Free Online Diff Checker & Text Compare Tool Compare two blocks of text and instantly see what changed. This free diff checker highlights additions, deletions, and unchanged lines — perfect for comparing code versions, config files, or any two documents. Features Line-by-line text comparison Color-coded additions (green) and deletions (red) Optional whitespace-ignoring mode Swap inputs with… Read more →
Security, DevOps & Trading Tech — Practical Guides
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Free SQL Formatter & Beautifier Online — Format SQL Queries Instantly
Free Online SQL Formatter & Beautifier Format messy SQL queries into clean, readable code instantly. This free tool properly indents SELECT, JOIN, WHERE clauses and uppercases SQL keywords — making complex queries easy to read and debug. Features Automatic indentation of SQL clauses Uppercase keyword conversion SQL minification for production use Supports all major SQL dialects 100%… Read more →
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Free YAML Validator & Formatter Online — Check YAML Syntax Instantly
Free Online YAML Validator & Formatter Validate your YAML syntax, fix indentation issues, and convert between YAML and JSON formats instantly. This free tool uses the popular js-yaml library for accurate parsing — perfect for Kubernetes configs, Docker Compose files, CI/CD pipelines, and any YAML workflow. Features Real-time YAML syntax validation with detailed… Read more →
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I Built a Python Script That Alerts Me to SEC Insider Buying — Here’s the Code
Last October, I noticed three directors at a mid-cap biotech all bought shares within the same week. The stock was down 40% from its high. Two months later it doubled on a pipeline update. I didn’t trade it — I found out from a Twitter thread three days after the… Read more →
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I Caught 14 Leaked Secrets in My Git History — Here’s the Pre-Commit Setup That Stops It
Last month I ran trufflehog against one of my private repos — a homelab automation project I’d never planned to open-source. It found 14 live secrets. AWS keys, a Telegram bot token, two database passwords, and a Stripe test key that still had access to customer data. All committed between… Read more →
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Quiet Gaming Laptops (2026): 8 Picks That Won’t Sound Like a Jet Engine
Gaming laptops have a fan-noise problem that desktops don’t. Cram an RTX-class GPU into a 0.8-inch chassis and physics demands you move a lot of air through a small radiator — which means small fans spinning fast, which means whine. After a year of testing the current generation of “quiet… Read more →
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Your Photos Are Broadcasting Your Home Address — How EXIF Metadata Works and How to Strip It
Last month I helped a friend figure out why a stalker knew her daily routine. The answer was in her Instagram stories — not the content, but the metadata baked into every JPEG she posted. GPS coordinates, timestamps accurate to the second, even her phone model. Instagram strips EXIF on… Read more →
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Free Unix Timestamp Converter Online — Epoch to Date & Date to Epoch
Convert Unix timestamps to human-readable dates and dates to epoch time instantly. Supports seconds and milliseconds, multiple timezones, and ISO 8601 format. Free, no signup — everything runs in your browser. Timestamp → Date Convert to Date Date → Timestamp … Read more →
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Free Markdown Table Generator Online — Create Tables Instantly
Generate Markdown tables visually with this free online tool. Add rows and columns, import from CSV or Excel, and export clean Markdown table syntax for GitHub, GitLab, Notion, and documentation. No signup required — runs entirely in your browser. + Row + Column … Read more →
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I Tested 4 Free Stock Market APIs — Here’s Which One Actually Works for Side Projects
Last month I needed real-time-ish stock quotes for a personal trading dashboard. Nothing fancy — just current prices, daily OHLCV, and maybe some basic fundamentals. I figured this would take an afternoon. It took a week, because every “free” market data API has a different definition of “free.” I tested Polygon.io,… Read more →