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Proofmark - Grammar & Spelling Checker

Chrome extension by CHPX · Productivity · Tools

  • Trader

A Chrome extension in Productivity · Tools with 1 users, barely installed.

Specific sites only: 2 match patterns.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
1
Rating
not rated yet
Users, last 2 days
+1
Version
1.0.1
Updated in the store
2026-10-06
Published
2026-10-06
Manifest
V3
Browser access
4 permissions, 2 site patterns

How it has moved

Users
+1 since 07.10
0-1 · 2 readings
2026-10-07: appeared in the store
  1. 2026-10-070appeared in the store
  2. 2026-10-081
Users
+1 since 07.10
0-1 · 2 readings
2026-10-07: appeared in the store
  1. 2026-10-070appeared in the store
  2. 2026-10-081

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 2 match patterns.

  • https://proofmark.chpx.app/*
  • https://plausible.io/*
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
  • Add items to the right-click menu contextMenus
Show the remaining 1
  • Store data in your browser storage

The full permission history for this extension

What changed recently

  1. Appeared in the store

The publisher

CHPX publishes 3 listings we track, 5 users between them.

  1. SessionSafe - Tab Session Saver & Backup CHPX · Productivity · Workflow · published 2026-10-02 4 users
  2. Skimkit - YouTube Summary & Transcript CHPX · Productivity · Tools · published 2026-10-07 audience not published

Like this one

Listings the catalog judges closest in what they say they do.

  1. Scribens: Grammar Checker and Writing Assistant Describes nearly the same job, with an established audience 20k users ★ 3.8
  2. Oops: Got Your Back - Grammar Checker Describes nearly the same job, smaller audience 6 users ★ 5.0
  3. Grammar Checker Lite Describes nearly the same job, smaller audience 17 users
  4. Wordeep Proofreading Describes nearly the same job, smaller audience 4k users ★ 4.7
  5. AI Grammar Corrector — Grammar Checker & AI Writing Assistant Describes nearly the same job, smaller audience 12 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.