Converters tools
Converters
Three different jobs sit in this category: moving data between CSV, JSON, XML and Markdown; converting units, dates and time zones; and turning a value into something scannable. All of it happens on your machine rather than on someone's server.
Every converters tool
Barcode Generator
Create Code 128, EAN, UPC, ISBN and ten other 1D barcodes, ready to print.
Open toolQR Code Generator
Create custom QR codes for links, WiFi, contacts and payments, with a real scan check.
Open toolTime Zone Converter
Convert and compare times across cities, with DST and meeting planning.
Open toolAge Calculator
Work out an exact age in years, months and days from a birth date.
Open toolCSV to JSON
Turn spreadsheet exports into clean, typed JSON records.
Open toolMarkdown to HTML Converter
Convert Markdown to clean, sanitized HTML with a live rendered preview.
Open toolUnit Converter
Convert length, weight, temperature, area, volume, speed, time and data.
Open toolXML to JSON
Turn XML into clean JSON, with attributes, arrays and namespaces handled.
Open toolJSON to XML
Convert JSON into well-formed XML with custom roots, arrays and attributes.
Open toolJSON to CSV
Flatten arrays of objects into a spreadsheet-ready CSV file.
Open tool
Data format conversions
CSV to JSON produces typed records rather than strings for everything, which is where most CSV imports go wrong. JSON to CSV flattens arrays of objects into something a spreadsheet opens. The XML pair handles the awkward parts explicitly: attributes, repeated elements that have to become arrays, namespaces, and choosing a root element.
These round-trips are lossy in known places — CSV carries no types, XML has attributes JSON has no slot for — and each tool shows you what it decided rather than deciding quietly.
Units, dates and time zones
- Length, weight, temperature, area, volume, speed, time and digital storage, across metric, imperial and binary units.
- Time zone comparison with daylight saving applied, for finding a slot that works in three offices.
- Exact age in years, months and days — the form-filling answer rather than an approximation.
Turning a value into something scannable
The QR generator builds codes for links, WiFi credentials, contact cards and payments, and verifies the result against a real decode before you print it. The barcode generator covers fourteen 1D symbologies including Code 128, EAN-13, UPC, ITF, ISBN and ISSN, at print resolution.