Home / Thai Identifier & Phone Format Validator
Thai Identifier & Phone Format Validator
Check Thai citizen ID, 13-digit tax ID, or phone-number formats and append results without changing source values.
Drop files here or choose files from your device
Processing happens directly on your device. No file bytes are uploaded, and this tool uses no Cloudflare Container compute.
How to use Thai Identifier & Phone Format Validator in 3 steps
- Choose your file: Supports .xlsx, .csv, .tsv; Maximum 15 MiB; XLSX 2 MiB
- Review the preview or confirm processing: Processing happens directly on your device. No file bytes are uploaded, and this tool uses no Cloudflare Container compute.
- Get the result immediately: Download the processed file and open it in Microsoft Excel or Google Sheets
Why does this problem happen, and how does this tool fix it?
Thai identifiers imported from multiple systems may mix Thai digits, separators, spaces, or country-code phone formats. Long spreadsheet formulas are difficult to audit and can silently classify malformed values.
How it works and protects your data: Validation runs entirely in your browser and appends normalized, status, and reason columns. It performs supported format checks only: a passing result does not verify registry existence, ownership, allocation, or activation.
Frequently asked questions
Does a passing result prove that an identifier or phone number exists?
No. The tool checks supported formats locally and does not query an external registry, verify an owner, or confirm that a phone number is active.
Does personal data leave my device?
No. File bytes and cell values are read and processed only inside your browser.