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Developer & Engineer Toolkit tools

Data, regex, encoding and playgrounds Every tool below runs in your browser — no sign-up, no upload, no hidden tracking. Browse 15 developer & engineer toolkit tools, organized into 6 sub-categories so you can find what you need fast.

Browse by sub-category

Data & Format Conversion
Data & Format Conversion
Regex & Pattern Matching
Regex & Pattern Matching
Encoding, Hashing & Crypto
Encoding, Hashing & Crypto
Schedulers & Cron
Schedulers & Cron
Web, API & SEO Helpers
Web, API & SEO Helpers
HTML / CSS Playgrounds
HTML / CSS Playgrounds

All developer & engineer toolkit tools

15 tools
Interactive HTML Viewer & Designer
Live HTML/CSS playground with sandboxed preview and one-click style templates.
JSON Formatter
Beautify, minify and validate JSON.
Regex Tester
Test JavaScript regex with live highlighting.
Base64 Encode / Decode
Convert between text and Base64.
URL Encoder
Encode or decode URL components.
JWT Decoder
Inspect any JSON Web Token.
SQL Formatter
Pretty-print SQL queries with proper indentation.
HTML Entities
Escape and unescape HTML safely.
Number Base Converter
Binary, octal, decimal and hexadecimal.
Cron Explainer
Translate any cron expression into English.
Meta Tag Generator
SEO, Open Graph and Twitter tags in one click.
HTTP Status Codes
Searchable reference for every status code.
robots.txt Generator
Tell crawlers exactly what to index.
User-Agent Parser
Detect browser, OS and device from any UA.
CSV to JSON
Convert CSV data into clean JSON arrays.

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