JSON and Data Tools
Choose a JSON or data tool for validation, format checking, querying, and table conversion. These tools help with quick data cleanup and developer workflows in the browser.
Choose the right tool
- Need to check JSON syntax? Use JSON Validator .
- Need to query JSON data? Use JSONPath Tester .
- Need to validate newline-delimited JSON? Use NDJSON Validator .
- Need to convert CSV to JSON? Use CSV to JSON Converter .
- Need to convert JSON to CSV? Use JSON to CSV Converter .
- Need to convert Excel to JSON? Use Excel to JSON Converter .
- Need an Excel workbook from CSV? Use CSV to Excel Converter .
- Need an Excel workbook from JSON? Use JSON to Excel Converter .
- Need to check config files? Use YAML Linter or TOML Linter .
- Need Markdown from a table? Use Table to Markdown Converter .
Tools
JSON Validator
Validate JSON syntax and format with detailed error messages
JSONPath Tester
Use this JSONPath tester to query JSON data online. Paste JSON, enter a JSONPath expression, and inspect the matched results.
NDJSON Validator
Validate NDJSON line by line, format newline-delimited JSON, and quickly find which line contains invalid JSON.
CSV to JSON Converter
Convert CSV data to JSON format with table preview
JSON to CSV Converter
Convert JSON data to CSV format with customizable delimiters and headers
Excel to JSON Converter
Convert Excel files (.xlsx, .xls) to JSON format with multi-sheet support
CSV to Excel Converter
Convert CSV, TSV, or pasted table data to an Excel .xlsx workbook
JSON to Excel Converter
Convert JSON arrays and objects to a formatted Excel .xlsx workbook
YAML Linter
Validate YAML syntax, format, and structure with detailed error reporting
TOML Validator
Use this TOML validator and linter to check TOML syntax online. Paste TOML text and find parsing errors quickly.
Table to Markdown Converter
Free online converter to turn pasted HTML, CSV/TSV, or line-broken tables into clean Markdown with preview.
Simple workflow
Paste data -> validate with JSON Validator -> query with JSONPath Tester -> convert with CSV to JSON Converter or Excel to JSON Converter -> copy the cleaned output.
JSON and data tools FAQ
What is the difference between JSON and NDJSON?
JSON is usually one complete object or array. NDJSON stores one JSON object per line, which is useful for logs, streaming data, and large datasets.
When should I use JSONPath?
Use JSONPath to find, filter, or extract specific values from nested JSON data using paths and conditions.
Can I convert Excel to JSON in the browser?
Yes. The Excel to JSON Converter reads spreadsheet files in the browser and creates JSON output you can preview, copy, or download.
What is the difference between YAML and TOML?
YAML is flexible and common in DevOps configuration, while TOML is stricter and often used for project manifests. Both benefit from syntax checking before deployment.