Bitcoin Address (Legacy)

Matches a legacy Bitcoin address — P2PKH (starting with 1) or P2SH (starting with 3), 25–34 Base58 characters.

✓ Crypto payment validation✓ Wallet address input✓ Transaction verification

Safe

Test String

2 matches

1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy

[…]Character class […]— Matches any single character listed in this set

11— '1' — literal character

33— '3' — literal character

[…]{25,34}Character class […]— Matches any single character listed in this set — repeated between 25 and 34 times · {25,34} — between 25 and 34 times

a-ka-k— a-k — range from 'a' to 'k'

m-zm-z— m-z — range from 'm' to 'z'

A-HA-H— A-H — range from 'A' to 'H'

J-NJ-N— J-N — range from 'J' to 'N'

P-ZP-Z— P-Z — range from 'P' to 'Z'

1-91-9— 1-9 — range from '1' to '9'

Pattern: 31 charsInput: 69 chars

100% client-side · private

✓ Valid Examples

1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy

✗ Invalid Examples

0BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
1BvBMSEYstWetq
1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2_extra

Usage & Integration

Validate Bitcoin Address (Legacy) natively in your backend or frontend without copying regex strings.

Node / Edge

import { validate } from '@regexto/validators';

validate('bitcoin-address', '...');

Python

from regexto_validators import validate

validate("bitcoin-address", "...")

Go

import "github.com/regex-to/validators-go"

valid, err := validators.Validate("bitcoin-address", "...")

PHP

use RegexTo\Validators\Validator;

Validator::validate('bitcoin-address', '...');

Rust

use regexto_validators::validate;

let is_valid = validate("bitcoin-address", "...").unwrap();