Random String Generator
Generate cryptographically random strings with custom charset.
About Random String Generator
Random String Generator is a free online generator that creates useful output in seconds. Generate cryptographically random strings with custom charset. It is designed for creators, developers, students and office users who need quick results without signup or installation. Adjust the settings, generate the result, then copy or download it for your project, document, website or workflow.
How to use
- 1Pick the string length.
- 2Choose character sets (letters, digits, symbols, hex).
- 3Set how many strings to generate.
- 4Click Generate to produce the batch.
- 5Copy the results or download as text.
Features
- Custom length up to 256 characters
- Letters, digits, symbols and hex modes
- Generate up to 1000 strings at once
- Unique-only option
- Cryptographically secure randomness
- Copy or download instantly
Privacy
ToolHub is built with privacy in mind. Random String Generator is designed to process your input with minimal friction, and most browser-based tasks happen locally whenever possible. For best privacy, avoid entering passwords, private financial records or highly sensitive personal information into any online tool, and clear the input area after you finish.
Frequently asked questions
Are these strings cryptographically secure?
Yes — they are produced with the Web Crypto API, suitable for tokens and IDs.
Can I generate API keys?
Yes — choose a hex or alphanumeric character set and a long length for high entropy.
Are duplicates removed?
Toggle the unique-only option to deduplicate within your batch.
Can I use only hex characters?
Yes — the hex mode produces strings using 0–9 and a–f only.
Where are the strings stored?
Nowhere — they live only in your browser until you copy them.