Code Review Validator — free browser tool for developers
Code Review Validator: Automate Feedback, Improve Code Quality I built a tool to help developers give better code reviews — faster. It’s called Code R…
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Free Shopify Alternatives I Actually Set Up for Real Stores (Not Just Tested in a Sandbox)
TL;DR: The $39/month Basic plan isn't actually your problem. The problem is what happens three weeks after launch when you realize abandoned cart emai…
The Ultimate Guide to Free APIs Every Developer Should Know About
The Ultimate Guide to Free APIs Every Developer Should Know About As developers, we're often tasked with building applications that require data from …
Free Project Management Tools I Actually Use to Run Volunteer Teams (Asana Alternatives That Don't Require a Budget)
TL;DR: I ran a volunteer onboarding project for a mid-sized nonprofit and we blew past Asana's free tier limit inside the first weekend of signups. Th…
Turning email and cron into webhooks
I had two small problems that kept coming back in side projects: I wanted an email address that would call my webhook I wanted a cron job that would c…
JSON Formatting: Why It Matters and How to Read Any JSON Response Instantly
JSON is everywhere. It is the default format for REST APIs, configuration files, database exports, and inter-service communication. Yet most developer…
Deep Dive into Open Agent SDK (Part 2): Behind the 34 Built-in Tools
The previous article analyzed how the Agent Loop works, including one crucial step: "execute tools." When the LLM says "I need to call Bash," the SDK …
10 Best Free APIs Every Developer Should Know in 2024
10 Best Free APIs Every Developer Should Know in 2024 If you're building side projects, prototypes, or even MVPs, free APIs are your best friend. They…
URL Encoding Explained: Why %20 Appears in URLs (and How to Decode It)
You paste a URL into your browser and it looks like this: https://example.com/search?q=hello%20world&filter=price%3E100 What are all those %20 and…
Top 3 AI Tools for Developers This Week
Issue #1 | April 28, 2026 Welcome to LearnAI Weekly This newsletter is for developers who want to stay ahead without drowning in AI hype. What you'll …
I Built a Free UptimeRobot Alternative That Runs Entirely in Your Browser
I Built a Free UptimeRobot Alternative That Runs Entirely in Your Browser (No Sign-Up) I wanted to check if a website was down without handing my emai…
Unix Timestamps Explained: Why Computers Count From January 1, 1970
If you've ever called Date.now() in JavaScript, queried a database, or inspected an API response, you've seen a Unix timestamp. Something like 1745488…
ChatGPT API on Shopify for Customer Support: Setup to Production (With the Gotchas I Hit)
TL;DR: Here's what a messy Shopify support queue looks like in practice: 200 tickets come in on a Monday, and when you actually categorize them, about…
PNG to JPG vs WebP: Which One Should You Actually Use in 2026
The quick answer If you landed here looking for a one-line verdict, here it is: convert PNG to WebP, not JPG, in 2026. WebP produces smaller files tha…
Merge PDFs Privately: No Upload, No Adobe [2026 Guide]
The privacy problem with online PDF mergers Search merge PDF online and the top ten results are all variations of the same architecture: you drop file…
WhatsApp Image Quality Loss? Fix It Before Sending [2026]
WhatsApp Image Quality Loss? Fix It Before Sending [2026] How WhatsApp compresses your images. Every time you send a photo through WhatsApp as a regul…
How to Create an Interactive Travel Photo Map from Your iPhone Photos
How to Create an Interactive Travel Photo Map from Your iPhone Photos Your iPhone is quietly mapping every photo you take Open any photo on your iPhon…
UUID v4 vs UUID v7: Which Should You Use in Your Database?
UUID v7 was ratified in May 2024 as part of RFC 9562. If you haven't heard about it yet, you're not alone — but you should have, because it solves a r…
Best Image Optimizer for Mac
Every developer has been there. You export assets from Figma, drop them into your project, push to production, and Lighthouse hits you with that red s…
Best BPMN Tools in 2026: 10 Modeling Platforms Compared
Not every tool that has BPMN shapes produces valid BPMN. Some generate standards-compliant XML that process engines can execute. Others draw pretty pi…
7 Best Free Image Optimization Tools Online (2026 Comparison)
7 Best Free Image Optimization Tools Online (2026 Comparison) Why image optimization matters in 2026 Images account for roughly 50% of the total bytes…
AI Tools That Actually Pay You Back: A Developer's Guide to Monetizing Machine Learning
AI Tools That Actually Pay You Back: A Developer's Guide to Monetizing Machine Learning ==============================================================…
How to Write a Business Continuity Plan with AI: Step-by-Step Prompts and Tools (2026)
Most small businesses don't have a business continuity plan. Not for lack of risk — for lack of a realistic process to create one. The standard BCP gu…
The Merging Take Is Too Early
Everyone is calling for AI coding tools to consolidate. We are not in the merging phase — we are in the explosion phase. Calling for consolidation rig…
Best Terminal for Mac in 2026: Ghostty, Kitty, WezTerm, Alacritty, Warp & More
This post was originally published on vibehackers.io . Your terminal is the one tool you use more than your editor. Every git push , every npm install…
82 Free Developer Tools That Run in Your Browser — The Complete List
I have been building a collection of free developer tools at theappsfirm.com/tools . Every tool runs 100% in your browser — no signup, no server uploa…
How to Remove EXIF Data and Protect Your Privacy
What is EXIF data? EXIF stands for Exchangeable Image File Format. It is a standard for embedding technical metadata directly inside digital image fil…
HEIC to WebP Converter: Why You Should Skip JPG in 2026
Why every iPhone shoots HEIC by default. Apple introduced HEIC, or High Efficiency Image Container, as the default photo format with iOS 11 and the iP…
Compress Images Without Losing Quality (2026)
Why image compression matters more than ever in 2026. Google uses page loading speed as a direct ranking signal through its Core Web Vitals framework.…
Browser-Based Image Tools: The Complete Privacy Guide (2026)
Key Takeaway Browser-based image tools are the only category of online image editors where your files provably never leave your device. This is not a …