FormatShiftBatch Verify .SIG Signatures & Signed ZIP Archives Online
Reading time: 4 min•Accounting & Automation
Need to verify multiple files or a signed ZIP archive?
Drag & drop up to 50 signature files or a ZIP archive for instantaneous parallel validation and Excel report.
The Pain of Manual One-by-One Verification
When dealing with procurement, audits, or ERP exports, checking dozens of detached signature files one-by-one is tedious and error-prone.
How Batch Verification Works on FormatShift
Our tool processes arrays of signatures and archives directly in your browser memory with zero server uploads:
- Open our verifier /verify-sig.
- Drop a batch of files (up to 50) or a single ZIP archive.
- The tool unpacks archives, inspects certificates, and generates an interactive report.
- Click "Download Report (Excel / CSV)" to get an exportable audit spreadsheet.
Bulk Extraction of Embedded Documents
If the batch contains attached signatures with embedded PDF or XML payloads, the tool extracts all originals and bundles them into a clean ZIP archive with one click.
Frequently Asked Questions
What is the batch limit?
You can verify up to 50 files per batch or ZIP archives up to 100 MB. Completely free with no account required.
Is it safe to check confidential archives?
Yes. ZIP decompression and ASN.1 container parsing occur 100% locally in your browser memory.