IconVault's String Masker hides sensitive text before you share it in screenshots, tickets, docs or demos. Paste a list of items, one per line, and mask the middle characters while keeping the first N and last N characters visible, turning an API key like `Secret12345` into `S*****2345`. Choose a mask character such as *, #, the bullet, x or _.

Dedicated presets handle the two most common cases: emails are masked to `j*@gmail.com`, keeping the domain readable, and phone numbers keep only the last 4 digits. Everything runs fully in your browser, so the original unmasked values are never uploaded, and it is free** to try.