Edge-Case / Naughty String Generator
Browse, filter, and export a curated library of 200+ naughty edge-case test strings — the Big List of Naughty Strings plus Unicode, emoji, RTL/bidi overrides, zalgo, SQL injection, XSS payloads, control chars, zero-width, null bytes, boundary values, and more. Categorized, searchable, seed-reproducible random sampling, and one-click export to JSON, CSV, Playwright, Jest, or pytest fixtures. 100% client-side, defensive QA use only.
Browse, filter, and export a curated library of 200+ naughty edge-case test strings — the Big List of Naughty Strings plus Unicode, emoji, RTL/bidi overrides, zalgo, SQL injection, XSS payloads, control chars, zero-width, null bytes, boundary values, and more. Categorized, searchable, seed-reproducible random sampling, and one-click export to JSON, CSV, Playwright, Jest, or pytest fixtures. 100% client-side, defensive QA use only. Everything runs locally in your browser — your data never leaves your device.
How to use
- Enter your input in the tool above.
- Adjust any options to your preference.
- Use the Copy or Download buttons to save the result.
- Everything happens locally — your data never leaves your browser.