DEV Community: Jack Green

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

Jack Green — Tue, 08 Sep 2026 17:54:02 +0000

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

I was debugging a tricky API response late one evening. The JSON was a single unbroken line of 800 characters. I needed to read it.

So I opened Postman. Pasted the JSON. Hit format.

Except Postman's web UI isn't really built for this. You need an account just to use the basic features. And somewhere between "paste" and "format," my JSON was sitting on a remote server.

That's when I realized: formatting JSON should be as simple as opening a webpage and pasting. No account. No upload. No subscription.

So I built something better.

What this tool does

JSON Formatter & Validator runs 100% in your browser. No uploads. No accounts. No subscriptions.

Paste raw JSON or drag-and-drop a .json file
Click "Format" to pretty-print with your preferred indent (2, 4 spaces, or tabs)
Click "Validate" to check syntax — with line and column error locations
Click "Minify" to collapse to a single line
One-click copy to clipboard
Dark/light theme toggle for comfortable viewing
Works offline after the first load
Your data never leaves your device

Why this matters

Most online JSON tools follow the same playbook: free for a few uses, then pay up. Or require an account just to format a simple object. And between "paste" and "format," your JSON is uploaded to a remote server.

For sensitive data — API keys, tokens, user data, business logic — that's a real privacy problem.

This tool solves all three issues at once: it's free, private, and works offline.

Open and use it

No signup, no install, no tricks. Just open the tool, paste your JSON, and go.

Try the free JSON Formatter & Validator

I Built a Free Multi-Platform Social Media Scheduler (Because Hootsuite Charges $149/Year)

Jack Green — Tue, 08 Sep 2026 17:53:39 +0000

I Built a Free Multi-Platform Social Media Scheduler (Because Hootsuite Charges $149/Year)

Try it free: https://tools.jackgreen.top/app-f7bbf4b92f36/

I was managing social media for a small business and needed a scheduler. Hootsuite promised the perfect solution — schedule posts across multiple platforms from one dashboard. But then I saw the price: $149/year for the Professional plan.

$149. For a tool that basically puts your posts in a calendar.

And the worst part? Every post you write goes to their servers. Your content strategy, your brand voice — stored on someone else's machine. For a marketing tool, that's risky.

So I built something better.

Multi-Platform Social Media Scheduler runs 100% in your browser.

What you get:

Month-by-month calendar grid view
Click any day to add a post with platform selection (Facebook, Instagram, X/Twitter, LinkedIn, TikTok, YouTube)
Optional scheduled time per post
localStorage persistence — your data stays in your browser
Export as CSV or PDF (no server, no upload)
Works offline after first load
No account, no signup, no watermark

The app uses jsPDF for PDF export and localStorage for data — everything happens client-side. Your posts never leave your computer.

vs Hootsuite: $149/year for basic scheduling. vs Buffer: $144/year with only 10 posts/month on free. This is free.

Try the free Social Media Scheduler

Built for small businesses, solopreneurs, and anyone who wants to schedule social media without a subscription trap.

I Built a Free Markdown to HTML Converter (Because Dillinger Stores Your Content on Their Servers)

Jack Green — Tue, 08 Sep 2026 17:53:17 +0000

I Built a Free Markdown to HTML Converter (Because Dillinger Stores Your Content on Their Servers)

Try it free: https://tools.jackgreen.top/app-884065ab2700/

I was writing documentation in Markdown and needed to convert it to HTML. Dillinger.io came up as the top result — a free online Markdown editor. I pasted my content in, got my HTML back. Simple, right?

Except I didn't think about what happens to my content after I paste it. Dillinger stores it on their servers. Every document you type, every piece of documentation you write — it lives on their machine. For a tool that handles sensitive content, that's a non-starter.

So I built something better.

Markdown to HTML Converter runs 100% in your browser.

What you get:

Split-pane editor: write Markdown on the left, see rendered HTML on the right
Instant preview — no server round-trips
One-click download of your HTML file
Support for headings, bold, italic, lists, links, code blocks, blockquotes, horizontal rules
Standard HTML output — no lock-in, works in any editor or CMS
No signup, no account, no data collection
Your content never leaves your browser

The converter is entirely client-side JavaScript. There's no server, no database, no analytics. Your Markdown stays on your machine. The generated HTML includes a watermark comment you can strip out for your own use.

vs Dillinger: they store your content on cloud servers. You need an account to save documents. Our tool does everything in your browser — no account, no uploads, no vendor lock-in.

Try the free Markdown to HTML Converter

Built for developers, technical writers, and anyone who values privacy and wants their content to stay theirs.

I Built a Free Barcode Generator (Because Avery Charges $60/Year)

Jack Green — Tue, 08 Sep 2026 17:52:54 +0000

I Built a Free Barcode Generator (Because Avery Charges $60/Year)

Last year I was helping a friend list products on Etsy. She needed barcodes for her handmade candles — 12 UPC codes, one for each scent. She signed up for Avery, filled in her details, and hit "Download" — only to be greeted with a watermark and a paywall. $60 a year. For barcodes she could generate herself in 30 seconds.

I closed the tab. Opened a text editor. Built something better that afternoon.

The Problem

Barcode services like Avery, BarcodesInc, and others all follow the same playbook:

Let you generate barcodes for free (engaging, addictive)
Make you create an account (data capture)
Put a watermark on the free download (frustration)
Demand payment to remove it (rage quit)

It's a subscription trap disguised as a utility. And it preys on people at their most vulnerable — small sellers and crafters who just need barcodes to list their products.

What I Built

app-35708913a623 — a completely free, zero-signup, browser-based barcode generator.

No account. Open the page, type your code, download.
No watermark unless you want it. Free tier includes optional branding.
No payment. Ever. Not a "freemium" model, not a trial, just free.
No data collection. Everything runs in your browser. Your product data never touches a server.
Works offline. Once loaded, you don't even need internet.

Features

4 barcode types: Code 128, EAN-13, UPC-A, Code 39
Batch mode: Generate up to 100 barcodes at once
Label sheets: Print-ready PDF layouts for common label sizes (2"x1", 3"x1", 4"x2.5")
Live preview: See your barcode before you download
Privacy first: 100% client-side, no server processing

Why It Matters

Etsy sellers, craft fair vendors, small business owners — we're all expected to pay for everything. A barcode generator shouldn't be a cash grab. It should be a utility — like a ruler or a calculator.

The fact that this exists at all is kind of wild. You can download professional, print-ready barcodes, no strings attached, for zero dollars. No upsell. No "upgrade to premium." Just... done.

The Tech

Frontend: Vanilla HTML/CSS/JS — no framework needed
Barcode engine: JsBarcode (runs in-browser, client-side)
PDF generation: pdf-lib (client-side, no server)
Hosting: Static files on nginx

The whole thing is under 400 lines of code. That's it.

Try It

Try it: tools.jackgreen.top/app-35708913a623

Built because someone should have done this already. Now it exists.

Mission Candidate Selection Summary — Free Spigit Alternative

Jack Green — Tue, 08 Sep 2026 11:39:37 +0000

Mission Candidate Selection Summary — Free Spigit Alternative

Every jackgreen.top tool starts with a simple question: what do people actually need?

Our latest tool — the Mission Candidate Selection Summary — helps product and engineering teams review and compare mission candidates side-by-side. Think of it as a lightweight alternative to Spigit's $49/mo per-seat pricing, built for teams who want to move fast without handing over their data.

The Problem Both Apps Solve

Product teams juggle dozens of candidate ideas every quarter. Spigit and similar platforms promise organization, but they come with steep per-seat pricing, mandatory account creation, and the uncomfortable reality that your strategic candidate data lives on someone else's servers.

Most teams just use a spreadsheet — which means no version control, no collaboration, and no structured review process.

Our tool gives you the comparison workflow without the subscription lock-in.

Why This Exists

When a team is evaluating multiple mission candidates — new builds, feature fixes, exploration bets — they need to see everything side-by-side. The decision matrix matters more than any single candidate.

This tool lets you paste candidate JSON and instantly render a comparison view: approved vs rejected, with rationale clearly visible. No signup. No data leaves your browser. Works offline.

Built as a free alternative to Spigit and Productboard's expensive candidate management workflows.

Grow Revenue from Two Live Apps

Jack Green — Mon, 07 Sep 2026 18:22:35 +0000

Grow Revenue from Two Live Apps

Every jackgreen.top tool starts with a simple question: what do people actually need?

Two of our tools have been quietly making money — the Barcode & Label Generator (free, Code 128/EAN-13/UPC-A/Code 39) and the Invoice Payment Reminder Letter Generator ($9 one-time, no FreshBooks subscription required). Both are live, both work entirely in the browser, and both have proven demand.

This page is a cross-promotion hub. Instead of relying on each app to find the other on its own, we now bring both under one roof so visitors can discover them together.

The Problem Both Apps Solve

BarcodesInc charges $29/year for what we give away for free — and requires an account, a watermark on the free tier, and uploads your product data to their servers. Our barcode generator runs 100% client-side. Your data never leaves your browser.

FreshBooks costs $25–50/month for a full accounting platform when most sellers just need a professional payment reminder letter. Our tool generates those letters in seconds for a single $9 payment, or free for the demo. Again, nothing leaves your browser.

Why This Hub Exists

When someone lands on one of these tools, they should see the other. A seller generating barcodes for Etsy might also need to chase late-paying clients. A freelancer writing an invoice reminder might also need product barcodes.

No new features were built. No new payment flows. Just a simple reminder that both tools are live and solve real, everyday problems for free or near-free.

I Built a Free SVG to Icon Font Converter (Because IcoMoon Charges $29)

Jack Green — Mon, 07 Sep 2026 16:58:19 +0000

I Built a Free SVG to Icon Font Converter (Because IcoMoon Charges $29)

Try it free: https://tools.jackgreen.top/svg-to-icon-font-converter/

I was designing a website and needed a custom icon set. IcoMoon promised the perfect solution — convert SVG icons into a lightweight icon font. But then I saw the price: $29 one-time, or $9/month for their subscription.

$29. For a tool that basically takes SVGs and bundles them into a font file.

And the worst part? Every SVG you upload goes to their servers. Your designs, your work — stored on someone else's machine. For a design tool, that's insane.

So I built something better.

SVG to Icon Font Converter runs 100% in your browser.

What you get:

Drag & drop SVG icons directly into the browser
Live preview grid showing all your icons
Adjust font size, gap, and baseline settings
Download a .zip with TTF font + preview HTML + CSS class map
Auto-generated CSS class names from your file names
No account, no upload, no watermark
Works offline after first load

The tool uses opentype.js and JSZip — everything happens client-side. Your SVGs never leave your computer.

vs IcoMoon: $29 for basic functionality. This is free.

Try the free SVG to Icon Font Converter

Built for designers, developers, and anyone who wants custom icon fonts without the subscription trap.

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

Jack Green — Mon, 07 Sep 2026 16:21:31 +0000

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

I was debugging a tricky API response late one evening. The JSON was a single unbroken line of 800 characters. I needed to read it.

So I opened Postman. Pasted the JSON. Hit format.

Except Postman's web UI isn't really built for this. You need an account just to use the basic features. And somewhere between "paste" and "format," my JSON was sitting on a remote server.

That's when I realized: formatting JSON should be as simple as opening a webpage and pasting. No account. No upload. No subscription.

So I built something better.

What this tool does

JSON Formatter & Validator runs 100% in your browser. No uploads. No accounts. No subscriptions.

Paste raw JSON or drag-and-drop a .json file
Click "Format" to pretty-print with your preferred indent (2, 4 spaces, or tabs)
Click "Validate" to check syntax — with line and column error locations
Click "Minify" to collapse to a single line
One-click copy to clipboard
Dark/light theme toggle for comfortable viewing
Works offline after the first load
Your data never leaves your device

Why this matters

For sensitive data — API keys, tokens, user data, business logic — that's a real privacy problem.

This tool solves all three issues at once: it's free, private, and works offline.

Open and use it

No signup, no install, no tricks. Just open the tool, paste your JSON, and go.

Try the free JSON Formatter & Validator

I Built a Free Image to WebP Converter (Because Smallpdf Charges $15/Month)

Jack Green — Mon, 07 Sep 2026 15:53:33 +0000

I Built a Free Image to WebP Converter (Because Smallpdf Charges $15/Month)

I was trying to convert a few PNG screenshots to WebP for a website project. You know the drill — open Smallpdf, upload the file, download.

Except I hit a wall. Only 2 tasks per day on the free tier. And if I wanted more? $15/month.

That's ridiculous for something that should just work.

So I built something better.

What this tool does

Image to WebP Converter runs 100% in your browser. No uploads. No accounts. No subscriptions.

Drag and drop any image (PNG, JPG, GIF, BMP, SVG)
Optionally resize to custom dimensions
Adjust quality from 10% to 100% for optimal file size
Download as a single .webp file
Works offline after the first load
Your files never leave your device

Why this matters

Most online converters follow the same playbook: free for one or two tasks, then pay up. Or require an account just to use basic features. And somewhere between "upload" and "download," your files are sitting on a remote server.

For sensitive images — personal photos, work materials, product shots — that's a privacy problem.

This tool solves all three issues at once: it's free, private, and works offline.

Open and use it

No signup, no install, no tricks. Just open the tool, drop your image, and go.

Try the free Image to WebP Converter

I Built a Free YouTube Script & Chapter Builder (Because Descript+TubeBuddy Cost $240/Year)

Jack Green — Mon, 07 Sep 2026 13:44:10 +0000

I Built a Free YouTube Script & Chapter Builder (Because Descript+TubeBuddy Cost $240/Year)

Stop paying $15/month for Descript and $5/month for TubeBuddy when you just need to outline videos and add chapters.

I was tired of juggling two subscriptions just to plan a YouTube video and add timestamps. Descript charges $15/month for AI scripting with watermarks. TubeBuddy charges $5/month for chapter management tools. That's $240/year for features I only use occasionally.

So I built something better.

YouTube Script & Chapter Builder runs 100% in your browser.

What you get:

5 outline templates — Tutorial, Review, Vlog, Explainer, How-To
Auto-generated scripts — type your topic, get a structured outline in seconds
Chapter timestamp editor — add MM:SS timestamps with titles, validate and dedupe
Speaker notes export — combine outline + chapters into one document
PDF & TXT download — export your work in multiple formats
Real-time preview — see your chapters as you build them
Clean, fast, no-login interface
Works offline after first load
Free forever

No upload. No account. No subscription.

vs Descript: $15/month. vs TubeBuddy: $5/month. Combined: $240/year. This is free.

Try the free tool

Built for YouTubers who need to plan and chapter videos without the subscription bloat.

Tags: youtube, video, creator-tools, script, outline, chapters, free-tool, descript-alternative

The post appeared first on JackGreen Tools.

I Built a Free YouTube Title Generator (Because TubeBuddy Charges $13/month)

Jack Green — Mon, 07 Sep 2026 13:30:41 +0000

I Built a Free YouTube Title Generator (Because TubeBuddy Charges $13/month)

Stop paying $13 per month for TubeBuddy when you just need help writing better YouTube video titles.

I was tired of TubeBuddy's pricing model — $12.99/month for a browser extension that basically just gives you a title score and a few suggestions. For creators who upload occasionally, that's ridiculous. And YouTube Studio's built-in title field? No help, no suggestions, no character counter.

So I built something better.

YouTube Title Generator runs 100% in your browser.

What you get:

Generate 5+ title suggestions from a single topic input
Choose from 5 styles: How-To, Question, List, Shock/Clickbait, Straightforward
Real-time character counter (green/yellow/red indicators)
One-click copy to clipboard
Each title includes a tip explaining why it works
SEO-optimized patterns with power words and urgency triggers
Clean, fast, no-login interface
Works offline after first load
Free forever

No upload. No account. No subscription.

vs TubeBuddy: $12.99/month. vs YouTube Studio: zero help. This is free.

Try the free demo

Built for YouTubers who need great titles without the subscription.

Tags: youtube, video, creator-tools, titles, free-tool, tubebuddy-alternative

The post appeared first on JackGreen Tools.

Free YouTube Channel Trailer Generator (Because TubeBuddy Charges $10/Month)

Jack Green — Mon, 07 Sep 2026 13:30:19 +0000

Free YouTube Channel Trailer Generator (Because TubeBuddy Charges $10/Month)

You're a YouTuber. Your channel trailer is the first thing new visitors see.

So you look for tools to make one. TubeBuddy, VidIQ, Canva — they all cost $10–$13/month. That's $120–$156 a year just to create a channel trailer.

The Problem

TubeBuddy charges $9.99/month for basic channel trailer tools. But even paid tools either add watermarks, restrict customization, or require you to create an account and hand over your data.

You need a professional-looking trailer — fast, free, and private.

The Solution

I built a free, browser-based YouTube Channel Trailer Generator that lets you create professional channel trailers with:

4 template presets (Gaming, Vlog, Education, Business)
Full customization — colors, fonts, text, layout
No watermark on exports
No signup required
100% client-side — your designs never leave your device

Try it now: https://tools.jackgreen.top/youtube-channel-trailer-generator-as-a-tubebuddy-alternative/

How It Works

It's a single HTML file. No signup. No account. No data uploads.

Open the tool in your browser
Choose a template preset (Gaming, Vlog, Education, or Business)
Customize your background color/gradient
Add your title, subtitle, and call-to-action text
Pick your font family and size
Download a high-quality PNG preview (1280x720)

That's it. No dashboard, no learning curve, no subscription.

Features

4 professional templates — each with its own color palette and font style
Full color customization — solid colors or two-color gradients with angle control
Custom text — title, subtitle, and CTA with adjustable font size
4 font families — Inter, Playfair Display, Bebas Neue, Oswald (via Google Fonts)
Two layout options — centered full-bleed or left-aligned hero style
High-quality PNG export — 1280x720 standard YouTube resolution
No watermark — clean exports, unlike competitors
No signup — open and go immediately
100% client-side — your designs never leave your device
Works offline — after the page loads, no internet required
30-day satisfaction promise — free forever, no catch

Comparison: This Tool vs TubeBuddy

Feature	This Tool	TubeBuddy
Price	Free forever	$9.99/month ($119.88/year)
Watermark	None	Watermarked on free tier
Account required	No	Yes
Templates	4 presets	Limited
Customization	Full control	Restricted
Data privacy	100% client-side	Server processing
Offline use	Yes	No
Export quality	1280x720 PNG	Standard

Who Is This For?

YouTubers who want a professional channel trailer without paying $10/month
Content creators who value privacy and don't want to create accounts
Anyone who wants full creative control over their channel's first impression
Small channel owners who can't justify a $120/year subscription

Built With

This tool is built entirely in the browser using vanilla JavaScript and the Canvas API. No server-side processing, no data collection, no tracking. Your channel trailer designs stay on your device — always.

No Google Analytics. No tracking cookies. No data collection. Just a free tool that respects your privacy and your wallet.

DEV Community: Jack Green

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

What this tool does

Why this matters

Open and use it

I Built a Free Multi-Platform Social Media Scheduler (Because Hootsuite Charges $149/Year)

I Built a Free Multi-Platform Social Media Scheduler (Because Hootsuite Charges $149/Year)

What you get:

I Built a Free Markdown to HTML Converter (Because Dillinger Stores Your Content on Their Servers)

I Built a Free Markdown to HTML Converter (Because Dillinger Stores Your Content on Their Servers)

What you get:

I Built a Free Barcode Generator (Because Avery Charges $60/Year)

I Built a Free Barcode Generator (Because Avery Charges $60/Year)

The Problem

What I Built

Features

Why It Matters

The Tech

Try It

Mission Candidate Selection Summary — Free Spigit Alternative

Mission Candidate Selection Summary — Free Spigit Alternative

The Problem Both Apps Solve

Why This Exists

Links

Grow Revenue from Two Live Apps

Grow Revenue from Two Live Apps

The Problem Both Apps Solve

Why This Hub Exists

Links

I Built a Free SVG to Icon Font Converter (Because IcoMoon Charges $29)

I Built a Free SVG to Icon Font Converter (Because IcoMoon Charges $29)

What you get:

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

I Built a Free JSON Formatter (Because Postman's Web UI is Clunky)

What this tool does

Why this matters

Open and use it

I Built a Free Image to WebP Converter (Because Smallpdf Charges $15/Month)

I Built a Free Image to WebP Converter (Because Smallpdf Charges $15/Month)

What this tool does

Why this matters

Open and use it

I Built a Free YouTube Script & Chapter Builder (Because Descript+TubeBuddy Cost $240/Year)

I Built a Free YouTube Script & Chapter Builder (Because Descript+TubeBuddy Cost $240/Year)

What you get:

I Built a Free YouTube Title Generator (Because TubeBuddy Charges $13/month)

I Built a Free YouTube Title Generator (Because TubeBuddy Charges $13/month)

What you get:

Free YouTube Channel Trailer Generator (Because TubeBuddy Charges $10/Month)

Free YouTube Channel Trailer Generator (Because TubeBuddy Charges $10/Month)

The Problem

The Solution

How It Works

Features

Comparison: This Tool vs TubeBuddy

Who Is This For?

Built With