What the random string generator does
This tool builds random strings out of exactly the characters you choose. Set a length, pick which character groups to mix in, and it spits out one or many strings at once. It is handy for developers who need API keys, test tokens, session IDs, or throwaway passwords, and for anyone making unique codes, coupon strings, or random sample data for a spreadsheet.
Because the strings are assembled right in your browser, you get a fresh batch the instant you click, and nothing about them ever touches a server.
How to use it
- Set Length to the number of characters you want per string (anywhere from 1 to 256).
- Set How many to choose how many strings to create in one go (up to 500, each printed on its own line).
- Tick the character sets you want in the mix: A-Z for uppercase, a-z for lowercase, 0-9 for digits, and Symbols for punctuation like !@#$%. Leave at least one checked.
- Click Generate.
- Copy the output and paste it wherever you need it.
Want only letters and numbers? Keep the three letter and digit boxes ticked and leave Symbols off. Need a hard-to-guess token? Switch every box on and bump the length up.
Why generate strings here
It is quick: results appear the moment you press Generate, with no page reload and no waiting. It is private, since the strings are created on your device and are never uploaded, logged, or shared. And it is free, with no account and no cap on how often you use it. The tool works the same on a phone, tablet, or laptop, so you can grab a random string from wherever you happen to be working.
Tip: generating a big batch and need them one per row in Excel or a CSV? Each string already lands on its own line, so a single copy and paste drops them straight into a column.
Frequently asked questions
- Which characters can I include in the random string?
- You pick the pool with four checkboxes: uppercase A-Z, lowercase a-z, digits 0-9, and symbols (!@#$%^&*()-_=+). Turn any of them on or off. At least one must be selected, otherwise the generator asks you to pick a set.
- How long can the random strings be, and how many can I make at once?
- Each string can be from 1 to 256 characters using the Length field. The How many field lets you create up to 500 strings in a single click, with one result per line so you can copy them all together.
- Are these random strings safe to use as tokens or API keys?
- They are generated on the fly in your browser and never sent anywhere, which is good for one-off tokens, test fixtures, and placeholder IDs. For production secrets that protect real accounts, also follow your platform's own key-rotation and storage guidance.
- Is the random string generator really free with no sign-up?
- Yes. It is completely free, needs no account, and has no usage limits. Nothing is uploaded because every string is built locally on your device.
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Last updated: June 15, 2026