Free online NBF to CSV converter

Older Nokia phones and Nokia PC Suite may store contacts and other handset data in an NBF backup, while spreadsheet and contact-management software usually accepts CSV. The conversion is therefore normally an extraction of contacts or another selected dataset, not a conversion of the complete backup into one table.

What the NBF format is

NBF is an older Nokia Backup File associated with Nokia PC Suite and its Content Copier utility. It was used with Nokia mobile phones, including Symbian and Series 40 models, and may contain contacts, calendar entries, notes, messages, settings, and other phone data.

An NBF file is a proprietary backup container rather than a spreadsheet. Its internal structure depends on the Nokia software and phone generation that created it, so renaming .nbf to .csv or opening it directly in Excel does not convert its records. Keep an untouched copy because an NBF may be the only complete backup of the handset.

What the CSV format is

CSV is plain text arranged as rows and columns. Each line normally represents a record, while commas, semicolons, tabs, or another delimiter separate fields. CSV is supported by Excel, LibreOffice Calc, databases, CRM systems, contact managers, and many import tools.

A contact CSV can contain fields such as name, telephone number, email address, company, notes, and postal address. CSV has no standard for backup metadata, relationships, folders, attachments, phone settings, or multiple record types, so it cannot preserve the complete structure or restore capability of an NBF file.

How to convert an NBF file

The most dependable workflow is NBF backup → contacts or vCards → CSV. The correct method depends on whether the original Nokia software, phone, or a compatible extractor is available.

1. Copy the original file, such as backup.nbf, to a separate working folder. Perform all recovery and extraction attempts on the copy.
2. Use the Nokia PC Suite or Nokia Suite release associated with the phone and backup when possible. Older releases may not read files created by another release, and current Nokia software does not generally replace these discontinued tools.
3. In PC Suite, open the backup or Content Copier restore function, select the NBF file, and restore only the required contact data to a compatible Nokia phone or available PC Suite contact store. Some installations can synchronize contacts with classic Microsoft Outlook instead of restoring them to the phone.
4. If the contacts are in Outlook, export them with File → Open & Export → Import/Export → Export to a file → Comma Separated Values. Select the correct Contacts folder, save contacts.csv, and complete the field mapping if Outlook requests it.
5. If PC Suite exports contacts only as vCards, save them as .vcf, import those vCards into a desktop contact manager that supports CSV export, and export the resulting contact folder as CSV. Check the destination program's field mapping before confirming the export.

Menu names vary between PC Suite versions. Restoration may require the original Nokia phone, a compatible USB or Bluetooth driver, and an older Windows environment. Avoid modified or untrusted installers for discontinued Nokia software.

Extracting data without the original phone

When Nokia software cannot open the backup, use a desktop utility that explicitly supports Nokia PC Suite NBF files and the relevant phone or PC Suite generation. Extract the contact records or export them as vCards, then convert or export those records to CSV. Utilities designed for other Nokia backup extensions, such as NBU, are not automatically compatible with NBF.

Archive tools can be used for inspection, but they are not a general conversion method. On a copy, a command such as 7z l backup.nbf can show whether the file has a readable archive structure; 7z x backup.nbf -oextracted can extract files if 7-Zip recognizes that structure. If the result contains vCards, import the .vcf files into a contact manager and export CSV. Renaming the extension or running a generic ZIP extraction command does not create usable contact rows, and many NBF files will not be readable as ordinary archives.

You can also use the free converter on 101convert.com without installing software when its input list accepts NBF and CSV is offered as the output. Confirm which data type it extracts before relying on the result; a converter may export contacts but omit messages, calendars, media, or settings. Do not upload a backup containing private data unless its handling is acceptable to you.

Quality and compatibility limits

• An NBF can contain several mobile-data categories, but one CSV normally represents only a selected category, such as contacts. Export messages, calendars, media, and settings separately when the Nokia software supports those exports.
• Multiple phone numbers, email addresses, groups, postal addresses, linked contacts, and custom fields may become separate columns, combined text, or omitted values during export.
• Select UTF-8 when exporting or importing CSV to preserve accented and non-Latin names. If Excel displays incorrect characters, use its data-import dialog and specify UTF-8 instead of opening the file by double-clicking it.
• Check the delimiter because regional settings may produce semicolon-delimited CSV rather than comma-delimited CSV. Select the matching delimiter in the destination application.
• Import telephone-number columns as text when possible. Spreadsheet software can remove leading zeros, convert long numbers to scientific notation, or reinterpret values as dates.
• Compare the exported row count and several records with the restored contacts, then check duplicate entries and empty fields. Keep the original NBF as the archival backup.