Every time you upload a CSV or an image to a "free online tool," your data goes to someone's server. You have no idea what happens to it.
I built 3 browser tools that do the job entirely on your computer. Zero uploads. Zero servers. 100% private.
🛠 The Tools
1. CSV → JSON Converter
Convert CSV to JSON instantly. Handles quoted fields, escaped commas, and auto-detects number types.
👉 Try it free
2. Bulk Image Resizer
Resize multiple images at once — JPG, PNG, WebP output. Contain/cover/exact modes. All local.
👉 Try it free
3. ChatGPT Prompt Library
50 free prompt templates for real estate agents, small business owners, and content creators.
👉 Try it free
Why Browser-Native?
| Feature | Online Tool | Our Tool |
|---|---|---|
| Privacy | ❌ Uploaded to server | ✅ Stays on your machine |
| Speed | ❌ Server round-trip | ✅ Instant, no network |
| Limits | ❌ File size caps | ✅ Browser's memory limit |
| Offline | ❌ Requires internet | ✅ Works offline |
| Cost | ❌ Often freemium | ✅ Actually free |
The Tech
All three tools use zero dependencies. Pure vanilla JavaScript:
- CSV Parser — Hand-written state machine for CSV parsing (no PapaParse needed)
- Image Resizer — Canvas API for client-side image manipulation
- Prompt Library — Static HTML, SEO-optimized
No React. No npm. No build step. Each page is a single .html file under 10KB.
Want CLI Versions?
The browser tools are free forever. If you need batch processing and automation, the CLI versions are on Gumroad:
- JSON↔CSV Converter CLI — $4.99
- Bulk Image Resizer CLI — $4.99
- 50 ChatGPT Prompts for Real Estate — $9
What's your go-to "I don't trust that website" tool? Drop it in the comments.
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