Convert between CSV and JSON, flatten nested API payloads, and reshape arrays for warehouse loads or marketing CRMs. Source files stay on your device; signed-in dashboards only receive usage metadata.
Pure JSON utilities — prettify, validate, flatten, anonymise, diff, mock, and reshape JSON without crossing into another file format.
Recursively flatten deeply nested JSON objects into a single-level key-value map using dot-notation. Configurable delimiter and depth. No upload.
Format and prettify JSON with 2 spaces, 4 spaces, or tabs. Sort keys alphabetically for readable diffs. Browser-based, no upload required.
Generate realistic fake JSON data for software testing, API mocking, and AI training datasets. Names, emails, UUIDs, dates, and custom templates.
Rebuild a nested JSON hierarchy from a flat dot-notation key-value map. Reverses JSON flattening and CSV column exports. No upload required.
Remove all whitespace from JSON for production payloads and API responses. Shows compression savings. Browser-based, no upload required.
Remove null, undefined, empty strings, and empty arrays from JSON recursively. Clean up API responses and data exports. Browser-based, no upload.
Automatically generate a valid JSON Schema (Draft 7) from any JSON data sample. Infers types, required fields, and nested object shapes. No upload.
Validate JSON syntax in real time. See exact line and column of errors, common mistake hints, and structure summary. Browser-based, no upload.
Replace sensitive PII values in JSON with realistic fake data for GDPR compliance, safe sharing, and QA. Configurable key-to-strategy mapping. No upload.
Test JSONPath expressions against any JSON document and see matching nodes instantly. Supports $, .[], * and recursive descent. No upload required.
Automatically fix common broken JSON: missing quotes on keys, trailing commas, single quotes, and unescaped characters. Browser-based, no upload.
Remove specific keys from every level of a JSON object or array. Bulk-strip PII fields like id, password, and email recursively. No upload required.
Rename keys across thousands of JSON objects in one pass. Supports camelCase, snake_case, PascalCase conversion or custom rename maps. No upload.
Highlight added, removed, and changed keys between two JSON objects or arrays. Recursive deep diff with colour-coded output. No upload required.
Invert a JSON object by swapping keys and values, or pivot an array of objects into a columnar shape. Browser-based, no upload required.
Visualise and explore large JSON files in an interactive collapsible tree. Search keys and values, expand/collapse nodes, copy paths. No upload.
Deep-merge or concatenate multiple JSON files into one. Choose overwrite, first-wins, or array-append collision strategy. Browser-based, no upload.
Bridge converters that move data between JSON and CSV, Excel, XML, YAML, SQL, Markdown, TypeScript, or Zod. Also surfaced on the file conversion hub.
Convert any CSV file to JSON instantly in your browser. Choose array of objects, NDJSON, or grouped/nested output. Type inference, no upload, no signup.
Convert JSON, NDJSON, or JSON Lines to CSV in your browser. Auto-flattens nested objects with dot-notation keys. No upload, no signup.
Convert an Excel spreadsheet to a JSON array in your browser. Supports multi-sheet workbooks, header detection, and type inference. No upload.
Convert JSON objects and arrays to well-formed XML in your browser. Configurable root element, attribute prefix, and indent. No upload required.
Convert a JSON object or array into TypeScript interface or type definitions. Configurable naming, optional vs required, and nested type extraction.
Parse XML files and data feeds into clean JSON in your browser. Attribute handling, array coercion, and namespace stripping options. No upload.
Convert any JSON object into a ready-to-use Zod validation schema. Supports nested objects, arrays, unions, and optional fields. No upload.
Convert YAML config files, Docker Compose, and Kubernetes manifests to JSON in your browser. Handles anchors, aliases, and multi-doc streams.
Convert JSON to clean YAML for Docker Compose, Kubernetes, and GitHub Actions configs in your browser. Configurable indent and line width. No upload.
Convert a JSON array into SQL INSERT statements for Postgres, MySQL, or SQLite. Auto-detects types, generates CREATE TABLE, configurable table name.
Convert a JSON array into a clean Markdown table for GitHub READMEs, documentation, and Notion. Configurable columns and alignment. No upload.
Use-case guides cover MongoDB, Firestore, Postman, BigQuery, Mailchimp, Stripe, GraphQL, GA4, and more — each tied to the right JSON tool with worked steps.
Each JSON tool runs entirely in your browser — no upload, no signup required to convert. CSV to JSON outputs array, NDJSON, or grouped shapes with type inference. JSON to CSV flattens nested API payloads into dot-notation columns ready for spreadsheets and warehouses.