Changelog

Notable changes, newest first.

2026-10-19 — P4: more tools and polish

New tools: Percentage, Age Calculator, Salary Converter, JSON to YAML, CSV Cleaner, Excel Date, URL Parser and Cron Parser (52 tools total).
CSV Cleaner fixes the usual data issues: Excel BOM, non-breaking spaces, blank and duplicate rows, and spreadsheet formula injection, reporting every change.
Unit Converter gained pressure, energy, power, force, angle, frequency and torque.
Reset-inputs button, Download CSV for any table, palette actions to reset/export/clear recents, and a closable shortcuts dialog with a focus trap.
Canonical domain moved to heydata.world.

Shareable result links: tool inputs are encoded in the URL, with a Copy link button.
Command palette actions: copy link, keyboard shortcuts, calm mode, install.
Keyboard shortcuts overlay (?) and a calm mode that freezes the storm.
QR codes are now generated locally — the last third-party data path removed.
Social cards (og:image) for the home page, every tool and every category.
About and Changelog pages, MIT licence, GitHub footer links, and llms.txt.

Split the app into app/core.js plus per-group tool modules.
New business tools: VAT, discount, loan amortisation, ROI, break-even, invoice total.
New data tools: CSV to JSON, CSV viewer, SQL formatter, regex tester, JWT decoder, Unix timestamp, text diff, hash suite, slugify, mock data.
Category landing pages with schema, linked from the sidebar and sitemap.