FreeToolsBox is maintained as a focused developer-tool product. This page records meaningful quality, content, and safety improvements.
Added an installable offline shell with explicit sensitive-data cache boundaries, expanded Chinese guides and workflows, strengthened real-experience checks, and kept the focused tool, sitemap, noindex, and inventory rules intact.
Added API debugging, token inspection, and content cleanup workflow pages, promoted CSS Formatter and UUID Generator into the focused core surface, and connected guides to related workflows while keeping non-core inventory governed.
Added a dedicated browser-local workspace, safe local presets, an advertising policy, stronger accessibility checks, and stricter performance budget audits without expanding the noindex inventory surface.
Promoted Text Diff and Markdown Preview from noindex inventory into the focused core surface after adding stronger workflows, related concept guides, quality profiles, and sitemap-safe promotion checks.
Mapped legacy non-core tools into noindex workbench hubs, Labs, upgrade candidates, and hidden inventory rules so weak one-off pages do not dilute the focused tool directory or sitemap surface.
Added a privacy-safe quality intelligence layer for Core Web Vitals, client error capture, route health signals, live deployment checks, security.txt, and monthly quality reporting without collecting tool input or output.
Expanded the guide library to twelve focused English concept pages, added Chinese core guides, introduced security and editorial-policy pages, and added indexing, sitemap, noindex, content-depth, and trust-page audits.
Added copyable JSON tree paths, JWT claim signals, regex replacement preview, local file checksum drop zone, URL double-encoding diagnostics, password presets, and a browser-local workspace for favorites and recently used tools.
Added richer core-tool workflows: JSON structure preview, JWT verification checklist, regex highlight preview, hash digest compare, URL encoding mode comparison, and password passphrase mode.
Unified the public brand, upgraded trust pages, refreshed the Chinese entry, added update history, and strengthened accessibility and mobile performance fallbacks.
Added concept guides for Base64, JWT, URL encoding, and hashing, then connected them to the focused tool pages and data-handling documentation.
Kept the main directory centered on a small promoted set of mature developer tools while experimental utilities remain noindex, ad-free, and outside the main sitemap surface.
Improved warnings around production tokens, private keys, sensitive records, Base64, JWT verification, hashes, and generated passwords.