Brazilian Boleto Decoder

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what is a boleto digitable line

What is a boleto digitable line

The digitable line is the 47 (or 48) digit sequence printed on a boleto, meant to be typed in when a barcode reader is not available. It is not a single arbitrary number: each section carries a specific meaning, and a few digits exist purely to catch typos.

The 6 pieces of the digitable line

In a 47-digit bank slip, the first 3 digits identify the issuing bank (COMPE code) and the 4th identifies the currency (9 for Real). Starting at the 5th digit is the free field, a 25-digit space each bank fills in its own way (usually with branch, account and the boleto's own tracking number), split into 3 blocks across the line, each followed by its own check digit.
After the 3 blocks comes the general check digit (which protects the entire barcode), then the due-date factor (4 digits, the due date encoded as a day count since a base date), and finally the boleto amount in cents, in the line's last 10 digits.
In this example (Bradesco, code 237, currency 9 = Real): field 1 is 237913579 with check digit 7, field 2 is 2468013579 with check digit 5, field 3 is 2468013579 with check digit 5, all three computed with a modulo-10 algorithm, while the general check digit, which protects the whole barcode line, is 1 and is computed with modulo 11 instead. The due-date factor 1520 corresponds to 2026-07-27 under the count in effect since 2022-05-22, and the last 10 digits (0000008990) represent R$89.90, always in cents, with no decimal separator.

Decoded example

Sample Bradesco slip

Input: 23791357972468013579524680135795115200000008990
Expected output: Bradesco, R$ 89,90

A synthetic, valid line, use the field above to see the due date and blocks.

Digit count

Input: 47 dígitos
Expected output: boleto bancário

A 48-digit line is a utility bill, not a bank slip.

Due-date factor

Input: Fator 1520
Expected output: 27/07/2026

The factor counts calendar days from a base date. Under the current count, in effect since 2022-05-22, the base date is 2022-05-29, so factor 1520 lands on 2026-07-27.

Full tool FAQ

Is the digitable line always 47 digits?

No. Bank slips (invoices, loans, subscriptions) have 47 digits. Utility bills, used by water, power and telecom providers and by government agencies for taxes and fines, have 48 digits and a different field layout. This tool automatically detects which of the two formats you pasted.

How does the tool figure out the issuing bank?

Why do two different due dates sometimes show up?

What does a mismatched check digit mean?

Can the tool decode the payee's CPF or CNPJ?

Why does a utility bill sometimes show no amount in reais?

Is it safe to paste a real boleto's digitable line here?

Is a due-date factor of 0000 an error?

Frequently asked questions

Is the digitable line the same as the barcode?

They carry the same underlying information in two representations. The barcode has 44 digits, with no per-field check digits. The digitable line reorganizes those 44 digits into blocks and adds 3 extra check digits, one per block, so manual typing can be checked.

Why is there a free field?

Because each bank runs its own billing system, with different formats for branch, account, portfolio and internal tracking numbers. FEBRABAN standardized the field's size (25 digits) but left its content up to each institution.

Why are there two different base dates for the due-date factor?

Because the due-date factor only has 4 digits, from 0 to 9999, counting calendar days from a base date. With the old base date, October 7, 1997, that count would hit its maximum around February 2025, so Febraban switched the base date to May 29, 2022 starting February 22, 2025, resetting the count to zero for boletos issued from then on.

Next steps

The 6 pieces of the digitable line

In a 47-digit bank slip, the first 3 digits identify the issuing bank (COMPE code) and the 4th identifies the currency (9 for Real). Starting at the 5th digit is the free field, a 25-digit space each bank fills in its own way (usually with branch, account and the boleto's own tracking number), split into 3 blocks across the line, each followed by its own check digit.

After the 3 blocks comes the general check digit (which protects the entire barcode), then the due-date factor (4 digits, the due date encoded as a day count since a base date), and finally the boleto amount in cents, in the line's last 10 digits.

In this example (Bradesco, code 237, currency 9 = Real): field 1 is 237913579 with check digit 7, field 2 is 2468013579 with check digit 5, field 3 is 2468013579 with check digit 5, all three computed with a modulo-10 algorithm, while the general check digit, which protects the whole barcode line, is 1 and is computed with modulo 11 instead. The due-date factor 1520 corresponds to 2026-07-27 under the count in effect since 2022-05-22, and the last 10 digits (0000008990) represent R$89.90, always in cents, with no decimal separator.

Decoded example

Sample Bradesco slip

Input: 23791357972468013579524680135795115200000008990
Expected output: Bradesco, R$ 89,90

A synthetic, valid line, use the field above to see the due date and blocks.

Digit count

Input: 47 dígitos
Expected output: boleto bancário

A 48-digit line is a utility bill, not a bank slip.

Due-date factor

Input: Fator 1520
Expected output: 27/07/2026

The factor counts calendar days from a base date. Under the current count, in effect since 2022-05-22, the base date is 2022-05-29, so factor 1520 lands on 2026-07-27.

Full tool FAQ

Is the digitable line always 47 digits?

How does the tool figure out the issuing bank?

Why do two different due dates sometimes show up?

What does a mismatched check digit mean?

Can the tool decode the payee's CPF or CNPJ?

Why does a utility bill sometimes show no amount in reais?

Is it safe to paste a real boleto's digitable line here?

Is a due-date factor of 0000 an error?

Frequently asked questions