How to use: IBAN Validator

Description

Validate an IBAN with MOD-97, check the national length and show the rearranged calculation.

• Validators & Checksums
• Because everything is computed client-side, IBAN Validator is safe to use with sensitive data such as API keys, tokens or private logs.

How to use

Using IBAN Validator takes three steps:

1. Paste your data into the input box (or load the example).
2. Configure the options to match your target format or scenario.
3. Copy, download or inspect the output — it updates live as you type.

Run

Examples

A German test IBAN. Spaces are ignored; the MOD-97 remainder must be 1.

Input

DE89 3704 0044 0532 0130 00

Output

DE89 3704 0044 0532 0130 00

Country: DE (expected length 22)
Check digits: 89
MOD-97 remainder: 1 → 1 ✓ VALID
Length: 22 ✓ matches the national IBAN length

Validation: move the first 4 characters to the end, replace each letter with A=10…Z=35, then the resulting number must be congruent to 1 modulo 97.

This output was produced by actually running the tool, not written by hand.

Use cases

Common situations where IBAN Validator helps:

• Validate an IBAN with MOD-97, check the national length and show the rearranged calculation.

Parameters

This tool has no options — it works on the input alone.

FAQ

Good to know

• Everything runs client-side, so extremely large inputs are limited by your browser tab’s memory rather than by a server upload limit.

Related tools

IBAN Validator → · Validators & Checksums →