I Built a Free CSV Toolkit That Runs Everything in Your Browser (No Signups)

TL;DR: You can run SQL on CSVs, ask questions in plain English, compress massive CSVs, analyze JSONPaths, generate basic stats, and even train ML models — all in-browser, with zero data ever leaving your machine.
🎯 Try it → CSVToolsOnline.com

🤕 Why I Built This
I was tired of jumping between tools just to answer basic data questions like:

• “What’s the total revenue by region?”
• “Can I run a quick JOIN on two CSVs?”
• “How do I test this JSONPath expression?”
• “Can I compress this CSV before uploading to GitHub?”

I didn’t want to trust shady web tools.
I didn’t want to install anything.
So I built a suite that does all of this in one place — in your browser.

🧰 What the Toolkit Includes
Here’s everything that’s live today (and yes, I’m adding more weekly):

🧠 Natural Language Query on CSV
Ask: “Which department has the highest budget?”
Get: An actual answer — no SQL needed.

🧮 Run SQL on Your CSVs
SELECT * FROM yourfile.csv WHERE region = ‚West‘
Yep. That works.

🔗 Join Multiple CSVs (Like SQL JOINs)
Left joins. Inner joins. Done right in your browser.

📊 Generate Charts from CSV
Drag a column → choose chart type → done.

🤖 Train ML Models with No Code
Upload → select features → get predictions.
No Python, no TensorFlow, no installs.

🔁 Conversion Tools (CSV ⇄ JSON ⇄ YAML ⇄ SQL)
Just clean, fast, no-upload data converters.

📏 Basic Stats from CSV
Instantly get count, mean, median, mode, std-dev, min/max on any column.

🧵 Compress Large CSV Files
Shrink your CSVs without breaking formatting — perfect before upload.

🧪 Test JSONPath Expressions Easily
Just paste your JSON and start querying it.
No need to guess and hope it works.

CSV diff tool

🔐 100% Privacy-First
Want proof?
Open DevTools → Network tab → Upload a file →

You’ll see ZERO network requests. Everything runs locally in your browser. 🔒

No logs. No tracking.

💬 Built for Developers, Analysts & Data Nerds
This suite is for:

Devs who don’t want to spin up a database for every data task

Analysts tired of Excel freezing up on big files

Students learning SQL, data prep, and ML

Folks who love having all their tools in one clean place

🔗 Try the Full Toolkit Here
👉 https://csvtoolsonline.com/tools

❤️ Feedback = Fuel
If you try it and love it, let me know.
If you try it and hate it, also let me know. 😅
Ideas? Features? Bugs? Roast my UI. I can take it.

🧪 Try the suite → https://csvtoolsonline.com