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Preflight — Catch what your prompt is missing

Chrome extension by Jesse Lu · Productivity · Tools

A Chrome extension in Productivity · Tools with 2 users, barely installed.

Specific sites only: 1 match pattern.

What the developer says, and 3 screenshots

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

Users
2 (the store no longer states an audience; this is the last figure it published)
Rating
not rated yet
Users, last 17 days
+2
Version
0.1.53
Updated in the store
2026-06-09
Published
2026-06-03
Manifest
V3
Browser access
2 permissions, 1 site pattern

How it has moved

Users
+2 since 01.09
0-2 · 5 readings
  1. 2026-09-010
  2. 2026-09-032
  3. 2026-09-052
  4. 2026-09-070
  5. 2026-09-172
Users
+2 since 01.09
0-2 · 5 readings
  1. 2026-09-010
  2. 2026-09-032
  3. 2026-09-052
  4. 2026-09-070
  5. 2026-09-172

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: 1 match pattern.

  • https://prompt-helper-api.vercel.app/*
  • Sign you in with a Google account identity
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

Jesse Lu.

Like this one

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

  1. AIChemy - Prompt Engineering Describes nearly the same job, smaller audience 3 users ★ 5.0
  2. PromptLint — AI Prompt Linter Describes nearly the same job, smaller audience 15 users
  3. FixThePrompt Describes nearly the same job, smaller audience 7 users
  4. Claude Code Analyzer Describes nearly the same job, smaller audience 57 users ★ 5.0
  5. Prompt Auditor – GPT Prompt Checker Describes nearly the same job, smaller audience 15 users ★ 5.0

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.

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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.