Developer tools

Small helpers for your development workflow.

13 tools

Calculate a SHA-256 digest of UTF-8 text locally.

Calculate a 512-bit digest with the Web Crypto API.

Minify or format JavaScript, CSS, HTML and JSON with adjustable indentation.

Convert px, em, rem, pt, percentages and viewport units. Set font sizes and reference dimensions for accurate CSS length calculations.

Build regular expressions with visual rules, repetition controls and presets. Test matches and capture groups before copying your JavaScript regex.

Format SCSS with consistent indentation and readable nested selectors. Clean up variables, mixins and stylesheet blocks without compiling them.

Preview Markdown safely, export clean HTML or convert basic HTML into Markdown for writing and documentation.

Format SQL queries for MySQL, PostgreSQL, SQLite and SQL Server with readable indentation.

Calculate SHA-256, SHA-512 or SHA-1 file checksums locally to compare downloads and detect byte-level changes.

Build five-field cron expressions with presets and preview the next runs in your chosen time zone.

Convert a cURL request into editable HTTP fields and generate JavaScript Fetch or Python Requests code.

Design responsive Grid and Flexbox layouts with a live preview and copy-ready CSS.

Generate TypeScript types from JSON, including nested objects, arrays and optional properties.