What is the IBAN Validator?
ToolsPopper's IBAN Validator checks whether an International Bank Account Number has the correct structure, country prefix, and mod-97 checksum. Paste any IBAN with or without spaces and get an instant valid-or-invalid result — ideal for catching typos in payment forms, ERP imports, and fintech sandbox payloads.
Validation runs entirely in your browser using the standard ISO 13616 mod-97 algorithm. Your banking data never leaves your device, and ToolsPopper never logs the IBANs you check.
When to validate an IBAN
- Wire transfer prep — confirm checksum before sending international payments
- E-commerce checkout QA — test SEPA and cross-border payment fields in staging
- Data migration — batch-verify IBAN columns in spreadsheets before import
- Invoice review — spot formatting errors in supplier banking details
How IBAN validation works
The tool strips whitespace, verifies the two-letter country code and check digits, then rearranges the string and applies the mod-97 checksum test used worldwide. A passing result means the number is mathematically consistent with IBAN rules — it does not confirm the account is open, active, or belongs to the intended recipient.
How to check an IBAN
- Paste the full IBAN into the input field (spaces are optional).
- Click Validate to run the mod-97 and format checks.
- Review the result — valid structure or invalid with immediate feedback.
- Repeat for as many IBANs as you need with no daily limit.
ToolsPopper vs IBAN.com and similar checkers
- Unlimited free validation — IBAN.com limits bulk and API access; ToolsPopper never meters clicks
- No signup — validate immediately without creating an account
- 100% private — checksum math runs on your device, not a remote server
- Instant feedback — no page reload or queue for single IBAN checks
- Test-data friendly — validate sandbox IBANs alongside real ones without uploading to third parties