Learn

Guides, examples and references to get the most out of DevToolsHub.

Tool guides

Paste any JSON to pretty-print it instantly. Toggle 2/4 spaces or tabs, sort keys, or switch to minified output. Invalid JSON shows the exact line and column.

Inspecting a JWT

Paste a token to reveal its header and payload claims. Expiry is highlighted, and you can jump straight to the Timestamp Converter for any epoch value.

Testing regular expressions

Enter a pattern and flags, then type a test string. Matches highlight live and a count appears beside the output.

Sending a test request

Pick a method, enter a URL, add headers and a body, then send. The response status, headers and body are shown. Browser CORS may restrict some endpoints.

Examples

Pretty-print an API response

Paste a minified JSON response into the JSON Formatter to make it readable.

Open tool

Generate TypeScript types

Convert a sample JSON payload into a TypeScript interface with one paste.

Open tool

Decode a Base64 token

Drop a Base64 string in to decode it back to readable text.

Open tool

Build a cron schedule

Use a preset or write an expression to see the next 5 execution times.

Open tool

Developer reference

HTTP Status Codes Color formats (HEX/RGB/HSL)Number bases (bin/oct/dec/hex)Unix timestamp reference