Five concrete examples of the RSA Key Generator in real use. Each one shows the situation, what you put in and what comes out, so you can copy the structure, swap in your details and adapt it this week.
Example 1: Creating a key pair for JWT signing
The task: Creating a key pair for JWT signing. You start from a key size such as 2048 or 4096 bits.. The tool returns the public and private keys in PEM format, including the modulus and exponent values., giving you a fresh key pair you can load into a client, server or signing step. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 2: Generating keys for an SSH setup
The task: Generating keys for an SSH setup. You start from a key size such as 2048 or 4096 bits.. The tool returns the public and private keys in PEM format, including the modulus and exponent values., giving you a fresh key pair you can load into a client, server or signing step. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 3: Testing an encryption workflow locally
The task: Testing an encryption workflow locally. You start from a key size such as 2048 or 4096 bits.. The tool returns the public and private keys in PEM format, including the modulus and exponent values., giving you a fresh key pair you can load into a client, server or signing step. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 4: Replacing a weak or expired key
The task: Replacing a weak or expired key. You start from a key size such as 2048 or 4096 bits.. The tool returns the public and private keys in PEM format, including the modulus and exponent values., giving you a fresh key pair you can load into a client, server or signing step. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
Example 5: Learning how modulus and exponents fit together
The task: Learning how modulus and exponents fit together. You start from a key size such as 2048 or 4096 bits.. The tool returns the public and private keys in PEM format, including the modulus and exponent values., giving you a fresh key pair you can load into a client, server or signing step. you can edit rather than a blank page.
Make it yours: add one detail the tool cannot know - a real number, a name, a constraint - then read the result once end to end before you keep it.
A Full Worked Example
Input: key size 2048 bits
A PEM private key block and matching public key, both sharing the same modulus with different exponents.
The pattern behind every example above: context and constraints go in, structure comes out, and your edit makes it true.
How to Build Your Own Examples
- Take a task already on your calendar for this week.
- Write the brief in two sentences: the job and the audience.
- Generate, compare against the version you would have written manually.
- Save the prompt alongside the result so the second run takes seconds.
Getting More From Each Example
Most people stop at the first result. Generate a second version with one changed variable - length, tone or angle - and compare. The better version usually appears on the second run, not the first.
Frequently Asked Questions
What key size should I choose?
2048 bits is a practical default today, with 3072 or 4096 reserved for keys expected to protect data for many years.
Is the private key ever sent anywhere?
Generation happens locally in the browser, so the private key never needs to leave your machine - keep it that way.
What are the modulus and exponents?
They are the numeric parts of an RSA key: the modulus plus a public exponent for encryption or verify, and a private exponent for decrypt or sign.
Can I reuse this key pair in production?
Yes if generated at a strong size and stored securely, but never share the private half and rotate it on a schedule.
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