interviewprep

Open a job posting, click the icon. Get 5 likely questions, STAR-format answer prompts, and a company research card.

A browser extension for Chrome, Firefox, and Edge. Manifest V3.

Why

Walking into an interview cold costs you the offer. Walking in with the wrong prep costs you a week. interviewprep reads the job posting on your active tab and turns it into a prep brief in about 12 seconds — questions tailored to the role, scaffolds telling you what to ground each answer in, plus a research card so you know who you're talking to before the call.

How it works

1. Open a job posting on any tab — LinkedIn, Indeed, Greenhouse, Lever, Workday, most career pages.
2. Click the interviewprep icon in your browser toolbar.
3. Click Generate prep brief →.
4. The extension reads the visible text of the active tab via chrome.scripting.executeScript, sends it to api.voiddo.com/v1/interviewprep/generate, and renders:
   • Detected role + company + posting age.
   • 5 likely interview questions with STAR-format answer scaffolds.
   • A company research card: stage, team, stack, leadership.

Pricing

• Free tier — 5 generations / month. No account required; quota tracked locally.
• Pro — $6.99 / month or $59.99 / year. 100 generations / month. Sign in via the upgrade page on the extension portal page.

Install

Public-store builds (recommended once submitted):

• Chrome: coming soon
• Firefox: coming soon
• Edge: coming soon

Sideload (now):

• Chrome / Edge: chrome://extensions → Developer mode → Load unpacked → pick chrome/.
• Firefox: about:debugging#/runtime/this-firefox → Load Temporary Add-on → pick firefox/manifest.json.

Development

interviewprep/
├── chrome/         # Chrome / Edge build (Manifest V3)
├── firefox/        # Firefox build (MV3 + browser_specific_settings)
├── edge/           # Edge build (identical to chrome/)
├── brand-spec.md   # Editorial personality lock
└── icon-placeholder.png

The extension is plain HTML / CSS / JS — no build step, no bundler, no minification. Open chrome/popup/popup.html to read.

Permissions

• activeTab — read the job posting text on your current tab when you explicitly click the icon.
• scripting — execute the text-extraction script on the active tab on click.
• storage — store an anonymous client-id (UUID) and the local free-quota counter so we can honor "5 / month" without an account.

No host_permissions, no content scripts, no background scraping, no remote code, no analytics. The Firefox manifest declares data_collection_permissions.required: ["none"].

Privacy

The text from your active tab is sent to api.voiddo.com/v1/interviewprep/generate for AI processing. We don't store it after the response is returned. We don't link it to your identity. Full policy: extensions.voiddo.com/interviewprep/privacy/.

CLI + library (@v0idd0/interviewprep on npm)

Power users who want to format briefs from their own AI stack, CI pipelines, or terminal workflow can install the standalone library:

npm install @v0idd0/interviewprep
# or, for one-off use:
npx @v0idd0/interviewprep < brief.json

The package exposes the same formatters that power the extension popup — given an already-generated brief object, it serializes to markdown / plain / json / readme. It does not call any AI — to generate a brief from a job posting, install the browser extension above.

const { formatBrief } = require('@v0idd0/interviewprep');

const brief = {
  role: 'Senior Frontend Engineer',
  org:  'Acme Corp',
  questions: [{ q: 'Why this team?', star: 'Tie their stack to your last shipped feature.' }],
  company: { summary: 'Series B SaaS', facts: { stage: 'Series B', team: '~80' } },
};

console.log(formatBrief(brief, 'markdown'));   // → markdown string
console.log(formatBrief(brief, 'readme'));     // → README-style export
console.log(formatBrief(brief, 'json'));       // → canonical JSON

CLI:

interviewprep < brief.json                    # markdown to stdout
interviewprep --file=brief.json -f readme     # readme export
cat brief.json | interviewprep -f json > out.json

Zero dependencies, MIT-licensed, free forever.

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License

MIT. See LICENSE.

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Built by vøiddo — a small studio shipping AI-flavoured products, free dev tools, Chrome extensions and weird browser games.