CSV ↔ JSON Converter

Convert CSV tables to JSON and back

Transform spreadsheet exports into JSON arrays for APIs and scripts, or export JSON back to CSV for Excel. Handles headers, delimiters, and quoted fields. CSV ↔ JSON Converter on Fneno helps you convert csv tables to json and back with a clean, mobile-friendly interface. Runs in your browser with strong privacy — your code and data are not stored on our servers for typical use. Used by front-end, back-end, and DevOps professionals who need fast utilities without installing software. Fneno.com is a free bilingual online toolkit — open the tool and start instantly with no signup for normal use. Runs entirely client-side in the browser — zero server upload, maximum privacy for your code and data. Free developer tool with no account required — copy results in one click, share via URL. Trusted by front-end developers, back-end engineers, sysadmins, and DevOps teams worldwide. Works on Windows, macOS, and Linux — any device with a modern browser.