NanaBoison Utilities
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FREE DEVELOPER TOOLS

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About NanaBoison Utilities

NanaBoison Utilities is a small, focused developer toolbox — a collection of everyday converters and generators that run entirely in your browser. There's nothing to install and nothing to sign up for.

Every tool works client-side: your files and text never leave your device. Paste, drop, convert, and copy the result. That's it.

FastEverything runs locally, so results are instant.
PrivateYour data is processed in the browser and never uploaded.
No sign-upOpen a tool and start working — no account needed.
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CSV to JSON

Convert CSV files into structured JSON.

Input CSV
Drop CSV here
or click to choose a file
JSON Output

JSON to CSV

Convert JSON data into spreadsheet-ready CSV.

Input JSON
 Drop a .json file or click to choose
CSV Output

JSON Lint & Beautify

Validate and format your JSON with perfect indentation.

Input JSON
Beautified JSON

JSON to String / String to JSON

Convert between JSON and escaped string literals.

Input
Output

JSON Compare

Compare two JSON documents and see exactly what changed.

Original (left)
Modified (right)
Object key order is always ignored.
Differences

Paste two JSON documents and click Compare.

JSON Type Inspector

See the data type of every field and generate TypeScript types.

Input JSON
Fields missing from some array items become optional (?).

Delimiter Replacer

Split text on one delimiter and join it back with another.

Input Text
Output Text
Tip: type \n for a new line and \t for a tab.

QR Code Generator

Generate QR codes for any text or URL.

Text or URL
Preview

Your QR code will appear here

Markdown Live Preview

Write Markdown and see the live HTML preview.

Markdown Editor
Live Preview