Make every application count.
CViper Light reads your CV against the job you want and tells you exactly what to change — on your own computer, with nothing to sign up for.
Windows build available now. Free, open source, no account, and no server of ours behind it. The installer is not in the Microsoft Store yet, so Windows may show a SmartScreen warning the first time you run it — choose “More info”, then “Run anyway”. macOS and Linux are not offered for now.
Private by design.
There is no CViper server. The app runs on your PC, talks directly to the AI you choose with your own key, and keeps everything else on your disk.
No account
Nothing to register, no password to forget, no emails from us. Install it and start.
Nothing comes to us
We have no server and no copy of your data. Your CV goes to the AI provider you choose — with your own key — or to a model running on your own PC, and nowhere else.
Your own AI key
Bring a key from the AI provider you choose and pay them directly; a typical CV check costs a few pence. Or run a model on your own PC for free. Your key is stored in Windows' own credential store.
Three steps to your first CV check.
Install CViper Light
Download the Windows installer from GitHub Releases — a Microsoft Store listing is on its way. It opens straight into a short welcome.
Add your AI key
Paste a key from the provider you choose, or point the app at a model running on your PC. The welcome screen shows where to get a key and what a check typically costs.
Drop in your CV and a job
Paste the job advert or its link. You get a match score, the skills you match, the ones you are missing, and what to change first.
Built by someone who has read a lot of CVs.
CViper Light comes from years of hiring in London finance. It does the four things that actually move an application forward, and nothing else.
Match score
See how well your CV fits the role before you apply, and which requirements you are missing.
What to change
A prioritised list of specific edits — the section, what is holding it back, and what to do about it. Nothing invented: it only works with what you give it.
Application tracker
A board of everything you have applied for, with a mark down the side of each card showing how long it has sat still.
UK job search
Search Adzuna and Reed inside the app with your own free keys — or open the same search on nine UK boards in your browser, no key needed.
Before you download.
Is it really free?
Yes. The app is free and there is no paid tier. The only cost is what your AI provider charges for the calls you make with your own key — typically a few pence for a CV check — or nothing at all with a local model.
Where do I get an AI key, and what does it cost?
From the provider you choose, under their API keys page. Today the app has a key screen for OpenAI (platform.openai.com/api-keys) and for Anthropic (console.anthropic.com/settings/keys); both bill your own account, and a typical CV check costs a few pence with either. The app tests the key before it saves it, keeps it in your computer's credential store, and never shows it back. Prefer no key at all? Install Ollama and the app uses a model on your own PC for free.
Is my CV safe?
It stays on your computer until you ask for an AI reading of it. Then the text goes from your PC straight to the provider whose key you added, under that provider's API terms — not through us. We never see it. Pick a model running on your own PC instead and it does not leave at all.
How do I download it?
On Windows, get the installer from GitHub Releases — the file ending in “-setup.exe” is the simplest. It is not in the Microsoft Store yet, so Windows may show a SmartScreen warning the first time; choose “More info”, then “Run anyway”. Every build is made in public by the repo's own release workflow, so you can see exactly what produced the file you are installing. macOS and Linux are not offered for now.
Does it make things up?
It is designed not to. It reads your CV and tells you how it compares with the advert — it does not write CV content for you, and it does not add skills or jobs you did not give it. Always read the result before you act on it.
Who built this?
One person — a product manager with years in London banking and finance hiring — as a side project. It is maintained in spare time; questions and bugs go through GitHub Issues.
Privacy, in one paragraph. CViper Light runs on your computer. We have no server, no accounts, and no copy of your data. Your CV, a pasted advert and your own AI key only ever go to the provider you choose, or to a model running on your own PC. Your job-board keys go only to Adzuna or Reed, and only when you search. This website sets no cookies. Read the full privacy policy.