Data Conversion
10 toolsMove data between JSON, CSV, Excel, YAML, XML and Markdown — and repair JSON that will not parse.
Moving structured data between the formats different systems insist on: JSON, CSV, Excel, YAML, XML and Markdown, in both directions.
Start with the repair tool if something will not parse — most conversion failures are a trailing comma, a smart quote pasted from a document, or an unescaped character, and it is quicker to fix the file than to guess. Large files are handled in the browser, so there is no upload limit beyond your own memory.
JSON to CSV Converter
Turn a JSON array of objects into a spreadsheet-ready CSV file.
CSV to JSON Converter
Parse a CSV file into a clean, properly typed JSON array.
JSON to Excel Converter
Build a real .xlsx spreadsheet from JSON, with typed cells and a frozen header.
Excel to JSON Converter
Read an .xlsx workbook straight into JSON, one sheet at a time.
JSON to YAML Converter
Convert JSON into clean, readable YAML for config files and manifests.
YAML to JSON Converter
Parse YAML — anchors, aliases, blocks and all — into JSON.
JSON to XML Converter
Transform JSON into well-formed XML, with attributes and sensible element names.
XML to JSON Converter
Parse XML into a clean JSON structure, with attributes and repeated elements handled properly.
JSON to Markdown Table
Generate a Markdown table, bullet list or section list from JSON.
JSON Repair Tool
Fix broken JSON automatically — LLM output, hand-edited config and copied code.
How these tools work
Every one of these 10 tools runs entirely in your browser. There is no account to create, no file to upload and no daily limit, because the work happens on your own device rather than on a server — which also means there is nothing for us to log, cache or leak. Most of them keep working with the network off once the page has loaded.
Not finding what you need? Press ⌘K to search all 223 tools, or browse the other categories.