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Developer Toolkit

Test regex, parse URLs, generate UUID v4 or v7, format SQL and XML, preview Markdown and inspect common developer values locally.

Overview

Test regex, parse URLs, generate UUID v4 or v7, format SQL and XML, preview Markdown and inspect common developer values locally. This overview compares the available workflows so you can choose the smallest tool that completes the task without opening heavyweight software.

The toolkit currently connects Regex Tester, UUID Generator, JWT Decoder, URL Encoder and Decoder, HTML Encoder and Decoder, and related utilities. Each one has a direct URL, focused controls and guidance for checking the result before it moves into another project.

Benefits

  • Start from the toolkit page when you want to compare related utilities.
  • Open a specific tool page when you already know the exact task.
  • Move between adjacent actions such as formatting, validating, converting, cleaning or exporting.
  • Use browser-side workflows where supported so common inputs stay on your device.

Feature comparison

Tool Best for Open
Regex Tester Test JavaScript regular expressions with flags, matches and groups. Open tool
UUID Generator Generate one or many random UUID v4 identifiers locally in the browser for testing, databases and APIs. Open tool
JWT Decoder Decode JWT header and payload sections locally without verification. Open tool
URL Encoder and Decoder Encode and decode URL components safely for query strings and paths. Open tool
HTML Encoder and Decoder Escape HTML entities and decode HTML text for templates and content. Open tool
Unicode Inspector Inspect Unicode code points, characters and UTF information. Open tool
XML Formatter and Validator Validate, format and minify XML locally while preserving elements, attributes and text content. Open tool
SQL Formatter Format common SQL statements with readable clauses and indentation for review, debugging and documentation. Open tool
Markdown Preview Preview common Markdown safely and copy its generated HTML without sending your content to a server. Open tool
Query String Parser Parse URL query parameters into JSON or build an encoded query string from a JSON object. Open tool
Cron Expression Parser Validate standard five-field cron expressions and explain minute, hour, day, month and weekday schedules. Open tool
URL Parser Parse a URL into protocol, host, port, path, query parameters, hash and origin, or resolve a relative URL against a base. Open tool
UUID v7 Generator Generate RFC 9562 UUID version 7 identifiers with a sortable Unix timestamp prefix using secure browser randomness. Open tool

How to choose a tool

Start with the most specific task in front of you: format, validate, generate, convert, clean, compare, calculate or export. If the result needs another step, use the nearby tools in this toolkit instead of copying the same input into a separate website.

For recurring work, bookmark the exact tool URL instead of the overview. The overview remains useful when you are exploring the toolkit or deciding which utility fits a new workflow.

Tools

Browse Developer Toolkit

Developer Tools Regex Tester Test JavaScript regular expressions with flags, matches and groups. Developer Toolkit Developer Tools UUID Generator Generate one or many random UUID v4 identifiers locally in the browser for testing, databases and APIs. Developer Toolkit Developer Tools JWT Decoder Decode JWT header and payload sections locally without verification. Developer Toolkit Developer Tools URL Encoder and Decoder Encode and decode URL components safely for query strings and paths. Developer Toolkit Developer Tools HTML Encoder and Decoder Escape HTML entities and decode HTML text for templates and content. Developer Toolkit Developer Tools Unicode Inspector Inspect Unicode code points, characters and UTF information. Developer Toolkit Developer Tools XML Formatter and Validator Validate, format and minify XML locally while preserving elements, attributes and text content. Developer Toolkit Developer Tools SQL Formatter Format common SQL statements with readable clauses and indentation for review, debugging and documentation. Developer Toolkit Developer Tools Markdown Preview Preview common Markdown safely and copy its generated HTML without sending your content to a server. Developer Toolkit Developer Tools Query String Parser Parse URL query parameters into JSON or build an encoded query string from a JSON object. Developer Toolkit Developer Tools Cron Expression Parser Validate standard five-field cron expressions and explain minute, hour, day, month and weekday schedules. Developer Toolkit Developer Tools URL Parser Parse a URL into protocol, host, port, path, query parameters, hash and origin, or resolve a relative URL against a base. Developer Toolkit Developer Tools UUID v7 Generator Generate RFC 9562 UUID version 7 identifiers with a sortable Unix timestamp prefix using secure browser randomness. Developer Toolkit

Developer Toolkit FAQ

What is included in Developer Toolkit?

Developer Toolkit includes Regex Tester, UUID Generator, JWT Decoder, URL Encoder and Decoder, HTML Encoder and Decoder, and additional tools in the same workflow.

Which Developer Toolkit tool should I use first?

Choose the page whose name matches the immediate task. The toolkit description and comparison table explain where each tool starts, what it produces and which related step may come next.

Do Developer Toolkit tools upload my data?

The tools are designed around browser-side processing wherever browser APIs support the workflow, so common text, code, image and calculation tasks stay local.

Are results ready to use immediately?

Most results can be copied or downloaded immediately, but important work should still be reviewed for context, units, formatting and accuracy.

Can I bookmark tools inside Developer Toolkit?

Yes. Each major function has a direct URL that opens the matching tool for repeat use.