About Convert369

Every Tool. One Place.

Convert369 started as a small experiment: a single CSV-to-JSON converter, built to solve a repetitive task without opening a spreadsheet app or signing up for yet another SaaS tool. It grew from there, one tool at a time, into a toolbox of 36+ free converters, generators, and calculators that all share the same idea: everyday file and data tasks shouldn't require an account, a subscription, or trusting a stranger's server with your files.

What we believe

Most online converters ask you to upload your file to a server, wait, and hope it gets deleted afterward. We think that's backwards for the kind of everyday tasks people actually need, converting a CSV, formatting some JSON, splitting a spreadsheet, comparing two text files. Convert369 runs every one of these operations directly inside your browser using JavaScript. Your file never travels anywhere. There's no upload progress bar because there's no upload.

What's in the toolbox

The tools are grouped into a few categories that cover most of the conversions people search for day to day:

• CSV & Excel, convert, clean, and split spreadsheet data.
• Data Converters, JSON, XML, YAML, and JSONL, in any direction.
• Excel & PDF, turn spreadsheets and text into polished, print-ready documents.
• ZIP & More, compress, extract, and compare files.
• Number & Unit, length, weight, temperature, speed, percentages, and more.

New tools are added as they come up, usually because a real, repetitive task needed a faster answer than digging through a spreadsheet app or writing a one-off script.

How it works, technically

Every conversion on this site runs client-side, meaning the JavaScript in your browser does the actual parsing, transforming, and formatting. Nothing you upload or paste is sent to a server, logged, or stored anywhere outside your own device. You can read exactly how each tool handles data on our Privacy Policy page.

Free, and staying that way

Every tool on Convert369 is free to use, with no sign-up, no watermarks, and no artificial limits designed to push you toward a paid plan. The site may show ads to help cover hosting costs, but the tools themselves will always be free.

Get in touch

Found a bug, have a tool idea, or just want to say hi? Visit the Contact page, we read every message.