Before you start
What you need
Comma-separated text with one non-empty, unique header row and at least one data row.
Developer & Data
CSV to JSON
Convert header-based CSV into a formatted array of JSON records with no server upload.
- 01Runs in this browser
- 02Limits are explicit
- 03Copy or download output
No black box
How this tool handles the input
The bounded CSV parser reads every row against the header width, then maps each cell to its column name. Cells remain strings so source values are not guessed.
What you get
What the page gives back
A formatted JSON array with one object per CSV data row.
Keep in mind
Use the result responsibly
Numbers, dates, booleans, and blank cells remain strings. Convert types deliberately in the receiving system.
Practical uses
Where this tool earns its place
- Turn a spreadsheet export into API fixture data.
- Inspect CSV rows as named objects.
- Prepare records for a controlled import script.
Verified data boundary
Source text stays on this page.
The published contract marks these tools as client-only processing. Nirmion uses the API only to confirm that this workspace is enabled in MySQL; source values and results are not sent to Flask.