Some numbers look different but are made of exactly the same digits - 123 and 321, or 2041 and 4120. They are anagrams of each other, and they are the hardest kind of duplicate to spot by eye. This tool groups every number by a signature and pulls them out in one pass - handy for de-duplicating codes, vouchers and draw numbers.

Three matching modes:
· Same digits (any order) - the signature is the digits sorted ascending, so 2041, 4120 and 1024 all share the signature 0124 and count as one duplicate group;
· Reversed order - the signature is the smaller of the number and its reverse, so only genuine reverse pairs group together, e.g. 123 with 321, or 45 with 54;
· Exactly the same - a duplicate only when the digits match literally, i.e. ordinary de-duplication.

You can also decide how to treat leading zeros: with Ignore them, 012 and 12 belong to the same group.

Steps:
1. Paste the numbers into the box on the left - commas, spaces, newlines or any separator work (integers only);
2. Pick the Match by mode;
3. Choose how to treat leading zeros;
4. Choose what to output: list everything / only duplicates / only unique ones;
5. Pick the sort order (input order / numeric value / group);
6. Click Run. One result per line appears on the right, and the table below shows the digit signature, the group mates and the status (Duplicate / Unique) of every number.
Note: the Same group column lists the other numbers that are rearrangements of the current one so you can verify at a glance; when the same value appears several times it still belongs to a single group.