Convert data between JSON, CSV, Markdown, SQL & TypeScript — instantly
Paste messy output straight from ChatGPT or Claude — JSONSheet fixes and converts it in one step. Everything runs locally in your browser: your data never leaves your device.
Browse all 22 toolsAll tools
JSON → CSV
JSON to CSV Converter
CSV → JSONCSV → JSON
CSV to JSON Converter
JSON → MARKDOWNJSON → Markdown
JSON to Markdown Table Converter
MARKDOWN → CSVMarkdown → CSV
Markdown Table to CSV Converter
CSV → MARKDOWNCSV → Markdown
CSV to Markdown Table Converter
JSON → TSJSON → TypeScript
JSON to TypeScript Interface Generator
CSV → SQLCSV → SQL
CSV to SQL INSERT Statements Generator
JSON → SQLJSON → SQL
JSON to SQL INSERT Generator
JSON → JSONJSON Formatter
JSON Formatter & Validator
TSV → JSONTSV → JSON
TSV to JSON Converter
CSV → CSVCSV Dedupe
Remove Duplicate Rows from CSV Online
JSON → YAMLJSON → YAML
JSON to YAML Converter
YAML → JSONYAML → JSON
YAML to JSON Converter
JSON → JSONFlatten JSON
Flatten Nested JSON Online (and Unflatten)
TEXT → TEXTJSON Escape
JSON Escape / Unescape String Online
CSV → HTMLCSV → HTML
CSV to HTML Table Converter Online
JSON → TEXTJSON → Query
JSON to URL Query String Converter
CSV → CSVCSV Transpose
Transpose CSV Online
JSON → XMLJSON → XML
JSON to XML Converter Online
JSON → JSONLJSON → JSONL
JSON to JSONL (JSON Lines) Converter
TEXT → JSONURL Params → JSON
URL Query String to JSON Converter
TEXT → TEXTBase64 Text
Base64 Encode / Decode Text Online
Why JSONSheet
🔒 Private by design
Every conversion runs in your browser with plain JavaScript. Nothing is uploaded, stored or logged — safe for customer data, internal exports and everything sensitive.
🤖 AI-ready input
Paste JSON wrapped in markdown fences or preceded by prose from ChatGPT / Claude — the tool cleans it automatically before converting.
⚡ Instant & unlimited
No signup, no queues, no file-size games. Results update as you type, with copy and one-click download.