CSV ToolsLocal
CSV to JSON
Convert CSV rows into structured JSON arrays.
CSV Tools
CSV Cleaner
Clean up rough CSV data and export a sharper file.
InputCSV, TXT
OutputTrimmed, deduped CSV
Works onAny modern browser
About this tool
Applies common CSV cleanup rules, previews the result, and exports a cleaned file.
Common use cases
- Remove noise from rough CSV exports before sharing them.
- Normalize headers and trim rows before downstream imports.
How to use it
- Paste CSV or upload a file.
- Choose cleanup options like trimming, deduplication, and header normalization.
- Preview the cleaned rows and download the result.
Best for
- Normalizing rough CSV exports before a conversion or import
- Trimming whitespace and deduplicating rows locally
- Previewing the cleaned file before downloading a new copy
Input and output notes
- Accepted inputs: .csv, .txt.
- Exports are generated locally in the current browser session.
Limits to know
- Large inputs can still be limited by browser memory.
- Unusual delimiters or quoting patterns may need manual confirmation.
Privacy
This tool runs in the browser, so pasted content and uploaded files stay on the current device during normal use.
Common next steps
Pick the right CSV workflow
CSV to JSON is for imports into apps and APIs
Use it when spreadsheet rows need to become JSON arrays that code and APIs can consume.
JSON to CSV is for exports and reportingUse it when structured objects need to become rows that business users can open in spreadsheet tools.
CSV Cleaner is for rough files before conversionStart with cleanup when whitespace, duplicate rows, or inconsistent headers will break the next step.
Common questions
Will the original file change?
No. The tool creates a cleaned copy in memory and leaves your source file untouched.
Can I preview the cleaned data first?
Yes. The first cleaned rows are shown before you download the final CSV.