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Password Strength Checker
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Slovenia IBAN Validator
Validates a Slovenian IBAN: the mod-97 checksum, the 19-character length and the structure, with the bank and branch together identified.
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In short
A Slovenian IBAN is exactly 19 characters: SI, two check digits, then 5 digits, then 8 digits, then 2 digits — so the 5 characters after the check digits are the bank and branch together — 26330 in the example — and the remaining 10 are the account number, 0012039086. Slovenia’s five digits carry the bank and its office as one number, then eight digits of account and two more digits, for a nineteen-character IBAN — the second shortest in the euro area after Belgium. The checksum is ISO 7064 MOD-97-10: move the first four characters to the end, turn each letter into its position in the alphabet plus nine, and read the result as one long number, which must leave remainder 1 when divided by 97. That catches every single-character mistake and almost every swap of two neighbouring characters, which is what it was designed for and why an IBAN is worth checking before you pay rather than after. What it cannot do is tell you the account exists, is open, or belongs to the person you think — a random string of the right shape passes about once in 97 tries, and no amount of arithmetic reaches into a bank. This page runs entirely in your browser, so the number you type is not sent anywhere.
How to use the Slovenia IBAN Validator
- Paste the Slovenian IBAN — spaces and dashes are fine.
- Read the three checks: mod-97, length and structure.
- If it fails, the page says which check failed and what that usually means.
About the Slovenia IBAN Validator
Checks a Slovenian IBAN three ways — checksum, length and structure — and says which of the three failed when one does, because they mean different things.
What people use it for
- Checking a Slovenian IBAN before sending money to it.
- Finding the bank and branch together inside an IBAN you have been given.
- Confirming a Slovenian number was typed or pasted correctly.
Details
| Length | 19 characters, always |
|---|---|
| Structure | 5!n8!n2!n after the check digits |
| In words | SI, 2 check digits, then 5 digits, then 8 digits, then 2 digits |
| Bank and branch together | 5 characters — 26330 in the example |
| Example | SI56 2633 0001 2039 086 |
| Check digits | Always between 02 and 98. 00, 01 and 99 cannot occur |
| Privacy | The arithmetic runs in your browser. Nothing you type is sent anywhere |
The maths behind it
This tool uses ISO 7064 MOD-97-10 — move the first four characters to the end, replace each letter with its position plus nine, and a valid IBAN leaves remainder 1 on division by 97. On top of that, Slovenian IBANs are exactly 19 characters and follow 5!n8!n2!n. Every intermediate value is shown on screen, so the result can be checked by hand.
Three checks, reported separately on purpose. A length error means a character is missing or extra, a structure error means a letter sits where a digit belongs, and a checksum failure with both of those right means a genuine typo inside the number — most often two neighbouring characters swapped.
Where this tool stops
It checks arithmetic and shape. It cannot tell you the account exists or who it belongs to, it does not look the bank up, and it does not verify any national check digits Slovenia may use inside its own account number — those are separate rules, computed differently, and passing mod-97 says nothing about them.
Frequently asked questions
How many characters is a Slovenian IBAN?
Exactly 19, with no exceptions. After the two check digits the structure is 5!n8!n2!n — 5 digits, then 8 digits, then 2 digits. A number of any other length is not a Slovenian IBAN, whatever else about it looks right.
How long is a Slovenian IBAN?
Nineteen characters. Only Belgium’s sixteen is shorter among euro-area countries.
Where is the bank code in a Slovenian IBAN?
The 5 characters after the check digits are the bank and branch together — 26330 in the example — and the remaining 10 are the account number, 0012039086.
Does a valid checksum mean the account exists?
No, and this is the thing worth taking away. Mod-97 proves the number is internally consistent — that it was probably typed correctly. It says nothing about whether the account is open, or whose it is. A random string of the right length passes about once in every 97 attempts. Only the bank can confirm the rest.
Is it safe to paste an IBAN here?
The checking happens in your browser and the number is never sent to a server — there is no request to make one. An IBAN is not a secret the way a card number is, since it is printed on every invoice you send, but it is still yours, and it does not leave your machine here.
Do I need an account to use the Slovenia IBAN Validator?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the tool.
Can you see what I put into this tool?
No. The Slovenia IBAN Validator runs entirely in your browser using JavaScript. Nothing is transmitted, logged or stored, which you can verify yourself in the Network tab of your browser's developer tools.
Can I check the maths myself?
It uses ISO 7064 MOD-97-10 — move the first four characters to the end, replace each letter with its position plus nine, and a valid IBAN leaves remainder 1 on division by 97. On top of that, Slovenian IBANs are exactly 19 characters and follow 5!n8!n2!n. The full working is printed under the result, so you can follow every step rather than trusting a black box.
What do people use the Slovenia IBAN Validator for most?
In practice it gets used for three things: checking a Slovenian IBAN before sending money to it. Finding the bank and branch together inside an IBAN you have been given. Confirming a Slovenian number was typed or pasted correctly. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Where does the Slovenia IBAN Validator stop being reliable?
It checks arithmetic and shape. It cannot tell you the account exists or who it belongs to, it does not look the bank up, and it does not verify any national check digits Slovenia may use inside its own account number — those are separate rules, computed differently, and passing mod-97 says nothing about them. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What are the key numbers for the Slovenia IBAN Validator?
Length is 19 characters, always. Structure is 5!n8!n2!n after the check digits. In words is SI, 2 check digits, then 5 digits, then 8 digits, then 2 digits. These are printed on the page itself, so you do not have to take them on trust.
Is there an app version?
Yes. The page is responsive and the tool works in Chrome, Safari, Firefox, Edge and Samsung Internet on both Android and iOS. There is no app to install and nothing to sign into.
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