PowerApps Ninja
Free Online Developer Tools
Format JSON, check Power Fx formulas, pick colors and decode tokens in seconds. Free tools that run privately in your browser.
Popular tools
- Power Fx Cheat Sheet
Search common Power Fx functions with syntax, plain-English descriptions and copy-ready examples for Power Apps canvas apps.
- Power Fx Formula Checker
Paste a Power Fx formula and check it for missing brackets, wrong quotes, unknown functions and wrong argument counts. Runs in your browser.
- JSON Formatter
Format and beautify JSON online. Paste minified or messy JSON, get clean indented output and clear error messages. Runs in your browser.
- Base64 Decoder
Decode Base64 strings to readable text online. Supports URL-safe Base64 and UTF-8. Free and private, runs in your browser.
- Color Picker
Pick any color and copy its HEX, RGB, HSL, HSV, CMYK and OKLCH codes. See shades, tints, harmonies and WCAG contrast. Free, in your browser.
- JWT Decoder
Decode a JWT to see its header, payload and expiry time. Runs entirely in your browser, so your token is never uploaded.
All tools by category
Every tool is one click away.
Look up Power Fx functions with examples and check your Power Apps formulas for syntax mistakes. Free and in your browser.
Pick colors, copy HEX, RGB, HSL and OKLCH codes, build palettes and convert between HEX and RGB. Free and in your browser.
Free browser-based JSON tools to format, validate and minify JSON. Your data stays on your device.
Encode and decode Base64 and URL strings in your browser. Fast, free and private.
Inspect JWTs and generate SHA-256 hashes locally in your browser without uploading anything.
Generate UUIDs, test regular expressions and convert Unix timestamps online for free.
How it works
Pick a tool
Search above or browse the categories.
Paste your data
Type or paste it in. Nothing is uploaded.
Copy the result
Use the copy button or download the output.
Why use PowerApps Ninja
Private by design
Processing happens locally in your browser, so API responses, tokens and config files are never uploaded.
Fast, focused pages
Each tool has its own lightweight page with examples and answers, and no account is needed.
Built for makers
Handy for Power Apps, Power Automate and web projects where you constantly inspect JSON, encodings and tokens.
Free online tools for Power Apps makers and developers
PowerApps Ninja brings together the small utilities you use every day: a JSON formatter and validator for API and flow responses, Base64 and URL encoders, a JWT decoder, a regex tester, a color picker with hex to RGB conversion, and a Power Fx cheat sheet with a formula checker for canvas apps.
Frequently asked questions
Are these developer tools really free?
Yes. Every tool on PowerApps Ninja is free to use and needs no sign-up.
Is my data uploaded anywhere?
No. The tools run in your browser, so pasted JSON, tokens and text stay on your device.
Can I use them for Power Apps and Power Automate work?
Yes. Format the JSON returned by a flow, decode a Base64 value from a connector, or test a pattern before you use it in your app.
Which tools are available?
JSON formatter, validator and minifier, Base64 and URL encoders and decoders, a JWT decoder, UUID and SHA-256 generators, a Unix timestamp converter, a regex tester, and a Power Fx cheat sheet with a formula checker. More are added over time.