The fastest utility tools
on the web
Text tools, calculators, and SEO utilities. Instantly. In your browser.
Peregrine Kit offers 31 free text tools, calculators, and SEO utilities — from word counters and case converters to mortgage calculators and meta tag generators. All processed instantly in your browser.
Text Tools
Process, analyze, and transform text
Calculator Tools
Quick calculations for everyday life
SEO & Marketing Tools
Optimize your website and campaigns
Why Peregrine Kit
100% private
Your data never leaves your device. No uploads, no servers, no tracking.
Instant & free
No sign-up, no watermarks, no limits. Open any tool and start using it immediately.
31 purpose-built tools
Text utilities, calculators, and SEO tools — each one focused and fast, not a shallow gimmick.
Tips & Guides
How to Improve Your Writing with Readability Scores
Learn how readability metrics like Flesch-Kincaid can help you write clearer, more engaging content for any audience.
The Complete Guide to Meta Tags for SEO
Everything you need to know about title tags, meta descriptions, Open Graph tags, and robots directives to improve your search rankings.
Compound Interest Explained: How Your Money Grows
Understand how compound interest works, see the math behind it, and learn why starting early makes such a big difference.