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ConPDS · Resources

Container inspection tools

Three utilities for everyday inspection admin — ISO 6346 check digits, photo batch prep, and shipper deposit modelling. No account required.

These utilities exist because the small manual steps around container inspection — verifying a number scribbled on a gate slip, shrinking a phone photo set so it survives a mail server, putting a figure on deposit exposure before a budget meeting — are where errors and delays creep in long before anyone evaluates software. Each tool handles one of those steps on its own, free, with nothing to install and no data retained. They are the same validation and preparation logic that runs inside ConPDS Checker; here they run stand-alone for anyone who needs the result today.

Common situations

Not sure which tool you need? These guides start from what happened — a repair bill, an inbox full of photos, or a disputed handover.

Received a container repair bill?

Who pays, what evidence you need, and how to defend against contested damage charges.

Read the guide →

External contractor photos by email?

Checker Email Dropbox files third-party attachments into the same archive as app captures — no install for senders.

Read the guide →

Notes

Check digit — client-side only; nothing is transmitted.

Photo downscale & ZIP — up to 50 images, 20 MB per file; processed in memory, not stored.

ROI calculator — client-side only; raw inputs are not sent to ConPDS.

FAQ

Do I need an account? ▼
No. All tools are public. The check-digit calculator and shipper ROI model run in your browser. The photo downscale & ZIP tool processes uploads in memory and does not store files after download.
How do I validate a container number? ▼
Open the check-digit calculator. Enter 10 characters to compute the check digit, or 11 to validate. Example: CSQU305438 → CSQU3054383.
How are photos named in the ZIP? ▼
Files are saved as CONTAINER-01.jpg, CONTAINER-02.jpg, and so on inside a ZIP named after the container number you enter. See the photo downscale & ZIP tool.
Is my data stored? ▼
No. Browser tools keep all input local. The photo downscale & ZIP tool only holds uploads in memory for the duration of the request.

See also

ISO 6346 glossary

Owner codes, check digits, and related terms defined.

Read entry →

Full glossary

EIR, PTI, M&R, and other container documentation terms.

Browse glossary →