1. What does this tool do
This free online contact manager lets you import, search, view, edit, and export contacts. Use it for contact list, import contacts, or export contacts in CSV or JSON without sending data to the cloud. Support for CSV and JSON import; data stays in your browser—no account, no server upload. Ideal for merge lists, format change (CSV ↔ JSON), backup, or managing contacts without signing up anywhere.
2. How to use it
Quick start: Import a CSV or JSON file (map columns if asked), search and click a contact to view or edit, then export to CSV or JSON for backup or use in another app.
- Import — Choose CSV or JSON and select a file. Map columns to fields (name, email, phone, etc.) if the tool asks. Import loads contacts into the tool’s list.
- Search and view — Search by name, email, or other fields. Click a contact to view or edit details.
- Edit or delete — Update fields or remove contacts. Changes are saved in the browser (e.g. localStorage or IndexedDB).
- Export — Export the current list to CSV or JSON. Use the file for backup or to import into another app.
3. How it works
Imported files are parsed (CSV or JSON) and stored in the browser (e.g. in memory and then localStorage or IndexedDB). Search and filter run on that local data. Export serializes the current list to CSV or JSON and triggers a download. No data is sent to a server; all processing is client-side in your browser. No data is sent to any server.
4. Use cases & examples
- Merge lists — Import several CSV exports, clean duplicates (if the tool supports it), and export one list.
- Format change — Import CSV from one app and export JSON (or vice versa) for another.
- Backup — Export contacts to a file for safekeeping.
- No account — Manage a contact list without signing up anywhere; data stays in your browser.
Example
- Import contacts.csv with columns Name, Email, Phone → list of contacts. Edit one, delete another, export to contacts_backup.json.
5. Limitations & known constraints
- Browser storage — Data is tied to the browser and device. Clearing site data removes contacts unless you’ve exported a backup.
- Size — Very large lists (e.g. tens of thousands) may slow the tool or hit storage limits.
- Format — Import expects the CSV/JSON shape the tool documents; non-standard columns may be ignored or need mapping.
- No sync — There is no sync with phone or cloud; use export/import to move data.