Turn CSV tables into JSON. It is converted in your browser, so the file never leaves your device.
Drop CSV files here
or choose from your computer paste with Ctrl V
from Photos or Files
Ready · other file types work too0 bytes uploaded, ever
Drop CSV files onto the box above, or click it to choose them. ToAny reads the file's contents to detect the type, so a wrong extension does not matter.
Press Convert. There is nothing else to set. The work happens in this tab.
Save the JSON, or download everything as one ZIP if you converted several files.
The CSV to JSON converter is part of this page and runs inside your browser. Your spreadsheets are never sent to ToAny or to anyone else.
Nothing has to travel to a server and back, so the conversion starts the moment you press Convert, even on a slow connection.
No sign-up, no email address and no watermark. Add several files and download them together as a ZIP.
Web apps, APIs and scripts work with JSON rather than rows of text. Converting a CSV gives you a list of objects, one per row, keyed by the header row. CSV has no data types, so decide whether values such as 007 should end up as numbers or as text.
The first row is read as column names, and every row after it becomes one object, keyed by those names. A header such as address.city is turned back into a nested address with a city. Numbers and true/false in the cells are written as real numbers and booleans, but values such as ZIP codes with a leading zero, phone numbers and very long ids stay text so nothing is altered; empty cells become null.
CSV is a table written as text: one row per line, values separated by commas. Every spreadsheet and database can import and export it, but it holds one sheet only and no formatting, formulas or data types.
Opens in Excel, Google Sheets, Numbers, databases and any text editor
CSV converterJSON represents data as nested objects and lists in plain text. It is the default language of web APIs. Unlike a spreadsheet it can be nested to any depth, which is also why turning it into rows and columns takes a decision about how to flatten it.
Opens in Any text editor, every programming language, browser developer tools
JSON converter| CSVCSV spreadsheet | JSONJSON data | |
|---|---|---|
| Stands for | Comma-Separated Values | JavaScript Object Notation |
| Type | Plain-text table | Structured data (text) |
| Compression | None | None |
| Introduced | The 1970s, by no single author (described in RFC 4180) | 2001, by Douglas Crockford |
| Opens in | Excel, Google Sheets, Numbers, databases and any text editor | Any text editor, every programming language, browser developer tools |
| Best for | Moving tabular data between systems | APIs and data exchanged between programs |
| File extension | .csv | .json |
No. The CSV to JSON conversion runs inside your browser, on your own phone or computer. The file is not sent to ToAny or to anyone else.
The values are kept. Anything JSON has no way to express, such as formatting, formulas or nesting, is simplified or left out.
Yes. Add as many as you like, convert them together and download each result or all of them as one ZIP.
The steps are the same everywhere because ToAny runs in the web browser: open this page in a current version of Chrome, Edge, Safari or Firefox, add the CSV file, press Convert and save the JSON. There is nothing to install.
Yes. Data files up to 300 MB are accepted; a larger file is refused with a message. Beyond that the limit is your device's memory, since nothing is uploaded; a computer copes with large files better than a phone.