We built CoolTool so solopreneurs, ops teams, and builders can act faster without juggling installs, waiting on queues, or compromising privacy.
Latest wins
Live now420,000+
daily creators who ship faster
Human story
“CoolTool keeps my studio moving—no installs, no IT help. Every tool feels handwritten for productivity.” — Mira, founder.
Micro ritual
Start each day by opening CoolTool, pick an instant helper, and finish the task before your coffee gets cold.
Spotlight
Currency Converter
Track favorites, inspect historical swings, lock rate tables, and export CSV/PDF summaries for finance reviews.
Crypto Converter
Toggle between fiat ↔ crypto conversions, build watchlists, and export quotes to support investor decks.
Trending
Calculate BMI, healthy weight range, and get instant follow-up guidance.
Used across 18,000+ health sessions
Compare times across zones, schedule meetings, and copy ready-to-send links.
Trusted by distributed teams
Generate branded, scanner-ready QR menus with control over size and error correction.
Deployed in 200+ kitchens
Health toolkit
Enter height and weight to get BMI, category, and healthy range instantly.
Avg rating 4.9/5
Estimate body fat percentage with multiple trusted formulas.
Used by fitness coaches
Plan your hydration goals with personalized reminders.
Boosts focus in 10 min
Web optimizing tools
Shrink JPEG/PNG assets while keeping sharpness for faster pages.
7.8s -> 1.9s load
Capture responsive previews to validate designs before deploy.
Preview in 1 click
Catch downtime and broken endpoints before customers do.
Checks every 60s
Trust + growth
CoolTool is a workplace staple for marketing, ops, and dev teams. Every new feature ships with a reliable performance bar and privacy-first defaults.
Over 420k daily visitors trust CoolTool to handle data, media, and productivity workflows without installations.
Partnered with agencies and startups to integrate CoolTool functionality into internal dashboards.
Tools run entirely client-side where possible, and we never sell or log your content.
Most used
Live data updated every hour and optimized for desktop or mobile sessions.
420k+
+18% vs last week
32k
Stable
4m 12s
+0.6m
Catalog overview
Dive straight into the category that fits your workflow and explore every featured utility.
Best of CoolTool
The wellness + workflow trio—BMI Calculator, Image to Text, Password Generator keep focus and security in sync.
Security-first utilities like Password Strength Checker, JWT Decoder, and Webhook Tester stay on-device.
JSON to CSV, CRM-ready Domain Name Generator, and Resume Bullet Rewriter are built for modern teams.
We built CoolTool around the things that matter most.
Tools run in your browser. No uploads to servers, no waiting for processing queues.
Your data stays on your device. We don't store files, log activity, or sell data.
No subscriptions, no trials, no paywalls. Every tool is free today and free forever.