Developer Blog
Developer tutorials for JSON, regex, cron, CSS, SEO, DevOps, PDF workflows, and AI-assisted coding — from the CodeKitLab team.
Thoughts, stories and ideas.
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These cornerstone guides and high-intent tools deserve the most attention from readers and crawlers, so we surface them prominently on the blog homepage.
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Most-used tools
Go straight to the tools
Privacy-First JSON to CSV: A Safer Browser Workflow for Modern Teams
Learn why privacy-first browser tooling still matters when teams are moving faster with AI copilots, shared prompts, and sensitive production data.
Jul 3, 2026
2 min read
reference
HTTP Status Codes — Free Online Tool
Complete reference for all HTTP status codes
tools
Developer Productivity: 20 Tools You Should Be Using Daily
A curated list of 20 developer tools that will streamline your daily workflow.
analyze
CSV Viewer — Free Online Tool
View CSV as sortable, searchable table
Code Kit Lab
Feb 28, 2026
analyze
URL Parser — Free Online Tool
Parse URL into protocol, hostname, path, query
Code Kit Lab
Feb 27, 2026
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Color Contrast Checker — Free Online Tool
Check WCAG 2.1 contrast ratios
Code Kit Lab
Feb 26, 2026
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Docker Compose Validator — Free Online Tool
Validate docker-compose.yml files
Code Kit Lab
Feb 26, 2026
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XPath Tester — Free Online Tool
Test XPath expressions against XML
Code Kit Lab
Feb 25, 2026
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JSON Path Evaluator — Free Online Tool
Evaluate JSONPath expressions against JSON
Code Kit Lab
Feb 24, 2026
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Crontab Validator — Free Online Tool
Validate cron expressions and next run times
Code Kit Lab
Feb 23, 2026
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.env Validator — Free Online Tool
Validate .env files detect syntax errors
Code Kit Lab
Feb 23, 2026
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Open Graph Preview — Free Online Tool
Preview how page looks on social media
Code Kit Lab
Feb 22, 2026
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Understanding Regular Expressions — A Visual Guide
A beginner-friendly visual guide to mastering regular expressions with practical examples.
Code Kit Lab
Feb 21, 2026
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Character Counter — Free Online Tool
Count characters, words, lines, paragraphs
Code Kit Lab
Feb 21, 2026
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Diff Checker — Free Online Tool
Compare and highlight differences between texts
Code Kit Lab
Feb 20, 2026
analyze
Regex Tester — Free Online Tool
Test and debug regular expressions live
Code Kit Lab
Feb 19, 2026
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SVG Optimizer — Free Online Tool
Strip comments, metadata from SVG files
Code Kit Lab
Feb 18, 2026
minify
JS Minifier — Free Online Tool
Minify JavaScript to reduce bundle size
Code Kit Lab
Feb 18, 2026
minify
HTML Minifier — Free Online Tool
Remove whitespace and comments from HTML
Code Kit Lab
Feb 17, 2026