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Developer Tools

A handy collection of mini dev tools—JSON formatter, base64 encoder, regex tester, hash generator, and more. Everyday utilities to speed up your coding workflow, all in one lightweight set.

Developer Tools

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JSON Formatter

Gosha5h ago

About developer tools on PlayApp

A handy collection of mini dev tools—JSON formatter, base64 encoder, regex tester, hash generator, and more. Everyday utilities to speed up your coding workflow, all in one lightweight set. Every utility listed here is a small, focused tool — one HTML page or a short bundle of files — shared by an indie creator on PlayApp. You can open any of them directly in your browser, no install or account required.

Browsing this category is the fastest way to find a working developer tools utility built by someone in the community. If you have one of your own, you can publish it in seconds. Pick Developer Toolsas the category in Settings → Publish and it'll appear on this page.

More on PlayApp

  • Productivity— Tools that help you get things done — timers, to-do lists, planners, and focused workspaces.
  • Calculators— Specialized calculators for finance, units, dates, science, and everyday math.
  • Games— Tiny browser games — puzzles, arcades, word games, and quick distractions.
  • Generators— Generate names, passwords, palettes, lorem ipsum, fake data, and other useful (or fun) output.
  • Converters— Convert between units, formats, encodings, time zones, currencies, and file types.
  • Visualizations— Charts, graphs, simulations, and interactive visual demos.
  • Text— Text utilities — case converters, diff viewers, regex testers, formatters, and writing tools.
  • Design & Color— Tools for designers — color pickers, palette builders, gradient editors, and visual helpers.
  • Music & Sound— Audio tools — metronomes, tuners, drum machines, synths, and sound experiments.
  • Education— Learning aids — flashcards, quizzes, demonstrations, and study tools.
  • Fun— Joyful little experiments and curiosities.
  • Audio— Audio utilities
  • Mobile App Marketing— Mobile App Marketing is the practice of promoting apps to increase downloads, user acquisition, and retention through ASO, paid ads, social media, and influencer marketing to drive visibility and growth.
  • Other— Utilities that don't quite fit anywhere else.