Tool changelog · CIDR Workbench

1.0.1 · 24 August 2026

Made the homepage title and main heading explicitly describe its IPv4 and IPv6 CIDR calculation and subnet-planning purpose.

Established v1.0.0 as the stable semantic-version baseline for public releases.
Added family-specific edge-case guidance: IPv4 /31 and /32, or IPv6 /127 and /128, now appears in the middle summary card when its address family is selected.

Replaced the subnet dropdown and separate action buttons with a Split/Join mode toggle and directly actionable rows in the visual allocation tree.
Added keyboard, touch and screen-reader states to every current subnet, including explanations when a row cannot be split or joined.

Added manifest-driven production checks for canonical metadata, sitemap coverage, indexing directives, structured data, security headers, 404 behavior, HTTPS redirects and release parity.
Added the repeatable Search Console and sitemap-submission gate used by future utility launches.
Clarified that every whole-number IPv6 prefix from /0 through /128 is valid, with common-use guidance that does not restrict split or join operations.
Added complete /64 network capacity and compact large-number summaries while preserving exact IPv6 counts in details and exports.

Added full IPv6 visual planning with repeatable Split, valid sibling Join, Restore parent, selection and exact Markdown or JSON exports.
Replaced the address-family menu with accessible IPv4 and IPv6 cutout tabs, defaulting to IPv4 and clearing calculator state when switched.
Added family-specific clickable prefix examples and aligned the IPv4 and IPv6 controls to the top-left, with matching family colours.

Added exact browser-local IPv6 parsing and 128-bit range calculation for prefixes from /0 through /128.
Added RFC 5952 canonical output, a fully expanded verification form, and RFC 4291 embedded-IPv4 input support.
Added an accessible prefix/remaining-bit boundary and IPv6-specific explanations without broadcast, wildcard-mask or usable-host fields.
Documented /0, /64, RFC 6164 /127, and /128 boundaries while preserving the IPv4 planner.

Added browser-local visual subnetting with repeatable Split, valid sibling Join, Restore parent and Reset controls.
Added a vertically scrollable allocation tree that keeps every current CIDR visible, plus a subnet selector and one focused detail panel.
Added whole-plan Markdown and JSON clipboard exports, accessible state feedback and a documented 256-subnet safety cap.
Started with a blank calculator and kept range and binary details collapsed until requested.

Added the release value to every page footer and HTML metadata.
Added automatic, validation-gated Cloudflare Worker version deployment from main.