Random String Generator
Generate random strings locally with configurable length, character set and look-alike exclusion — great for test data and throwaway tokens.
>_ USAGE GUIDE
Configure the length, the character sets (uppercase, lowercase, digits, symbols), and any exclusions, then generate a whole batch of random strings in one click — the fast path to bulk test data, throwaway tokens, and sample IDs. Look-alike exclusion (0/O, 1/l/I) produces strings that survive being read aloud or copied by hand.
- Set the length: one length applies to all strings in the batch
- Pick the character sets: enable look-alike exclusion if a human will transcribe the results
- Generate in bulk: a whole list appears at once, ready to copy
The positioning differs from the Password Generator: that tool optimizes for strength (entropy evaluation, security scenarios), while this one optimizes for flexibility — arbitrary batch sizes and character-set combinations for producing twenty test accounts or a sheet of sample keys in one shot. Typical destinations: seeded test databases, sample keys for documentation, and temporary access codes for staging environments. Generation uses the browser's cryptographically secure random source, runs entirely locally, and uploads nothing.
>_ FAQ
Q1 · Can generated strings ever repeat within a batch?
Each string is generated independently, so duplicates are possible in principle and extremely unlikely in practice — the odds depend on alphabet size and length. Where uniqueness is a hard requirement, generate first and run an order-preserving dedupe with the Line Tools, or reach for the UUID Generator, whose 2^122 space makes collisions effectively impossible.
Q2 · Is a random token the same as a password, and which tool should I use?
Underneath, both are random strings — the difference is the strength requirement. Security credentials (API keys, passwords) deserve the Password Generator with generous entropy; test data and placeholder samples are what this tool is for, with bulk quantity and free-form alphabets. Do not generate production secrets with a test-data tool by habit — use the security-focused tool for anything that guards real access.
Q3 · Can random strings serve as order numbers?
Yes, with caveats. A random ID leaks no business volume — a genuine privacy benefit — but it carries no time information and uniqueness becomes your responsibility (enforce it with a database unique constraint). For order codes that must sort by time, the common pattern is timestamp plus random suffix, and this tool conveniently produces the random segment.
Q4 · Why does enabling look-alike exclusion lower the strength?
Excluding 0/O/1/l/I shrinks the alphabet from 62 to 57 characters, cutting combinations by roughly 8% at the same length. That is negligible — add one character to more than recover it. What you gain is human-legibility, which is invaluable whenever strings are dictated over a call or typed by hand.
Q5 · Is the output truly random?
It comes from the browser's cryptographically secure random source (CSPRNG), whose quality meets security requirements — nothing like the predictable pseudo-randomness of Math.random(). Everything happens locally: results never cross the network and are never stored.