What cleaning operations are supported?

Trimming leading and trailing whitespace, fixing inconsistent casing, removing blank rows, deleting duplicate rows, and standardizing date and number formats.

Can I clean just specific columns?

Yes — apply each cleaning step to the whole sheet or only to the columns you select.

Is my data uploaded anywhere?

No. All cleaning happens locally in your browser; nothing is sent to a server.

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*.xlsx*.csvup to 4 MB

Clean and Standardize Excel Data Online

Messy spreadsheets are full of trailing spaces, inconsistent capitalization, blank rows, and duplicate entries. Maplesheet cleans all of it in one place — trim whitespace, fix casing, remove blank rows, delete duplicates, and standardize date and number formats across columns.

Everything runs in your browser and downloads back as a clean .xlsx or .csv, so your data never touches a server.

How it works

Upload your .xlsx or .csv file.
Choose the cleaning steps you need — trim spaces, fix casing, remove blank rows, deduplicate, standardize formats.
Preview the cleaned result before you commit.
Download the tidied spreadsheet, ready to use.

Frequently asked questions

What cleaning operations are supported?: Trimming leading and trailing whitespace, fixing inconsistent casing, removing blank rows, deleting duplicate rows, and standardizing date and number formats.
Can I clean just specific columns?: Yes — apply each cleaning step to the whole sheet or only to the columns you select.
Is my data uploaded anywhere?: No. All cleaning happens locally in your browser; nothing is sent to a server.