Question 1

Are the strings cryptographically secure?

Accepted Answer

Yes. Each character is selected using the browser's Web Crypto API (crypto.getRandomValues), a cryptographically secure random source, so the strings are suitable for tokens and keys.

Question 2

What does “exclude ambiguous characters” do?

Accepted Answer

It removes characters that are easy to confuse — 0 and O, and 1, l, and I — so the string is easier to read, type, and dictate without errors.

Question 3

How long can the string be?

Accepted Answer

Up to 256 characters for the random body, plus whatever prefix or suffix you add.

Question 4

Can I control the alphabet?

Accepted Answer

Yes. Mix uppercase, lowercase, numbers, and symbols freely. The live character-pool size shows how many distinct characters each position can use.

Question 5

Is anything uploaded?

Accepted Answer

No. Strings are generated entirely in your browser and never sent anywhere.

Question 6

What does the entropy meter mean?

Accepted Answer

Entropy measures how hard a string is to guess: length × log2(character-pool size), in bits. 128 bits or more is considered unguessable for secrets — a 24-character string from a 62-character alphanumeric pool carries about 143 bits.

Question 7

Can I generate many strings at once?

Accepted Answer

Yes — set 'How many' up to 100 and each string appears on its own line, each independently random. Copy them all or download the batch as a .txt file for seeding a database or spreadsheet.

Generate random strings

Generated random string