Why this tool is useful
Review an address-book export before migration or sharing while keeping names, phone numbers, email addresses, notes and organization details on the current device.
Local File Tools · runs locally
Private vCard and VCF Contact File Auditor
Inspect a saved vCard contact file for versions, duplicate email addresses and UIDs, missing names, invalid addresses, grouped properties, embedded photos and remote references without opening any contact URL or image.
Ready. Your working data stays in this browser.
Files and capture streams stay on this device. Processing uses browser APIs only; nothing is uploaded to YTSave, the media API or a proxy. No server copy is created, stored or left to delete. The file picker is cleared when processing starts, and disposable worker memory is destroyed after completion or cancellation. Preview and generated-output memory is released when you clear the tool or leave the page.
How it works
A bounded inert line parser unfolds vCard records, handles common 2.1, 3.0 and 4.0 parameters and quoted-printable text, and never resolves PHOTO or URL references.
Practical example
Export contacts as VCF, inspect duplicate normalized email addresses and missing display names, then correct invalid records before importing them into another address book.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.