GUIDE
How to Repair a Corrupt VCF File
Repair begins with diagnosis. Validate a copy, understand which records are incomplete, and export only after you can explain the change.
Last reviewed
DIRECT ANSWER
What you should know
Repair begins with diagnosis. Validate a copy, understand which records are incomplete, and export only after you can explain the change.
Before you begin
- Keep an untouched copy of the source export.
- Work on a small sample before changing a complete address book.
- Review the downloaded file before importing it elsewhere.
Separate structural damage from unsupported fields
Missing BEGIN:VCARD or END:VCARD lines, broken line folding, and malformed properties can prevent parsing. Unknown X-properties may be valid but unsupported by a destination.
Repair with a change report
The repair workflow surfaces warnings and creates a new file. Review the count, versions, and representative cards after every repair pass.
- Validate the original copy.
- Choose only the repair actions you understand.
- Download the repaired VCF.
- Validate the repaired output and compare it with the source.
When repair cannot recover data
If bytes were truncated or characters were already replaced, the missing information cannot be reconstructed reliably. Use another export or source backup when possible.
Questions people ask
Does How to Repair a Corrupt VCF File change the original file?
No. The browser works with the selected copy and creates a separate download. Keep the original export as your rollback point.
What should I verify after How to Repair a Corrupt VCF File?
Compare counts and representative fields, validate the generated copy, and test a small import before processing a full address book.