Category · 4 tools
Data & Conversion tools
Data rarely arrives in the shape you need. These converters translate between the formats teams actually exchange — spreadsheet exports, API payloads and configuration files — while keeping types and column order predictable.
CSV to JSON Converter
Convert CSV data to JSON with proper quote handling, delimiter choice and type inference.
JSON to CSV Converter
Convert an array of JSON objects (or a single object) into a properly quoted CSV file.
Number Base Converter
Convert integers between binary, octal, decimal, hex and any base 2-36, exactly, using BigInt.
YAML to JSON Converter
Convert YAML to JSON (or JSON back to YAML) with a friendly parser and configurable indent.
Questions about data & conversion tools
Are the data & conversion tools free to use?
Yes. All 4 tools in this category are free, need no account and have no usage limits. ToolzKit is funded by keeping the site cheap to run, not by gating features.
Does my data get uploaded anywhere?
Every tool in this category runs its processing in your browser using ordinary JavaScript. Your input is not sent to a server, and it is not written to storage when you leave the page.
Can I use these tools on a phone?
Yes. The layouts adapt to narrow screens, editors stack vertically instead of side by side, and copy buttons stay reachable without horizontal scrolling.
How do I find a tool quickly?
Press the forward slash key, or Ctrl+K on Windows and Cmd+K on macOS, to open the command palette from any page. Type a few letters and press Enter.
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Or see every tool across all 12 categories.