTOs directly on the Java landing page without leaving for the main converter.

JSON to Kotlin Data Class

Convert JSON to Kotlin data classes directly on the Kotlin page and review nullable fields and nested objects in one screen.

JSON to TypeScript Interface

Convert JSON to TypeScript interfaces directly on the TypeScript page and review API contracts in one workspace.

JSON Diff Tool

Compare two JSON payloads and inspect field-level changes for debugging and regression reviews.

JSON Schema Generator

Generate JSON Schema from payload samples and document API contracts faster.

Avro Schema Generator

Build Avro schemas from sample payloads for event and messaging workflows.

Avro Message Generator

Create Avro message payloads for Kafka and schema-driven integration testing.

Avro Encode Tool

Encode JSON payloads into Avro bytes for messaging and serialization tests.

Avro Decode Tool

Decode Avro payloads and inspect event contents without leaving the browser.

Kafka Message Generator

Generate Kafka-ready message samples for local testing and contract reviews.

JWT Debugger

Inspect JWT headers, payload claims, and expiration details for debugging.

JWT Generator

Generate HS256 JWT tokens in the browser for local API testing and auth debugging.

UUID Generator

Generate UUID values for fixtures, request ids, and event identifiers.

Password Generator

Generate temporary passwords and AES random keys with configurable size and output rules.

API Key Generator

Generate API key strings with prefixes and grouped formatting options.

JSON Formatter

Format and prettify JSON strings for debugging and documentation.

Base64 Encode Decode Tool

Encode and decode Base64 strings for API and integration work.

Image to Base64 · Base64 to Image Converter

Convert PNG, JPEG, GIF, WebP, and SVG images to Base64 Data URLs or restore Base64 into downloadable images locally in the browser.

Curl Generator

Build reproducible curl requests for API debugging and handoff.

JSON CSV Converter

Convert JSON to CSV for exports, data review, and spreadsheet workflows.

Hash Generator (MD5, SHA, HMAC)

Compute MD5, SHA-1/256/384/512 digests and HMAC signatures in the browser with hex or base64 output.

Regex Tester

Test JavaScript regular expressions live, inspect capture groups and named groups, and preview replacement output.

JSON to Go Struct Converter

Paste any JSON and instantly get a Go struct with json tags, time.Time detection, and clean nested types.

JSON to Pydantic Model Generator

Generate Pydantic v2 BaseModel (or v1) classes from JSON, with snake_case conversion, Field aliases, and datetime detection.

JSON to YAML Converter

Two-way JSON / YAML converter for Kubernetes, GitHub Actions, Docker Compose, and Helm configurations.

JSON to SQL DDL (CREATE TABLE) Generator

Generate MySQL or PostgreSQL CREATE TABLE DDL from JSON row samples with type inference and NOT NULL detection.

Unix Timestamp Converter

Convert Unix epoch timestamps to ISO 8601, UTC, and local time with auto-detected unit (seconds, ms, microseconds).

Timestamp Converter

Convert between Unix timestamps, ISO 8601, RFC 2822, and timezone-local times with automatic unit detection.

Log Filter (grep-style)

Filter log lines with AND-combined search terms, NOT exclusion, case-insensitive and regex options — like a grep pipeline in the browser.

JSON to C# Class Generator

Generate .NET C# classes or records from JSON with System.Text.Json attributes, init setters, DateTime and Guid detection.

JSON to Rust Struct (serde) Generator

Generate serde-friendly Rust structs with snake_case rename, chrono DateTime, and configurable derives.

JSON to Zod Schema Generator

Generate Zod schemas from JSON examples with email/url/uuid/datetime detection and z.infer type export.

JSONPath Tester

Test JSONPath expressions live: wildcards, recursive descent, slices, union indexes.

URL Encode / Decode

Encode and decode URLs and query strings with encodeURIComponent, encodeURI, and form-urlencoded modes; parse parameters into a table.

Cron Expression Parser

Parse 5-field cron expressions and aliases into human descriptions and the next 8 scheduled runs.

JSON to Swift Codable Generator

Generate Swift Codable structs or classes from JSON with CodingKeys, Date / UUID / URL detection.

JSON to Dart Class (Flutter) Generator

Generate Flutter/Dart classes from JSON with fromJson/toJson serialization and DateTime detection.

JSON ↔ XML Converter

Two-way JSON / XML converter for SOAP, RSS, and legacy enterprise payloads.

JSON to Protobuf (.proto) Generator

Generate proto3 message definitions from JSON with google.protobuf.Timestamp mapping and nested messages.

JSON to GraphQL SDL Generator

Generate GraphQL SDL types from JSON with DateTime and UUID scalar detection.

JSON to Markdown Table Docs Generator

Convert JSON into per-class Markdown documentation tables (Field / Type / Required / Description) ready for Confluence and GitHub.

JSON Path Finder

Interactive JSON tree with one-click JSONPath copy for every node.

Color Converter (HEX/RGB/HSL/OKLCH)

Convert color values between HEX, RGB, HSL, and OKLCH with live preview.

JSON Visualizer (Tree Graph)

Render any JSON payload as an SVG tree graph and download as .svg.

Markdown Editor / Preview

Live Markdown editor with HTML preview, copy to MD/HTML, and .md download.

QR Code Generator

Generate QR codes for URLs and short text fully in the browser with configurable size and colors.

Password Hash (PBKDF2) Generator & Verifier

Hash and verify passwords with PBKDF2-SHA-256/512 via SubtleCrypto in PHC-style output.

JSON Schema → Mock Data Generator

Generate sample data from a JSON Schema (draft-07) with format, enum, required, and min/max constraints; seedable for reproducible output.

Case Converter (camelCase, snake_case, PascalCase)

Convert text into 13 cases at once: camelCase, PascalCase, snake_case, SCREAMING_SNAKE, kebab-case, Train-Case, Title Case, dot.case, path/case.

JSON Patch (RFC 6902) Generator & Apply

Generate RFC 6902 JSON Patch from two JSONs, or apply a patch (add/remove/replace/move/copy/test) to an existing JSON document.

DDL → Java / TypeScript / Go / Pydantic Converter

Generate Java (JPA / Lombok), TypeScript interface, Go struct, and Pydantic models from MySQL or PostgreSQL CREATE TABLE DDL.

SQL Formatter / Beautifier

Format SQL queries with keyword-aware line breaks and indentation. Supports tab/space and uppercase keyword options.

JSON → MySQL / PostgreSQL INSERT Generator

Convert JSON arrays or objects into MySQL/PostgreSQL INSERT statements for fixture and seed SQL generation.

MySQL ↔ PostgreSQL DDL Converter

Convert CREATE TABLE DDL between MySQL and PostgreSQL with type mapping, AUTO_INCREMENT ↔ SERIAL, and identifier quoting.

DDL Schema Diff → ALTER TABLE Generator

Compare two CREATE TABLE DDLs and generate ALTER TABLE migration SQL with column and index changes.

Bcrypt Hash Generator & Verifier

Generate and verify bcrypt password hashes in the browser with a configurable cost factor and standard $2b$ output.

JWT Key Tools: RSA / ECDSA Key Pair + JWK ↔ PEM

Generate RSA, RSA-PSS, RSA-OAEP, ECDSA, and ECDH key pairs in the browser and convert between JWK and PEM formats.

File Hash (MD5 / SHA-256) Checksum Calculator

Drag & drop a file to compute MD5, SHA-1, SHA-256, and SHA-512 checksums in the browser. Large files are streamed in chunks and never uploaded.

SQL Snippets — Save & Search Queries Locally

Save frequently used SQL queries with titles in your browser, then search, tag, copy, export/import as JSON, and send to the SQL Formatter. Nothing is uploaded.