Metric ConverterMetricConverter
Changelog

Product Updates

Track every improvement we make to Metric Converter

All notable changes to Metric Converter are documented here. This page is rendered at /{locale}/updates/ for public visibility.

v0.8.0 — 2026-07-24

Conversion Correctness

  • Corrected unit-page formulas so displayed results, reference tables, and inverse conversions use the same unit definitions
  • Centralized temperature conversions and added verified Rankine and Réaumur support
  • Expanded the published catalog to 179 units, 13 categories, and 1,132 unit-conversion pairs
  • Verified every published file converter with a real browser fixture: 93 of 93 conversions produced readable output
  • Fixed HEIC-to-PDF and aligned every file page with the capabilities its browser engine actually provides

URLs, Search, and Error Handling

  • Restored high-value historical unit URLs only when the requested unit and locale were unambiguous
  • Added 1,879 exact, one-hop redirects and preserved query strings
  • Kept ambiguous or unsupported historical URLs as real 404 responses instead of guessing or redirecting visitors to unrelated pages
  • Excluded 404 and utility pages from advertising and search indexing

Privacy, Advertising, and Analytics

  • Added clear Accept and Reject privacy choices and a persistent control for changing the decision
  • Prevented Google Analytics and AdSense requests before consent or after rejection
  • Removed filenames, file contents, exact file sizes, and raw errors from conversion analytics
  • Updated privacy disclosures to describe browser-local conversion, Google services, and Cloudflare accurately

Reliability and Public Information

  • Made the root URL, canonical host, service-worker updates, and asset caching deterministic
  • Replaced outdated product totals and absolute capability claims with values derived from the published registries
  • Confirmed 31 file-format guides across all 9 supported languages
  • Added exhaustive conversion, routing, cache, consent, public-claim, and generated-page checks for future releases

v0.7.0 — 2026-03-06

Domain & Branding

  • Production deployment on Cloudflare Pages with custom domain metric-converter.com
  • Replaced all legacy "OmniWiki" branding with "Wiki"
  • Updated contact email to support@metric-converter.com across all pages
  • Legal pages (Privacy Policy, Terms of Service) updated to 2026-03-06

Bug Fixes

  • Legal & contact pages now show English fallback for ko/pt/fr/de/ru (previously blank)
  • Removed stale support@sagasu.art references from all pages, API docs, and machine-readable files

Wiki Content

  • 31 format guides × 9 languages = 288 wiki pages

v0.6.0 — 2026-02-14

New Format Support

  • HEIC/HEIF image conversion (iPhone photos to JPG/PNG/WebP)
  • Audio conversion via FFmpeg.wasm: MP3, WAV, OGG, AAC, FLAC, M4A, WMA, AIFF (14 conversion pairs)
  • Image to PDF conversion via jsPDF (all image formats to PDF)
  • 49 file conversions total, 18 wiki pages

UI/UX Improvements

  • Dark mode lockdown: single cohesive dark theme, removed all light mode artifacts
  • Removed all emoji from UI and generated content
  • Language switcher now stays on current page instead of redirecting to homepage
  • Download button triggers real file save (fixes iOS Safari opening files in browser)
  • PDF output page size matches image exactly (no whitespace)
  • Homepage intro restructured, conversion counter added

SEO and Content

  • 200 unit conversion SEO pairs across 13 categories
  • Content depth average 800+ words per page
  • AI crawler files and Google Analytics integrated

Technical

  • Content architecture refactored, all content externalized to JSON
  • 3 new unit categories: digital-storage, angle, fuel-economy
  • Total: 118 units, 1227 pages

v0.5.3 — 2026-02-13

🏗️ Page Structure & Content Enrichment

  • Unit pages: Added Breadcrumb navigation, Value Props (4-card grid), BottomCTA, HowTo JSON-LD
  • Homepage: Introduction paragraph + 5 FAQ accordions
  • Unit Hub: Introduction paragraph + 5 FAQ accordions
  • Category Hubs: Per-category descriptions (10 categories) + cross-category navigation
  • Wiki pages: Expanded from ~40 words to 285-503 words per format
    • History, Technical Specs, Use Cases, Format Comparisons, FAQ
    • 11 formats: JPG, PNG, WebP, GIF, BMP, AVIF, SVG, ICO, TIFF, PDF, DOCX
  • 52 new i18n keys for unit page structure × 4 languages
  • ~160 new i18n keys for Hub content × 4 languages

v0.5.2 — 2026-02-13

📝 Content Depth 3.5x Expansion

  • SEO article content: 122 → 450 words per page (English average)
  • New sections per page: Category Context, Common Mistakes, Pro Tips
  • 10 category-specific context paragraphs × 4 languages
  • 30 unique "common mistakes" descriptions (3 per category × 10 categories)
  • Quick reference values with computed conversions
  • Real-world examples integrated into article body
  • Zero English leakage on non-English pages (i18n labels fixed)

v0.5.1 — 2026-02-13

🌍 Real-World Examples — 365 Life Scenarios

  • 86 conversion pairs × 3-5 real-world examples each = 365 scenarios
  • Travel: airline luggage limits (23kg/32kg), liquid restrictions (100ml), body temperature screening
  • Cooking: oil bottles (5L), beer packs (330ml×6), US recipe cups/tbsp
  • Fitness: body weight (kg/lb), running distances (km/miles), pool lengths
  • Real estate: room sizes (m²/ft²), renovation measurements
  • Automotive: tire pressure (bar/psi), fuel tanks, speed limits
  • All examples with 4-language descriptions (en/zh/ja/es)
  • Pre-computed conversion results for instant display

v0.5.0 — 2026-02-12

🌐 Domain Launch & Full Site Audit

  • Custom domain: Deployed to metric-converter.com
  • Language selector: Root page language chooser (no auto-redirect), nav bar globe dropdown
  • Mobile responsive: Hamburger menu, vertical unit converter layout on small screens, touch targets ≥ 44px
  • Copy to clipboard: Result field copy button with full-precision raw value
  • 96 units audited: NIST SP 811 naming (Degree Celsius, Millimeter of Mercury, etc.)
  • FAQ singular/plural fix: All 86 conversion pairs × en/es corrected ("1 foot" not "1 feet")
  • i18n quality: Japanese copyright translated, Chinese naming fixes (吨, 间)
  • SEO fixes: hreflang deduplication, JSON-LD (WebSite + Organization), /convert/ hub page, root page meta tags
  • Legacy migration: All old pages → locale redirects, zero non-locale pages remain
  • New pages: /convert/ index hub (4 langs), /wiki/ locale pages (44 pages)
  • 404 page: Custom not-found page with navigation
  • Favicon + OG image: Branded assets for social sharing
  • Total: 651 pages across 4 languages
  • 5 full audits completed: Unit names, mobile UI, i18n quality, SEO technical, landing page structure

v0.4.0 — 2026-02-12

🔢 Unit Converter Launch — 76 Conversion Pairs

  • New product line: unit conversions alongside file conversions
  • 10 categories: Length, Mass, Temperature, Volume, Area, Speed, Energy, Pressure, Power, Time
  • 85 units with NIST SP 811 exact conversion factors
  • 76 popular conversion pairs × 4 languages = 304 conversion pages
  • Interactive UnitConverter component with real-time calculation
  • Reference conversion tables (12 rows per pair)
  • Temperature: hardcoded non-linear formulas (°C/°F/K)
  • Category hub pages (10 × 4 langs = 40 pages)
  • Main unit hub page (4 langs)
  • JSON-LD: WebPage + BreadcrumbList + FAQPage per page
  • NIST Exact badge for mathematically exact conversions
  • Total site pages: 191 → 539 pages
  • 4966 unit tests passing (NIST exact values + round-trip)

v0.3.0 — 2026-02-12

🆕 6 New Image Formats

  • Added GIF, BMP, AVIF, SVG, ICO, TIFF as input formats
  • All new formats convert to JPG, PNG, WebP, and PDF
  • Total conversion pairs: 11 → 35
  • Total pages: 44 → 140 (across 4 languages)

🎨 Landing Page Redesign

  • Upgraded from 7 to 12 sections per conversion page
  • New: Before/After conversion preview
  • New: Feature Showcase with indigo gradient brand section
  • New: Bottom CTA with scroll-to-converter anchor
  • New: "More Conversion Tools" grid with all 35 pairs
  • Emotional hero titles in 4 languages
  • 4 value prop icons: 🔒 Privacy / ⚡ Speed / 📴 Offline / 🎯 Quality
  • WebPage JSON-LD schema (5 total schemas per page)

v0.2.1 — 2026-02-11

🔍 SEO Deep Optimization

  • FAQ section: 5 Q&A per conversion pair × 4 languages + FAQPage JSON-LD
  • Cross-links: "Same source" + "Same target" converter navigation
  • Article expanded: 129 → 389 words (6 H3 sections)
  • Format comparison table with technical specs
  • HowToSteps visual 3-step cards
  • Visual polish: styled tables, card grids, tip boxes, numbered steps

📊 Competitive Analysis

  • Analyzed Canva, Convertio, FreeConvert, CloudConvert, Online-Convert
  • Documented 3-tier SEO funnel architecture from Canva templates

v0.2.0 — 2026-02-10

🚀 Sprint 1 Complete

  • Core image conversion engine (Canvas API)
  • Web Worker isolation for non-blocking conversion
  • Dropzone component with 5-state flow
  • SEO matrix: 11 conversion pairs × 4 languages = 44 pages
  • Full i18n system: 50+ translation keys, zero English leakage
  • JSON-LD: SoftwareApplication + HowTo + BreadcrumbList per page
  • hreflang: 5 groups (en/zh/ja/es + x-default)
  • Deployed to Cloudflare Pages: metric-converter.pages.dev

🏗️ Architecture

  • Monorepo: apps/web (Astro) + packages/converter-core + packages/seo-matrix
  • Client-side only: zero server processing, 100% browser-based
  • Cloudflare Pages free tier deployment

v0.1.0 — 2026-02-09

🌱 Project Initialization

  • Astro + React + Tailwind CSS setup
  • Cloudflare Pages adapter
  • Basic project structure and documentation

This changelog is part of Metric Converter's commitment to transparency. For technical details, see our GitHub repository.

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