Data & Formats

JSON, YAML, CSV, XML and Markdown. Reformat them, convert between them, check one parses.

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Markdown18 JSON16 Validators19 CSV & spreadsheets10 Data conversion9 YAML & TOML10 XML6

All tools in Data & Formats

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JSON Schema Generator

Infer a JSON Schema from sample data with format detection

Contributing Guide

Create a CONTRIBUTING.md file for open-source projects

MAC Address Validator

Check if a MAC address is properly formatted

Filter rows by column conditions

CSV & spreadsheets

Inspect base64-encoded Avro binary data

Data conversion

JSON Schema Validator

Validate the structure of a JSON Schema document

Check if a string is a valid URL-friendly slug

Compare two CSV files and show row-level differences

CSV & spreadsheets

Protobuf Viewer

Decode and inspect Protocol Buffer binary wire format data

Data conversion

JSON Path Query

Extract values from JSON using dot notation and bracket syntax

Badge Generator

Create shields.io badge markdown for npm, GitHub, license

Verify Digital Object Identifier format

XML XPath Query

Extract nodes from XML documents using XPath-like expressions

Paste messy TOML and get clean, normalized output

Analyze column types, min/max, mean, median, and unique counts

CSV & spreadsheets

Domain Validator

Check if a domain name is properly formatted

Compare two XML documents and find structural differences

Check your TOML syntax for errors

Credit Card Validator

Check if a card number passes the Luhn algorithm

Check YAML for syntax errors and style issues

Format and prettify INI configuration files

Data conversion

Compare two JSON objects and show added, removed, and changed fields

Markdown Linter

Check Markdown for style issues like trailing whitespace

Check if a UUID is properly formatted and identify its version

Remove whitespace, comments, and indentation from XML documents

YAML Path Query

Extract values from YAML using dot notation

CSV Column Extractor

Pull specific columns from CSV data by name or index

CSV & spreadsheets

Validate INI configuration syntax

Data conversion

Markdown Image Extractor

Find and list all image references including inline images

SemVer Validator

Check if a version string follows SemVer 2.0 format

Convert special characters to XML entities

Compare two YAML documents and see structural differences

Sort rows by any column

CSV & spreadsheets

JSON Tree Viewer

Display JSON as a hierarchical tree with types and values

Markdown Table Generator

Create formatted Markdown tables from headers and data rows

Email Validator

Check if an email follows RFC 5322 format

Prettify and indent XML documents

CSV Deduplicator

Remove duplicate rows from CSV data

CSV & spreadsheets

Remove comments from JSON with Comments (JSONC) to get valid JSON

Data conversion

JSON Remove Nulls

Strip null values from JSON objects and arrays

JavaScript Validator

Check your JS code for syntax errors

Check XML documents for syntax errors

Split multi-document YAML files into individual documents

Protobuf Editor

Format and indent Protocol Buffer .proto files

Data conversion

Issue Template Generator

Create bug report, feature request, question

Phone Validator

Check if a phone number follows international E.164 format

Sort object keys alphabetically in YAML documents

Display CSV data as a formatted, aligned table

CSV & spreadsheets

MessagePack Viewer

Decode and inspect MessagePack binary data

Data conversion

Filter and transform JSON using JMESPath expressions

Markdown Link Checker

Check every link in a Markdown document and flag malformed, local and anchor destinations

Check if an IP address is properly formatted

Compact YAML documents into flow style

Combine two CSV files into one

CSV & spreadsheets

Convert newline-delimited JSON (JSONL) to a JSON array

Data conversion

JSON Schema Faker

Generate realistic mock data from JSON Schema definitions

Check if an IPv6 address is properly formatted

Combine two YAML documents

Normalize and re-format CSV data with configurable quoting

CSV & spreadsheets

Check your YAML documents for syntax errors

Prettify and normalize YAML files

Markdown TOC Generator

Generate a table of contents with anchor links from Markdown

Hex Color Validator

Check if a hex color code is valid

Check CSV structure, column consistency, and syntax errors

CSV & spreadsheets

Avro Schema Formatter

Pretty-print and validate Apache Avro schema JSON

Data conversion

Reconstruct nested objects from flat dot-notation keys

Check if an ISBN-10 or ISBN-13 number is valid

Sort object keys alphabetically in ascending or descending order

Code of Conduct Generator

Create Contributor Covenant, Citizen Code

Check if a URL is properly formatted

Check if an International Standard Serial Number is valid

Compress JSON by removing all whitespace and formatting

Markdown Escaper

Escape special Markdown characters like asterisks, brackets

Hostname Validator

Check if a hostname follows RFC 1123 format

Convert nested JSON into a single-level object with dot-notation

Generate MIT, Apache-2.0, GPL-3.0, BSD-3-Clause

JSON Size Analyzer

Measure JSON structure, nesting depth, and value type distribution

Changelog Generator

Create Keep a Changelog formatted version entries

Markdown Table Formatter

Align columns, normalize padding

PR Template Generator

Create GitHub pull request templates in standard, minimal

Deep merge two JSON objects with configurable array strategies

Prettify and format JSON with configurable indentation

README Generator

Create a README.md template with installation, usage, API

Check JSON syntax and get detailed error information

Markdown Link Extractor

Find and list all hyperlinks including inline links

Markdown Formatter

Beautify and normalize Markdown with consistent spacing

Frontmatter Editor

Parse, add, update, and remove YAML frontmatter fields in Markdown

Validate the 15-digit IMEI check digit with the Luhn algorithm