Data Transformation

JSON Validator JSON Visualizer JSON to TypeScript Interface Generator

JSON Formatter

Format, minify, and filter JSON by keys

APIs Frontend

JSON Schema Validator / Generator

Validate JSON with Draft 2020-12 or generate starter schemas

JSON Validator JSON Formatter JSON to TypeScript Interface Generator

APIs Security

JSON to TypeScript Interface Generator

Generate TypeScript interfaces from JSON samples

JSON Validator JSON Formatter JSON Schema Validator / Generator

Frontend APIs

JSON Validator

Validate & pretty-print JSON

JSON Formatter JSON Schema Validator / Generator cURL to fetch / Axios

JSON Validator JSON Formatter CSV to JSON

JSON Visualizer

Visualize and filter JSON as an interactive node graph

Case Converter Word Frequency Counter Query String Parser / JSON Converter

Line Sort / Unique / Deduplicate

Sort lines, remove duplicates, or combine both

Case Converter ASCII / Unicode Explorer Word Frequency Counter

Reverse Text

Reverse text by character or word

CS Encoding

SQL Formatter

Format SQL queries with dialect-aware rules

Code Formatter XML Formatter & Validator JSON Formatter

Frontend

UUID Generator

Generate random UUIDs in bulk

Random String Timestamp Converter JSON Schema Validator / Generator

APIs Security

Word Frequency Counter

Analyze word frequency in any text

Case Converter Reverse Text Line Sort / Unique / Deduplicate

XML Formatter & Validator

Format, minify, and validate XML

HTML Formatter YAML ↔ JSON Converter JSON Formatter

APIs Frontend

YAML ↔ JSON Converter

Convert YAML to JSON and JSON to YAML

JSON Formatter JSON Validator XML Formatter & Validator

Workflow Lessons

Normalize API Field Names Before Mapping JSON

Turn human column labels into consistent property names before building a payload mapper.

Spot Hidden Reversed Text in a Broken Payload

Reverse a suspicious field to find whether a payload was mirrored, pasted backward, or intentionally obfuscated.

Find Repeated Terms in a Noisy Log or Document

Count repeated words so the real failure theme stands out from noisy text.

Clean a List of IDs Before a Bulk Import

Sort and deduplicate identifiers before a bulk import creates duplicate work.

Inspect and Fix a Messy XML Response

Format XML before deciding whether the response is malformed or merely hard to read.

Read a Dense SQL Query Before Changing It

Format SQL so joins, filters, and limits are reviewable before you edit production data logic.

Find the JSON Syntax Error Breaking a Request

Validate JSON and locate the exact syntax issue before blaming the API.

Make a Nested JSON Response Readable

Pretty-print a dense response so nested fields can be reviewed and copied safely.

Inspect an Unfamiliar JSON Response Before Changing It

Trace paths, arrays, and inconsistent records in an unfamiliar response before changing the code that consumes it.

beginner 10 min

Turn Messy CSV Into API-Ready JSON

Clean a spreadsheet export into predictable JSON, then inspect the shape before handing it to an API.

Convert a YAML Config Into JSON for an API

Convert configuration data while preserving booleans, arrays, and nested objects.

Generate Types From a Real API Response

Create TypeScript interfaces from actual JSON so client code starts from the real shape.

Validate a Payload Against the Shape You Expect

Use a schema check to separate syntax-valid JSON from contract-valid JSON.

Generate and Check UUIDs for Test Data

Generate UUIDs for fixtures and keep them distinct from meaningful production identifiers.

Generate a Scannable Barcode for a Product Label

Turn a 12-digit GTIN into a print-ready EAN-13 with a computed check digit instead of guessing the thirteenth number.

Compare JSON Payloads Across Environments

Compare a local baseline and a changed payload without confusing ordinary values with structural change.

Find the Record Breaking a JSON Consumer

Use local structure evidence to isolate the record whose shape breaks an otherwise healthy consumer.

intermediate 15 min

Plan a JSON Contract Change

Turn Current and Proposed examples into declared contract intent, local artifacts, and a reviewable rollout plan.

intermediate 14 min

Review Breaking JSON Contract Impact

Review producer, consumer, and rollout consequences without pretending that an inferred sample settles compatibility.