DEV Community: Majed Ben mansour

Stop wasting tokens debugging your API keys. I built a free AI API Tester.

Majed Ben mansour — Fri, 21 Aug 2026 12:59:24 +0000

If you use Janitor AI, SillyTavern, or build AI apps, you know the exact pain point: you get a new API key from a third-party provider (OpenRouter, a proxy, etc.), you paste it into your app, and... nothing happens.

Did the key fail? Is the Base URL wrong? Did you typo the model name? You end up wasting 20 minutes and a bunch of tokens just trying to get a "Hello World" response.

To solve this, I built AI API Tester.

It's a completely free, dark-mode web utility. You paste your Base URL, your API Key, and the Model Name. The backend sends a 1-token request to your endpoint and instantly tells you if it's working.

Try it out here: https://apitester123.netlify.app/

How it works:
-Frontend: Vanilla HTML/JS with a clean, dark-mode UI.
-Backend: Python with FastAPI.
-Networking: Uses httpx to send an async POST request to your {base_url}/chat/completions endpoint with a max_tokens: 1 payload.
It formats the errors nicely too—if your key is dead, it tells you 401: Invalid API Key. If your URL is wrong, it tells you 404: Not Found.

It's 100% free. If it saves you 10 minutes of debugging, there's a "Buy me a coffee" link at the bottom. Let me know what other features would be useful.

I was overthinking a text to my crush, so I built an AI to roast me instead

Majed Ben mansour — Tue, 18 Aug 2026 17:16:59 +0000

We've all been there. You stare at your phone for 20 minutes, typing and deleting a text message, wondering if you sound desperate or chill.

So, instead of just sending it, I built Should I Send It? (TextRoast AI).

It's a simple mobile-first web app. You paste the text you want to send, tell the AI who it's going to (Crush, Boss, Ex, Friend), and hit "Roast Me".

Try it out here: https://airoaster-7qxs.onrender.com/

How it works:
-Frontend: Vanilla HTML/JS with a dark-mode, mobile-first PWA design.
-Backend: Python with FastAPI.
-AI: The gpt-oss-20b model via the Groq API.

I gave the AI a system prompt to act like an "unhinged, brutally honest Gen-Z friend." It gives you a brutal roast and a Confidence Score out of 10.

Free tier: 3 roasts a day.
Pro tier ($3): Unlocks unlimited roasts and an "AI Rewrite" feature that fixes your messy texts to sound confident.

What's the worst text you've ever sent? Drop it in the comments and I'll tell you what the AI would have said!

ColdMail AI - a tool that helps you write cold emails.

Majed Ben mansour — Tue, 18 Aug 2026 08:42:02 +0000

I got tired of spending 30 minutes researching a company before writing a single cold email. So I built ColdMail AI.

It's a simple web app where you upload a CSV of company names and websites. The backend (Python/FastAPI) scrapes the homepage text, sends it to Groq's AI, and writes a hyper-personalized, 30-word opening sentence for each company.

Try it out here: https://aimail-32ii.onrender.com/

How it works:

You upload a CSV with company_name and website columns.
Python uses BeautifulSoup to scrape the visible text from the homepage.
It sends the text to the gpt-oss-20b model via the Groq API.
The AI writes a catchy, specific opening sentence.

Pricing:

Free: Generates 3 intros per CSV so you can test it.
Pro ($10): Unlocks 50 intros per CSV and lets you download the finished file.

Turn any CSV file into an instant REST API (No backend setup required)

Majed Ben mansour — Sat, 08 Aug 2026 13:59:44 +0000

As frontend developers, we often just need some fake JSON data to build our UI. But setting up a Node server, connecting a database, and deploying it takes time.

I decided to solve this problem and built InstantCSV API.

How it works:
-Export your data as a .csv file.
-Upload it to: https://instantcsv-api.onrender.com/
-Get an instant API URL like https://instantcsv-api.onrender.com/api/your-id
Features:
-Instant JSON conversion
-Built-in pagination (?limit=10&offset=20)
-CORS enabled (works directly from the browser)

The Tech Stack:
-Backend: Python + FastAPI (incredible for fast API development)
-Data Processing: Pandas
-Storage: SQLite

It's free to use for up to 100 rows. If you need to test POST/PUT/DELETE requests or need up to 10,000 rows, there's a $6 lifetime Pro unlock.

Check it out here: https://instantcsv-api.onrender.com/

Any suggestions or feedback are welcome.

TunisiaTrip — Travel Budget Calculator & Planner

Majed Ben mansour — Wed, 05 Aug 2026 20:18:32 +0000

TunisiaTrip is a premium, client-side web application designed to help international tourists plan realistic travel budgets for their holiday in Tunisia.

It is completely serverless, zero-config, has no external API dependencies, and runs 100% locally in the browser. You can simply drag and drop the folder onto Netlify, Vercel, or GitHub Pages, and it works immediately.

Site:https://tunisiatravel.netlify.app/
Github repo:https://github.com/MaxelXA/TunisiaTravel

RamadanPro — Ramadan 2027 Companion & Islamic Web Tools

Majed Ben mansour — Wed, 05 Aug 2026 18:08:48 +0000

RamadanPro is a modern, lightweight, privacy-focused, serverless web application designed to serve as a complete companion for Ramadan 2027 and the Islamic Hijri year.

Built with pure client-side technologies (HTML5, Vanilla CSS, JavaScript), it requires no backend server, database, or API keys. Everything runs fast, smoothly, and privately directly in the user's browser.

Try it here: https://ramadanpro.netlify.app/
Github repo: https://github.com/MaxelXA/Ramadanpro

📺 TubeMeta — YouTube Video Metadata & Thumbnail Analyzer

Majed Ben mansour — Wed, 05 Aug 2026 18:06:55 +0000

TubeMeta is a free, 100% client-side web tool that lets you instantly analyze any YouTube video URL to extract public metadata and download high-resolution thumbnails. No API keys, no signups, no server — everything runs directly in your browser.

Try it here:https://analyzertub.netlify.app/
Github repo:https://github.com/MaxelXA/Metatube

BGClean — 100% Client-Side Background Remover

Majed Ben mansour — Wed, 05 Aug 2026 18:00:50 +0000

BGClean is a premium, fully client-side web application designed to remove image backgrounds instantly and privately. Built specifically for e-commerce sellers (Amazon, Etsy, eBay, Shopify) and graphic designers, BGClean processes images 100% in the browser. Your photos never leave your device—there are no server uploads, no signups, no API keys, and no watermarks.

Try here:https://app.netlify.com/projects/bckgroundremove/

Github repo:https://github.com/MaxelXA/Background-remover

Resume / Portfolio Site - Make your own Resume/Protfolio for free in few clicks.

Majed Ben mansour — Wed, 05 Aug 2026 15:51:08 +0000

A print-perfect, dark-mode, accessible resume site.
Allows you to create any Portfolio/CV however you like.

Edit one JSON object and the entire site re-renders. Deploy to GitHub Pages in 3 clicks. Looks like $500 of freelance work.
Try out: https://resume-site.majedaxel.workers.dev/
Github repo:https://github.com/MaxelXA/resume-site

JWT Inspector

Majed Ben mansour — Wed, 05 Aug 2026 15:49:00 +0000

Decode, inspect, and verify JSON Web Tokens — 100% in your browser. No token ever leaves your device.

Every web developer has pasted a JWT into some random website to see what's inside it. That's a security risk — those sites may log your tokens. This tool runs entirely on your machine: open the file, paste your token, read the contents. Nothing is sent anywhere.
Try:https://jwt-inspector.majedaxel.workers.dev/
Github repo:https://github.com/MaxelXA/JWT-Inspector

Cron Translator - a website tool that runs 100% in your browser

Majed Ben mansour — Mon, 03 Aug 2026 12:09:34 +0000

As the title suggests, this allows you to manage, control and understand the Cron expression better.
Cron is powerful but famously unreadable (0 9 * * 1-5 is gibberish until someone tells you it means "every weekday at 9am"). This tool makes it legible both ways.
Website: https://cron-translator.majedaxel.workers.dev/
Github: https://github.com/MaxelXA/Cron-Translator

JSON studio - A complete JSON toolbox

Majed Ben mansour — Sun, 02 Aug 2026 15:47:29 +0000

This is a bunch of tools and utilities for JSON, allows you to convert it, compress it, encode it, decode it, etc..for a total of 12 operations.

Toolbox:https://json-studio.majedaxel.workers.dev/
Github repository:https://github.com/MaxelXA/json-studio

Any feedback is welcome.