Free · No signup · Runs in your browser
Trim & cleanwhitespace in CSV
Remove stray leading and trailing spaces and squash runs of internal spaces into one — across every column or just the ones you pick. Fully client-side.
Remove stray leading and trailing spaces and squash runs of internal spaces into one — across every column or just the ones you pick. Fully client-side.
Stray spaces break joins, dedupe, and lookups. This tool normalizes whitespace in your CSV in three quick steps, with a live count of how many cells changed.
Drop in your file. Everything parses in the browser — no upload, no server, no data leaving your device.
Choose which columns to clean (or leave empty for all), then toggle trimming the ends and collapsing internal double spaces.
Download standards-compliant CSV with normalized whitespace, plus a count of exactly how many cells were changed.
Invisible spaces are the silent killer of CSV workflows. A trailing space turns one category into two and quietly breaks every match.
"Active" and "Active " look identical but never join, group, or dedupe together. Trimming ends makes your keys line up.
Hand-typed and copy-pasted data is full of accidental double spaces. Collapsing them gives you clean, consistent text.
Sorting, filtering, validation, and dashboards all behave predictably once leading, trailing, and doubled spaces are gone.
The transform runs 100% in your browser. Nothing is uploaded, logged, or stored — your CSV never leaves the page.