Convert

Browse Convert developer tools on RunTools.dev, with focused utilities you can open quickly for debugging, conversion, validation, and daily workflow tasks.

Convert

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Timestamp Converter

Convert Unix Timestamp to Date and vice versa.

Time Zone Converter

Convert date and time between time zones with daylight-saving awareness.

Date & Duration Calculator

See how many days remain until a date, how long has passed since, and the years and days between two dates with leap years handled.

QR Code Generator

Turn text or URLs into downloadable QR codes.

Convert JSON arrays into CSV, TSV, HTML, or XML.

YAML ↔ JSON Converter

Convert YAML data to JSON and vice-versa with ease.

Convert CSV into Markdown tables or JSON.

Convert XML rows into CSV, TSV, HTML, or JSON.

Number Base Converter

Convert numbers between binary, octal, decimal, hexadecimal, and any base from 2 to 36.

Convert length, weight, temperature, and volume units instantly.

Image Format Converter

Convert images between PNG, JPEG, WebP, and AVIF locally or in the cloud.

Roman Numeral Converter

Convert between Roman numerals and Arabic numbers from 1 to 3999 with a live symbol-by-symbol breakdown.

HTML to Markdown

Convert HTML into clean Markdown with lists, tables, links, and fenced code blocks preserved.

ENV to JSON Converter

Convert .env files to JSON and back, with quoting, comments and type parsing handled for you.