How it works
Three steps — all local, all instant.
Drop or paste your data
Upload a CSV, Excel file, or paste any plain text directly in the browser. No file size limits imposed by servers.
Transform in-browser
Deduplicate rows, clean formatting, or convert plain text to structured Markdown — entirely inside JavaScript, on your device.
Export the result
Download your cleaned file as CSV, JSON, Excel (.xlsx), or Markdown (.txt). The file is generated locally and saved directly to your device.
Privacy is not a feature — it's the foundation.
Every computation happens inside your browser tab. Your files never touch our servers because we don't have any. The moment you close the tab, your data is gone. We designed it this way deliberately — the fewer systems your data passes through, the safer it stays.
What you can do with it
Remove duplicate rows
Identify and strip exact-match duplicate rows from any CSV or Excel file in one click.
Convert between formats
Export any spreadsheet as a clean CSV, JSON array, or formatted Excel file without reformatting by hand.
Convert plain text to Markdown
Paste unstructured prose or prompts — the tool detects headings, lists, and key-value pairs and outputs clean Markdown.
Preview before you export
Inspect a live data preview or Markdown source before downloading — no guesswork about what the output looks like.
Built with open-source libraries
No proprietary dependencies, no vendor lock-in.
PapaParse 5.4
CSV parsing
SheetJS 0.18
Excel reading & writing
Tailwind CSS
Styling
Vanilla JS
No framework
Ready to get started?
No sign-up. No install. Just open the tool and drop your file.
Open the tool