Developer Tools
Small utilities that the tutorials on this blog link to. They run in your browser, so what you paste stays on your machine. No signup.
Laravel & PHP
Converters and references for everyday Laravel work.
Cron Expression Builder
Build and validate cron schedule expressions
Regex Tester
Test and debug regular expressions
CSV to SQL Converter
Generate SQL INSERT, CREATE TABLE, and UPDATE statements from CSV data with auto type detection
Crontab Guru
Build, validate, and understand cron expressions with human-readable explanations and next scheduled run times. Interactive crontab editor for developers.
HTTP Status Codes Cheat Sheet
Complete HTTP status codes reference with descriptions, categories, and examples. Search and filter all 1xx-5xx response codes instantly.
JSON to PHP Array Converter
Convert JSON data to PHP array syntax instantly. Supports short and long array syntax, trailing commas, and variable assignment.
Formats & Text
Format, convert and compare data and text.
Markdown Preview
Write and preview Markdown with real-time rendering, GitHub Flavored Markdown support, and syntax highlighting
Diff Checker
Compare two texts and highlight differences instantly
JSON Formatter & Validator
Format, validate, and minify JSON instantly
Base64 Encoder/Decoder
Encode and decode Base64 strings
YAML to JSON Converter
Convert YAML configs to JSON format for APIs and data exchange
Robots.txt Generator
Create robots.txt files with a visual editor. Add rules for search engines and AI bots, set crawl delays, and include sitemaps.
Security & IDs
Hashes, passwords and unique identifiers.
Business Calculators
Numbers for pricing an MVP or a SaaS, used in the founder guides.
Break-Even Calculator
Calculate your break-even point in units and revenue, contribution margin, and profit at any sales volume.
Gross Profit Calculator
Calculate gross profit, gross profit margin, and markup from revenue and cost of goods sold (COGS) instantly.
Cost Per Unit Calculator
Calculate cost per unit and compare pricing between products to find the best deal instantly.
No tools match your search.
Runs in your browser
What you paste is processed on your machine. It is never sent to a server.
No signup
Open a tool and use it. No account and no usage limits.
Used in the tutorials
Each tool is linked from a post or guide on this site, where you can see it in use.