Encoding & crypto
Random string generator
Create random strings from alphanumeric or custom character sets for test data.
API keys, temporary passwords, and fixture IDs often need high-entropy strings. This generator pulls bytes from `crypto.getRandomValues` when available and maps them into your chosen alphabet—great for staging, not a substitute for HSM-backed production secrets.
Similar tools
Quick links to related utilities—same workflow, different input or output.
- Encoding & cryptoUUID generatorGenerate random UUID version 4 identifiers for databases and tests.Open
- Encoding & cryptoHash generatorCompute SHA-256, SHA-384, or SHA-512 digests of UTF-8 text in hex.Open
- Text & devLorem ipsum generatorCreate placeholder text by word count for layouts and mockups.Open
FAQs
Is this cryptographically secure?›
Suitable for many testing scenarios; for production secrets, use your cloud provider’s secret manager or KMS.
Can I exclude ambiguous characters?›
Choose a charset preset that drops confusing characters like `O` vs `0` when generating codes for humans.
General
Do these tools send my data to Exemplar’s servers?›
By default, conversion and formatting run entirely in your browser. Nothing is uploaded to Exemplar for normal paste-and-transform workflows. Tools that deliberately open an external service (for example, a third-party speed test) are called out on the page.
Do I need an account or install anything?›
No account is required. Everything runs in the browser—there is nothing to install for these utilities. They complement the Exemplar platform but work standalone.
Are these utilities open-source or the same as other sites?›
These pages are built for Exemplar’s audience (developers working with APIs, config, and ops data). Behavior may differ slightly from other online tools; always verify critical output in your own environment.
Are there size or performance limits?›
Very large inputs can slow down or crash the tab—especially for images, huge JSON, or multi‑MB HAR files. For production-scale data, prefer local CLI tools, streaming parsers, or your own pipelines.
Can I use output in production?›
Yes, when you have validated it. Parsers and formatters here aim to be helpful for everyday tasks but are not a substitute for tests, schema validation, or security review where it matters.
Where can I read more about privacy?›
See our Privacy policy at /privacy for how exemplar.dev handles site analytics and general data practices.