Write and preview Markdown in real time with this free online editor. See your formatted output instantly as you type. Supports headings, bold, italic, code blocks, lists, links, and more. No signup required. How to Use Type Markdown in the left panel See the live preview render in the right panel Click Copy HTML… Read more →
Security, DevOps & Trading Tech — Practical Guides
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Free Unix Timestamp Converter Online — Convert Epoch Time Instantly
Convert Unix timestamps (epoch time) to human-readable dates and back with this free online converter. Supports seconds and milliseconds. See the current timestamp updating in real time. How to Use Timestamp → Date: Enter a Unix timestamp to see the full date in UTC, local time, and ISO format Date → Timestamp: Pick… Read more →
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Free Cron Expression Builder & Validator Online — Generate Cron Schedules Instantly
Build cron expressions visually with this free online cron schedule builder. See a human-readable description and the next 5 scheduled run times in real time. Perfect for setting up crontab jobs, Kubernetes CronJobs, or GitHub Actions schedules. How to Use This Cron Builder Edit the 5 fields (minute, hour, day of month,… Read more →
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How I Built a Free Real-Time Stock Alert System with Finnhub WebSockets
Last month I got burned. I set a limit order on NVDA at $118, went to make coffee, and came back to find it had dipped to $117.40 and bounced back to $122 in under three minutes. My broker’s mobile notification arrived 47 seconds late. That’s when I decided to… Read more →
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Best TinyPNG Alternatives in 2026 (Free & Privacy-First)
Looking for a TinyPNG alternative that’s free, private, and doesn’t require uploads? Here are the best options in 2026 — including one that compresses images entirely in your browser. Why Look Beyond TinyPNG? TinyPNG is great, but it has limitations: Free tier limited to 20 images/month via API (500 via web) Files are uploaded… Read more →
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QuickShrink Pro: Unlimited Private Image Compression — $4.99/month
QuickShrink Pro — Unlimited Image Compression Compress images instantly in your browser. No uploads. 100% private. Try QuickShrink Free Free vs Pro Feature Free Pro $4.99/mo Single image compression ✅ ✅ Format conversion ✅ ✅ Batch processing (50 images) ❌ ✅ API access ❌ ✅ CLI tool ❌ ✅ Daily limit 5/day Unlimited Get QuickShrink Pro — $4.99/month Why QuickShrink? 🔒 100% Private — Unlike TinyPNG, images never leave your browser. ⚡ Instant — No server processing. Modern… Read more →
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How to Scan Docker Images for Vulnerabilities with Trivy (Free, 5 Minutes)
Last month I pulled a random Node.js base image for a side project and ran Trivy against it out of curiosity. 47 CVEs. Twelve of them critical. The image had been on Docker Hub for two years with 10M+ pulls. Nobody checks these things. If you’re running containers — homelab, production,… Read more →
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How to Convert Images to WebP Online (Free, No Upload Required)
WebP is the modern image format that delivers 25-35% smaller files than JPEG and PNG with no visible quality loss. Google created it, Chrome and Safari support it, and if you’re building for the web in 2026, you should be using it. But how do you convert your existing images to… Read more →
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How to Compress Images Online for Free (Without Losing Quality)
Need to compress images for your website, email, or social media? Large image files slow down page loads, eat up storage, and frustrate users. The good news: you can dramatically reduce file sizes without visible quality loss — and you don’t need to install anything. In this guide, we’ll cover the… Read more →
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Dangerzone: Open-Source Document Sanitization That Actually Works
Last month I received a PDF from a vendor that triggered three different AV signatures. The file was “clean” — just a contract — but it had embedded JavaScript, an auto-open action, and metadata pointing to an internal network share. The vendor had no idea. This is the reality of… Read more →