HiGuard runs locally in your browser and flags unfilled placeholders while you write. If you try to send with a “{{company}}” still there, it warns you instantly — nothing is sent to any server. Works on Gmail, LinkedIn, Outlook, and most web editors.
HiGuard runs silently in the background. No dashboards, no learning curve.
Add HiGuard from the Chrome Web Store. Takes ~10 seconds. No account required.
Compose in Gmail, LinkedIn, Outlook, and most web-based messaging tools like normal.
Hit send or Cmd+Enter and HiGuard shows an alert if placeholders remain. Go back and fix — or send anyway.
Every feature exists to save you from one thing: sending a broken message.
Placeholders turn red as you type or paste. You see the problem before you hit send.
Catches {{double braces}}, {single braces}, [[double brackets]], [brackets], and <angle brackets>.
Detects send buttons in 35+ languages. Works regardless of your browser language.
Install and forget. No settings to adjust, no accounts to create.
Save your best outreach templates with required fields marked. Insert with one click.
Coming SoonWhen context is available (open LinkedIn tab, email thread), HiGuard suggests what to fill.
RoadmapOne mistake can undo weeks of relationship-building. HiGuard makes sure it never happens.
Send hundreds of cold emails without a single placeholder slip.
Reach out to candidates without accidentally leaving in merge fields.
Submit cover letters and networking messages that always look polished.
Pitch investors and partners with messages that read like they were handwritten.
HiGuard works in most web-based editors — Gmail, LinkedIn, Outlook, and many others. No extra apps, no switching tools.
Get early access to HiGuard and be the first to know when we launch on the Chrome Web Store.
No spam. We only email you when HiGuard is ready.