VAT Checker API Helper
Validate EU/UK VAT number format locally and generate clean VAT Checker API request payloads (JSON, cURL, JS). No network calls—fast offline prep for your VAT validation API.
How to use
Use this to catch formatting problems before calling a real VAT verification API.
- Paste one VAT number per line (or comma-separated).
- Select Country to force a prefix, or keep Auto to detect from the input.
- Click Validate format to get a JSON report, or Generate API payload to get request-ready payload + snippets.
Related tools: VAT Checker UK (GB/XI), Online JSON Converter, Base64 Format Checker.
FAQ
Does this VAT checker API tool verify if a VAT number is active?
No. It only validates structure/format offline; active/registered status requires an external service (often VIES-backed) via your own API.
What input formats does it accept?
Paste VAT numbers with or without spaces/dashes, one per line or comma-separated; the tool normalizes to uppercase and removes separators.
Can it auto-detect the country code?
Yes—if the VAT includes a known two-letter prefix (e.g., DE, FR, NL). If not, choose a country to force a prefix.
Does it support UK VAT numbers?
It includes basic GB/XI format checks, but for UK-specific rules and deeper validation use the dedicated VAT Checker UK tool.
Why does Greece use EL instead of GR?
VIES commonly uses EL for Greece; this tool normalizes GR to EL for consistency.
Can I generate a payload for my own VAT validation endpoint?
Yes. Use “API payload” or “Payload + code snippets” to get a JSON body and ready-to-edit cURL/JS templates.
Is checksum validation included?
No. Different countries have different checksum rules; this tool focuses on fast format validation and clean request building.
Continue your workflow
Browse related tools by task. Use the improved core tools for a consistent workspace with file import, downloads and clear validation errors.