Generate Random ASCII
Generate a string of random ASCII characters. Runs entirely in your browser, so your data never leaves your device.
Output
The result appears here as you type.
How to use Generate Random ASCII
- 1. Set how many characters you want. This is a generator, so begin with the Count field. Enter the exact number of characters to produce, whether that is 16 for a quick token or several thousand for a load-testing payload.
- 2. Decide on printable output. Tick Printable characters only (32-126) to restrict the result to visible ASCII, which is safe to paste anywhere. Untick it to include control characters when you specifically want hostile, unprintable input for robustness testing.
- 3. Copy your random string. A fresh string appears in the output pane, different on every run. Copy it into your test, form field or fixture file, and regenerate as many variants as your scenario needs.
When to use Generate Random ASCII
Generate Random ASCII gives you arbitrary strings of a precise length on demand. Development is full of moments that need throwaway data: a placeholder API key, a fuzzing input, a field filled to exactly its limit. Everything is produced locally in your browser, so nothing you generate is ever sent to a server.
- Filling a field to its exact limit. To prove a form truncates at 255 characters, you need a 255-character string and then a 256-character one. Set Count accordingly and generate both boundary cases in seconds.
- Fuzzing a parser with control characters. Untick the printable-only box and generate input laced with bells, escapes and null-adjacent codes. Feeding that into a CSV importer or log parser quickly reveals assumptions about clean input.
- Creating placeholder secrets for docs. A README or runbook needs an example token that is obviously fake but realistically shaped. A 32-character printable string looks the part without leaking anything real.
- Seeding unit test fixtures. Property-style tests want varied string inputs rather than 'foo' everywhere. Generate a handful of random strings of different lengths and paste them into your fixture array.
Examples
16 printable characters
Output
k}2>Qk#7!p]R@8vT
About the Generate Random ASCII tool
Generate Random ASCII runs as plain JavaScript in your browser tab, with no server behind it. Generate a string of random ASCII characters. Whatever you put in stays on your device from start to finish.
The tool is part of EditSafely's ASCII Tools section, 81 single-purpose utilities built around the same idea: open the page, get the result, keep your data to yourself.
You can shape the output with 2 settings, including Count and Printable characters only (32–126), and the result refreshes the moment you change one. A worked example further down the page shows exactly what the tool produces for a real input.
That local-first design has practical benefits beyond privacy. The tool keeps working on a flaky connection once the page has loaded, results are instant because nothing round-trips to a server, and it is safe to use with confidential material.
Frequently asked questions
Does Generate Random ASCII cost anything?
Yes, it is completely free. All 2,658 tools on EditSafely work without an account, a subscription or usage limits.
Does the generator send anything to a server?
No data leaves your device. The whole tool is JavaScript that runs inside your browser tab, so there is no upload, no server-side processing and no log of what you did. If you disconnect from the internet after the page loads, it keeps working.
How do I get a different result?
Run the generator again. Each run is computed fresh on your device, and any options you change are applied to the next result immediately.
Do I need to sign up or install anything?
Nothing to install and no account needed. Open the page in any up-to-date browser, including on a phone or tablet, and the tool is ready.
How do I use the result?
The output panel has a one-click copy button, and you can keep refining the input while you work; the result updates in place as you type.