ContactLens

Browser-based contact lookup for CSV and vCard contact data.

Features

• Load contacts from CSV or VCF directly in the browser
• Parse vCard FN, N, and TEL fields
• Handle folded vCard lines and common telephone parameters
• Automatically detect CSV phone columns such as Phone 1 - Value
• Normalize Indian numbers in +91, 91, 0, and 10-digit formats
• Check one or thousands of numbers against the contact index
• Show matching contact names
• Detect numbers associated with multiple contacts
• Filter results
• Export lookup reports as CSV
• No backend, database, or external API
• Contact data stays in browser memory

Usage

1. Open the application.
2. Choose a CSV or VCF file, or drag it into the contact loader.
3. Paste one or more numbers into the lookup box.
4. Click Run lookup.
5. Filter or export the results as required.

Privacy

Do not commit personal contacts to this repository. Contact files are processed locally in the browser and are not sent to a server.