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FileKit
12 tools

Data And Format Conversion Tools

Move structured data between JSON, CSV, XML, YAML, TOML and SQL without writing a script. These data and format conversion tools parse strictly, report errors clearly and never upload your records.

CSV to JSON Converter

Convert a CSV file into a JSON array using a real RFC 4180 parser that handles quoted commas, embedded newlines and escaped quotes correctly.

csvjson

CSV to Markdown Table Converter

Convert CSV into an aligned Markdown table in your browser, with left, center or right column alignment.

csvmd

CSV Viewer

View a CSV file as a sortable, searchable table in your browser, with row and column counts and no upload required.

csv

JSON Diff Checker

Compare two JSON documents in your browser and see exactly which paths were added, removed or changed.

json

JSON to CSV Converter

Convert a JSON array or object into a CSV file in your browser, with dot notation flattening for nested data and a choice of delimiter.

jsoncsv

JSON to SQL Converter

Generate a CREATE TABLE statement and INSERT statements from a JSON array in your browser, with a choice of SQL dialect.

jsonsql

JSON to TypeScript Converter

Infer TypeScript interfaces or type aliases from a JSON sample, with nested objects, arrays, unions and optional fields handled automatically.

jsonts

JSON to XML Converter

Convert JSON into well formed XML in your browser, with a configurable root element and array item name.

jsonxml

JSON to YAML Converter

Convert JSON to clean, readable YAML in your browser with control over indent width and key ordering.

jsonyaml

TSV to CSV Converter

Convert TSV to CSV, or CSV to TSV, in your browser with correct quoting and a choice of delimiter for each direction.

tsvcsvcsv

XML to JSON Converter

Convert XML to JSON in your browser using DOMParser, with an option to keep or drop XML attributes.

xmljson

YAML to JSON Converter

Convert YAML to JSON in your browser, with clear error positions when a document fails to parse.

yamlymljson

Why use browser based data and format conversion tools

Data lives in whichever format the system that produced it preferred, and it almost never matches the format the next system expects. A spreadsheet export needs to become an API payload. A configuration file needs to move from YAML to JSON. A database dump needs flattening into CSV for analysis. These data and format conversion tools handle those hops directly.

Correctness matters more than speed here, so every converter uses a real parser rather than a regular expression. Nested objects, quoted delimiters, escaped characters and type coercion are all handled explicitly, and when input is malformed the tool tells you which line broke rather than silently producing garbage.

Frequently asked questions

Yes. Every tool in this category is free with no account, no trial and no daily limit. The tools run as JavaScript inside your own browser, so there is no server cost to pass on and no reason to meter usage.

No. Files are read directly from your device into browser memory, processed locally and written back out as a download. Nothing is transmitted, nothing is logged and nothing is stored after you close the tab.

There is no limit imposed by us. The practical ceiling is your own device memory, because the file has to fit in the browser tab while it is being processed. Most machines handle files of several hundred megabytes without trouble.

Current versions of Chrome, Edge, Firefox and Safari on desktop and mobile are all supported. Where a specific tool depends on a capability that a browser has not shipped yet, that tool says so on its own page before you select a file.