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PlayTools
free calculators, converters & dev tools — no sign-up
PlayTools offers free online calculators, converters, and developer tools — loan, compound interest, JSON formatter, unit converter & more. Runs in your browser with no sign-up. Privacy-focused, fast, and always available.
I built PlayTools because I kept bouncing between a dozen different
sites for simple stuff — a loan calculator here, a JSON formatter
there, a favicon generator somewhere else — each one cluttered with
ads or asking me to sign up just to see a result.
PlayTools puts 67 of these tools in one place:
💰 Finance — loan/mortgage/auto loan calculators, compound interest, ROI
📅 Date & Time — age calculator, timezone converter, business days
🛠️ Developer — JSON/YAML/CSV converters, regex tester, JWT decoder, cron generator
🔍 SEO — meta tag generator, robots.txt generator, keyword density checker
📝 Text — word counter, case converter, diff checker, markdown editor
🖼️ Images — compressor, resizer, favicon & app icon generators
⚙️ Utilities — password generator, unit converter, QR code generator
A few things I care about:
- No sign-up, ever — open a tool and use it immediately
- Most tools run entirely client-side, so your data (images, text,
numbers) never leaves your browser
- Free, and staying free
Still actively adding tools based on what people ask for, so I'd
love to hear which ones you'd want next — or any bugs you spot.
Thanks for checking it out! 🙏
About PlayTools on Product Hunt
“free calculators, converters & dev tools — no sign-up”
PlayTools was submitted on Product Hunt and earned 1 upvotes and 1 comments, placing #154 on the daily leaderboard. PlayTools offers free online calculators, converters, and developer tools — loan, compound interest, JSON formatter, unit converter & more. Runs in your browser with no sign-up. Privacy-focused, fast, and always available.
On the analytics side, PlayTools competes within Web App, Productivity and Developer Tools — topics that collectively have 1.3M followers on Product Hunt. The dashboard above tracks how PlayTools performed against the three products that launched closest to it on the same day.
Who hunted PlayTools?
PlayTools was hunted by jiang li. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of PlayTools including community comment highlights and product details, visit the product overview.
jiang li