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CIDR Desk

Productivity

CIDR Desk

Coming soon

Calculate IPv4 network, mask, and host ranges from a CIDR locally. Pro saves presets, history, and ExtHub sync.

Coming soon

This extension is in the final stage of development and will be available soon.

Screenshots

CIDR Desk

Hover to inspect at real size. On a phone, swipe.

Free vs Pro

See what stays free in your browser and what Pro unlocks.

Free

Included with the Chrome extension

  • Works entirely in your browser
  • No account required for core free use inside the extension UI
  • Local-first workflow

Pro

Unlocked with an ExtHub subscription

  • Named presets and a 50-item history inside CIDR Desk
  • Remember the last setup per website when the page allows it
  • Cloud sync plus the full archive on exthub.app

Why upgrade to Pro

  • Stop re-entering the same values on every visit
  • Restore presets after you switch machines
  • Pay only for the extension you actually use

About

CIDR Desk helps you get work done without sending your data to a backend for the tool itself. Unlock Pro on ExtHub with a monthly or yearly subscription.

Box Trace

Productivity

Hover elements to inspect content, padding, border, and margin box sizes. Pro remembers this site, presets, and ExtHub sync.

Layout Grid

Coming soon

Debug page layout with depth outlines, flex/grid accents, and a configurable column overlay. Pro remembers this site, presets, an...

Link Sweep

Productivity

Scan page links for broken URLs — filters, concurrent checks, export, and on-page highlight. Pro saves reports, export, and ExtHu...