Changelog

Tool-first navigation and JSON comparison

• Moved tool discovery above the Lab section and removed review-specific status messaging from the public homepage.
• Added a local JSON structure comparison workflow with nested-path changes, a sample API-response pair, a copyable report, and input/output limits.
• Aligned JSON file size documentation with the enforced limit and expanded the JSON, JWT, and image guides with concrete troubleshooting workflows.
• Corrected dashboard PV/UV labels and chart scaling; added explicitly scoped success telemetry for JSON operations.
• Corrected nested main landmarks and added canonical-host redirection for unexpected hostnames in Apache.

Evidence-first content pass

• Added Z Tools Lab, which renders committed Base64, JSON, SHA-2, case-conversion, WCAG contrast, and PHP GD image results with their recorded environments and limitations.
• Moved first-party verification ahead of the generic tool directory on the homepage and linked core tools back to observable evidence.
• Replaced broad SEO-style explanations on JSON, Base64, Hash, QR, JWT, Color, and Image Compressor pages with implementation boundaries, reproducible cases, and product-specific limitations.
• Removed the Google advertising runtime from the review build; publisher association now uses the AdSense account meta tag plus ads.txt. No visible ad slots are enabled.
• Corrected stale SHA-2 timing values in the public hash guide so they match the committed benchmark result file.

Product-value redesign

• Repositioned Z Tools around privacy-first developer/creator workflows instead of a generic “tools for everyone” directory.
• Modernized the shared product shell and replaced personal attribution/public email with Z Tools branding and a server-side Contact Form.
• Added Contact messages to the existing /admin/stats.php dashboard; messages persist until manually deleted.
• Deepened core workflows: JSON sort/file loading, JWT time/security context, Base64 local files, QR SMS/error correction, password entropy, local file hashing, URL byte feedback, Markdown sanitization disclosure, case metrics, and arbitrary WCAG foreground/background checking.
• Clarified that Image Compressor uses temporary server processing while most other tools process locally.
• Added reproducible offline verification scripts/raw results. No public benchmark/stress endpoint was added.
• Rewrote About, FAQ, Privacy, and Terms around actual code behavior. This entry does not claim AdSense approval.

Developer tool expansion

Added Hash, URL, Case, JWT, and Color tools plus their supporting technical guides.

Markdown workflow improvements

Expanded the Markdown conversion/export workflow and documentation around GFM and sanitized output.