YFIN Code is a digital code marketplace selling 30 ready-to-use code packs across 5 categories: Chrome extensions, VS Code extensions, HTML/JS tools, WordPress plugins, and Tampermonkey userscripts. All purchases are made with $YFIN token (BEP-20 on BNB Smart Chain).

How do I install the Chrome extensions?

Download the ZIP file, extract it, then go to chrome://extensions in your browser, enable Developer mode, click Load Unpacked, and select the extracted folder. The extension is active immediately — no Chrome Web Store required.

How do I install VS Code extensions (.vsix)?

Open VS Code, go to the Extensions panel (Ctrl+Shift+X), click the ··· menu, select Install from VSIX, and pick the .vsix file. Works with VS Code, Cursor, and VSCodium. You can also run: code --install-extension filename.vsix

What is the $YFIN burn mechanic?

When you buy any code pack, 30% of the YFIN payment is sent to the burn wallet (0x000...dEaD) and permanently destroyed. The remaining 70% goes to the treasury. This reduces $YFIN supply with every purchase, making it deflationary.

What is the $YFIN token contract address?

The $YFIN token contract on BNB Smart Chain is: 0xF576bcFac0fefc2119f8b119e3a1ac1505F2FD45. Verify on BscScan: https://bscscan.com/token/0xF576bcFac0fefc2119f8b119e3a1ac1505F2FD45

Do the HTML/JS tools work offline?

Yes. All HTML/JS tools are self-contained — open index.html in any browser with no internet connection required. No server, no CDN, no external dependencies. Works forever after download.

Store›Blog›HTML / JS Tools

HTML / JS Tools5 min read2026-07-15

Build a Productivity Stack with Offline HTML/JS Tools

No internet? No problem. These 10 HTML/JS tools work entirely in your browser — calculator, expense tracker, Markdown editor, password generator, invoice maker, and more.

htmljavascriptofflineproductivityno install

Why Offline-First Tools Matter

Cloud tools go down. Subscriptions expire. YFIN Code HTML/JS tools run entirely in your browser — no server, no account, no internet after download. Buy once, use forever.

Your Offline Productivity Stack

1. Multi-Purpose Calculator (#09)

Basic, scientific, unit conversion. All three modes in one file. Full keyboard support.

2. Countdown Timer (#10)

Visual progress ring. Audio alert. Auto-repeat mode. Perfect for Pomodoro-style work without a Chrome extension.

3. To-Do List App (#11)

localStorage-backed tasks. Filter by All / Active / Done. Never lose your list between sessions.

4. QR Code Generator (#12)

Generate QR from any text or URL. Custom colors and size. Download as PNG. No API calls.

5. Password Generator (#13)

Cryptographically secure. Control length (8–64), character types, strength meter. One-click copy.

6. Unit Converter (#14)

Length, weight, temperature, volume. Instant bidirectional results as you type.

7. Invoice Generator (#15)

Professional invoices: client info, line items, tax, total. Export to PDF with bundled jsPDF.

8. Markdown Preview Editor (#25) — New

Split-pane live preview. Export to HTML. GFM-compatible. Zero dependencies.

9. Expense Tracker (#26) — New

Categories, monthly chart, running balance. All data in localStorage.

10. Color Palette Picker (#27) — New

Color wheel, HEX/RGB/HSL copy, CSS variables export. Designers love this one.

All tools: open index.html in any browser — that's it. Price: 143,400 YFIN each (~$2.00).

Ready to buy with $YFIN?

Connect your wallet, pay 143,400 YFIN (≈ $2.00), and download instantly. 30% burned permanently on every purchase.

Browse All Code Packs →

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