CSV to JSON
Turn a spreadsheet CSV into JSON records named by the header row. Your file never leaves your device.
Normal conversions happen on this device. Your files are not uploaded.
You gave me
What I can do with it
Technical details
About CSV files
CSV is the plain-text table format every spreadsheet can export. Many apps and APIs want the same data as JSON instead.
How to convert CSV to JSON
- Drop your CSV on the box above, or click it to choose it.
- Click “→ JSON”.
- Your file downloads. MunchFiles checks that the result opens correctly before it hands it to you.
What to expect
Rows become records named by the header row.
- Every value stays text (no number guessing).
- Short rows are padded with empty values.
Questions
Are my files uploaded anywhere?
No. MunchFiles converts files inside your web browser, on your own device. The file is never sent to a server, so nobody else can see it.
Is it free?
Yes. Basic file conversions are free, with no account and no watermark. MunchFiles Pro is an optional one-time purchase (no subscription) that keeps a copy of MunchFiles on your device, working offline, with power tools for batches, shrinking images and PDF pages.
Does it work on my phone?
Yes. It works in any modern browser on a phone, tablet or computer. There is nothing to install.
Are numbers kept as numbers?
No, every value stays text. “007” stays “007” instead of quietly becoming 7.
How big can the file be?
There’s no upload limit, because nothing is uploaded. Very large files are limited only by your device’s memory.
Take MunchFiles home
PROPay once and keep your own copy of MunchFiles on this device. It keeps working without internet and includes the power tools.
- Batch: process a pile of files at once
- Shrink: hit a size or dimension target
- PDF tools: merge, split, rotate and reorder pages
- Offline: keep MunchFiles installed on this device
Free online: basic file conversions. Pro: $9, once. No subscription.